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|
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<h1>Source code for urllib.request</h1><div class="highlight"><pre>
<span></span><span class="sd">"""An extensible library for opening URLs using a variety of protocols</span>
<span class="sd">The simplest way to use this module is to call the urlopen function,</span>
<span class="sd">which accepts a string containing a URL or a Request object (described</span>
<span class="sd">below). It opens the URL and returns the results as file-like</span>
<span class="sd">object; the returned object has some extra methods described below.</span>
<span class="sd">The OpenerDirector manages a collection of Handler objects that do</span>
<span class="sd">all the actual work. Each Handler implements a particular protocol or</span>
<span class="sd">option. The OpenerDirector is a composite object that invokes the</span>
<span class="sd">Handlers needed to open the requested URL. For example, the</span>
<span class="sd">HTTPHandler performs HTTP GET and POST requests and deals with</span>
<span class="sd">non-error returns. The HTTPRedirectHandler automatically deals with</span>
<span class="sd">HTTP 301, 302, 303 and 307 redirect errors, and the HTTPDigestAuthHandler</span>
<span class="sd">deals with digest authentication.</span>
<span class="sd">urlopen(url, data=None) -- Basic usage is the same as original</span>
<span class="sd">urllib. pass the url and optionally data to post to an HTTP URL, and</span>
<span class="sd">get a file-like object back. One difference is that you can also pass</span>
<span class="sd">a Request instance instead of URL. Raises a URLError (subclass of</span>
<span class="sd">OSError); for HTTP errors, raises an HTTPError, which can also be</span>
<span class="sd">treated as a valid response.</span>
<span class="sd">build_opener -- Function that creates a new OpenerDirector instance.</span>
<span class="sd">Will install the default handlers. Accepts one or more Handlers as</span>
<span class="sd">arguments, either instances or Handler classes that it will</span>
<span class="sd">instantiate. If one of the argument is a subclass of the default</span>
<span class="sd">handler, the argument will be installed instead of the default.</span>
<span class="sd">install_opener -- Installs a new opener as the default opener.</span>
<span class="sd">objects of interest:</span>
<span class="sd">OpenerDirector -- Sets up the User Agent as the Python-urllib client and manages</span>
<span class="sd">the Handler classes, while dealing with requests and responses.</span>
<span class="sd">Request -- An object that encapsulates the state of a request. The</span>
<span class="sd">state can be as simple as the URL. It can also include extra HTTP</span>
<span class="sd">headers, e.g. a User-Agent.</span>
<span class="sd">BaseHandler --</span>
<span class="sd">internals:</span>
<span class="sd">BaseHandler and parent</span>
<span class="sd">_call_chain conventions</span>
<span class="sd">Example usage:</span>
<span class="sd">import urllib.request</span>
<span class="sd"># set up authentication info</span>
<span class="sd">authinfo = urllib.request.HTTPBasicAuthHandler()</span>
<span class="sd">authinfo.add_password(realm='PDQ Application',</span>
<span class="sd"> uri='https://mahler:8092/site-updates.py',</span>
<span class="sd"> user='klem',</span>
<span class="sd"> passwd='geheim$parole')</span>
<span class="sd">proxy_support = urllib.request.ProxyHandler({"http" : "http://ahad-haam:3128"})</span>
<span class="sd"># build a new opener that adds authentication and caching FTP handlers</span>
<span class="sd">opener = urllib.request.build_opener(proxy_support, authinfo,</span>
<span class="sd"> urllib.request.CacheFTPHandler)</span>
<span class="sd"># install it</span>
<span class="sd">urllib.request.install_opener(opener)</span>
<span class="sd">f = urllib.request.urlopen('http://www.python.org/')</span>
<span class="sd">"""</span>
<span class="c1"># XXX issues:</span>
<span class="c1"># If an authentication error handler that tries to perform</span>
<span class="c1"># authentication for some reason but fails, how should the error be</span>
<span class="c1"># signalled? The client needs to know the HTTP error code. But if</span>
<span class="c1"># the handler knows that the problem was, e.g., that it didn't know</span>
<span class="c1"># that hash algo that requested in the challenge, it would be good to</span>
<span class="c1"># pass that information along to the client, too.</span>
<span class="c1"># ftp errors aren't handled cleanly</span>
<span class="c1"># check digest against correct (i.e. non-apache) implementation</span>
<span class="c1"># Possible extensions:</span>
<span class="c1"># complex proxies XXX not sure what exactly was meant by this</span>
<span class="c1"># abstract factory for opener</span>
<span class="kn">import</span> <span class="nn">base64</span>
<span class="kn">import</span> <span class="nn">bisect</span>
<span class="kn">import</span> <span class="nn">email</span>
<span class="kn">import</span> <span class="nn">hashlib</span>
<span class="kn">import</span> <span class="nn">http.client</span>
<span class="kn">import</span> <span class="nn">io</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">posixpath</span>
<span class="kn">import</span> <span class="nn">re</span>
<span class="kn">import</span> <span class="nn">socket</span>
<span class="kn">import</span> <span class="nn">string</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">time</span>
<span class="kn">import</span> <span class="nn">tempfile</span>
<span class="kn">import</span> <span class="nn">contextlib</span>
<span class="kn">import</span> <span class="nn">warnings</span>
<span class="kn">from</span> <span class="nn">urllib.error</span> <span class="k">import</span> <span class="n">URLError</span><span class="p">,</span> <span class="n">HTTPError</span><span class="p">,</span> <span class="n">ContentTooShortError</span>
<span class="kn">from</span> <span class="nn">urllib.parse</span> <span class="k">import</span> <span class="p">(</span>
<span class="n">urlparse</span><span class="p">,</span> <span class="n">urlsplit</span><span class="p">,</span> <span class="n">urljoin</span><span class="p">,</span> <span class="n">unwrap</span><span class="p">,</span> <span class="n">quote</span><span class="p">,</span> <span class="n">unquote</span><span class="p">,</span>
<span class="n">splittype</span><span class="p">,</span> <span class="n">splithost</span><span class="p">,</span> <span class="n">splitport</span><span class="p">,</span> <span class="n">splituser</span><span class="p">,</span> <span class="n">splitpasswd</span><span class="p">,</span>
<span class="n">splitattr</span><span class="p">,</span> <span class="n">splitquery</span><span class="p">,</span> <span class="n">splitvalue</span><span class="p">,</span> <span class="n">splittag</span><span class="p">,</span> <span class="n">to_bytes</span><span class="p">,</span>
<span class="n">unquote_to_bytes</span><span class="p">,</span> <span class="n">urlunparse</span><span class="p">)</span>
<span class="kn">from</span> <span class="nn">urllib.response</span> <span class="k">import</span> <span class="n">addinfourl</span><span class="p">,</span> <span class="n">addclosehook</span>
<span class="c1"># check for SSL</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">ssl</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="n">_have_ssl</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">_have_ssl</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span>
<span class="c1"># Classes</span>
<span class="s1">'Request'</span><span class="p">,</span> <span class="s1">'OpenerDirector'</span><span class="p">,</span> <span class="s1">'BaseHandler'</span><span class="p">,</span> <span class="s1">'HTTPDefaultErrorHandler'</span><span class="p">,</span>
<span class="s1">'HTTPRedirectHandler'</span><span class="p">,</span> <span class="s1">'HTTPCookieProcessor'</span><span class="p">,</span> <span class="s1">'ProxyHandler'</span><span class="p">,</span>
<span class="s1">'HTTPPasswordMgr'</span><span class="p">,</span> <span class="s1">'HTTPPasswordMgrWithDefaultRealm'</span><span class="p">,</span>
<span class="s1">'HTTPPasswordMgrWithPriorAuth'</span><span class="p">,</span> <span class="s1">'AbstractBasicAuthHandler'</span><span class="p">,</span>
<span class="s1">'HTTPBasicAuthHandler'</span><span class="p">,</span> <span class="s1">'ProxyBasicAuthHandler'</span><span class="p">,</span> <span class="s1">'AbstractDigestAuthHandler'</span><span class="p">,</span>
<span class="s1">'HTTPDigestAuthHandler'</span><span class="p">,</span> <span class="s1">'ProxyDigestAuthHandler'</span><span class="p">,</span> <span class="s1">'HTTPHandler'</span><span class="p">,</span>
<span class="s1">'FileHandler'</span><span class="p">,</span> <span class="s1">'FTPHandler'</span><span class="p">,</span> <span class="s1">'CacheFTPHandler'</span><span class="p">,</span> <span class="s1">'DataHandler'</span><span class="p">,</span>
<span class="s1">'UnknownHandler'</span><span class="p">,</span> <span class="s1">'HTTPErrorProcessor'</span><span class="p">,</span>
<span class="c1"># Functions</span>
<span class="s1">'urlopen'</span><span class="p">,</span> <span class="s1">'install_opener'</span><span class="p">,</span> <span class="s1">'build_opener'</span><span class="p">,</span>
<span class="s1">'pathname2url'</span><span class="p">,</span> <span class="s1">'url2pathname'</span><span class="p">,</span> <span class="s1">'getproxies'</span><span class="p">,</span>
<span class="c1"># Legacy interface</span>
<span class="s1">'urlretrieve'</span><span class="p">,</span> <span class="s1">'urlcleanup'</span><span class="p">,</span> <span class="s1">'URLopener'</span><span class="p">,</span> <span class="s1">'FancyURLopener'</span><span class="p">,</span>
<span class="p">]</span>
<span class="c1"># used in User-Agent header sent</span>
<span class="n">__version__</span> <span class="o">=</span> <span class="s1">'</span><span class="si">%d</span><span class="s1">.</span><span class="si">%d</span><span class="s1">'</span> <span class="o">%</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span><span class="p">[:</span><span class="mi">2</span><span class="p">]</span>
<span class="n">_opener</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">urlopen</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="n">socket</span><span class="o">.</span><span class="n">_GLOBAL_DEFAULT_TIMEOUT</span><span class="p">,</span>
<span class="o">*</span><span class="p">,</span> <span class="n">cafile</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">capath</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">cadefault</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">'''Open the URL url, which can be either a string or a Request object.</span>
<span class="sd"> *data* must be an object specifying additional data to be sent to</span>
<span class="sd"> the server, or None if no such data is needed. See Request for</span>
<span class="sd"> details.</span>
<span class="sd"> urllib.request module uses HTTP/1.1 and includes a "Connection:close"</span>
<span class="sd"> header in its HTTP requests.</span>
<span class="sd"> The optional *timeout* parameter specifies a timeout in seconds for</span>
<span class="sd"> blocking operations like the connection attempt (if not specified, the</span>
<span class="sd"> global default timeout setting will be used). This only works for HTTP,</span>
<span class="sd"> HTTPS and FTP connections.</span>
<span class="sd"> If *context* is specified, it must be a ssl.SSLContext instance describing</span>
<span class="sd"> the various SSL options. See HTTPSConnection for more details.</span>
<span class="sd"> The optional *cafile* and *capath* parameters specify a set of trusted CA</span>
<span class="sd"> certificates for HTTPS requests. cafile should point to a single file</span>
<span class="sd"> containing a bundle of CA certificates, whereas capath should point to a</span>
<span class="sd"> directory of hashed certificate files. More information can be found in</span>
<span class="sd"> ssl.SSLContext.load_verify_locations().</span>
<span class="sd"> The *cadefault* parameter is ignored.</span>
<span class="sd"> This function always returns an object which can work as a context</span>
<span class="sd"> manager and has methods such as</span>
<span class="sd"> * geturl() - return the URL of the resource retrieved, commonly used to</span>
<span class="sd"> determine if a redirect was followed</span>
<span class="sd"> * info() - return the meta-information of the page, such as headers, in the</span>
<span class="sd"> form of an email.message_from_string() instance (see Quick Reference to</span>
<span class="sd"> HTTP Headers)</span>
<span class="sd"> * getcode() - return the HTTP status code of the response. Raises URLError</span>
<span class="sd"> on errors.</span>
<span class="sd"> For HTTP and HTTPS URLs, this function returns a http.client.HTTPResponse</span>
<span class="sd"> object slightly modified. In addition to the three new methods above, the</span>
<span class="sd"> msg attribute contains the same information as the reason attribute ---</span>
<span class="sd"> the reason phrase returned by the server --- instead of the response</span>
<span class="sd"> headers as it is specified in the documentation for HTTPResponse.</span>
<span class="sd"> For FTP, file, and data URLs and requests explicitly handled by legacy</span>
<span class="sd"> URLopener and FancyURLopener classes, this function returns a</span>
<span class="sd"> urllib.response.addinfourl object.</span>
<span class="sd"> Note that None may be returned if no handler handles the request (though</span>
<span class="sd"> the default installed global OpenerDirector uses UnknownHandler to ensure</span>
<span class="sd"> this never happens).</span>
<span class="sd"> In addition, if proxy settings are detected (for example, when a *_proxy</span>
<span class="sd"> environment variable like http_proxy is set), ProxyHandler is default</span>
<span class="sd"> installed and makes sure the requests are handled through the proxy.</span>
<span class="sd"> '''</span>
<span class="k">global</span> <span class="n">_opener</span>
<span class="k">if</span> <span class="n">cafile</span> <span class="ow">or</span> <span class="n">capath</span> <span class="ow">or</span> <span class="n">cadefault</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">warnings</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s2">"cafile, capath and cadefault are deprecated, use a "</span>
<span class="s2">"custom context instead."</span><span class="p">,</span> <span class="ne">DeprecationWarning</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span>
<span class="k">if</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
<span class="s2">"You can't pass both context and any of cafile, capath, and "</span>
<span class="s2">"cadefault"</span>
<span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">_have_ssl</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'SSL support not available'</span><span class="p">)</span>
<span class="n">context</span> <span class="o">=</span> <span class="n">ssl</span><span class="o">.</span><span class="n">create_default_context</span><span class="p">(</span><span class="n">ssl</span><span class="o">.</span><span class="n">Purpose</span><span class="o">.</span><span class="n">SERVER_AUTH</span><span class="p">,</span>
<span class="n">cafile</span><span class="o">=</span><span class="n">cafile</span><span class="p">,</span>
<span class="n">capath</span><span class="o">=</span><span class="n">capath</span><span class="p">)</span>
<span class="n">https_handler</span> <span class="o">=</span> <span class="n">HTTPSHandler</span><span class="p">(</span><span class="n">context</span><span class="o">=</span><span class="n">context</span><span class="p">)</span>
<span class="n">opener</span> <span class="o">=</span> <span class="n">build_opener</span><span class="p">(</span><span class="n">https_handler</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">context</span><span class="p">:</span>
<span class="n">https_handler</span> <span class="o">=</span> <span class="n">HTTPSHandler</span><span class="p">(</span><span class="n">context</span><span class="o">=</span><span class="n">context</span><span class="p">)</span>
<span class="n">opener</span> <span class="o">=</span> <span class="n">build_opener</span><span class="p">(</span><span class="n">https_handler</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">_opener</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">_opener</span> <span class="o">=</span> <span class="n">opener</span> <span class="o">=</span> <span class="n">build_opener</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">opener</span> <span class="o">=</span> <span class="n">_opener</span>
<span class="k">return</span> <span class="n">opener</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">timeout</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">install_opener</span><span class="p">(</span><span class="n">opener</span><span class="p">):</span>
<span class="k">global</span> <span class="n">_opener</span>
<span class="n">_opener</span> <span class="o">=</span> <span class="n">opener</span>
<span class="n">_url_tempfiles</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">def</span> <span class="nf">urlretrieve</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">reporthook</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Retrieve a URL into a temporary location on disk.</span>
<span class="sd"> Requires a URL argument. If a filename is passed, it is used as</span>
<span class="sd"> the temporary file location. The reporthook argument should be</span>
<span class="sd"> a callable that accepts a block number, a read size, and the</span>
<span class="sd"> total file size of the URL target. The data argument should be</span>
<span class="sd"> valid URL encoded data.</span>
<span class="sd"> If a filename is passed and the URL points to a local resource,</span>
<span class="sd"> the result is a copy from local file to new file.</span>
<span class="sd"> Returns a tuple containing the path to the newly created</span>
<span class="sd"> data file as well as the resulting HTTPMessage object.</span>
<span class="sd"> """</span>
<span class="n">url_type</span><span class="p">,</span> <span class="n">path</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="k">with</span> <span class="n">contextlib</span><span class="o">.</span><span class="n">closing</span><span class="p">(</span><span class="n">urlopen</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="p">))</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">fp</span><span class="o">.</span><span class="n">info</span><span class="p">()</span>
<span class="c1"># Just return the local path and the "headers" for file://</span>
<span class="c1"># URLs. No sense in performing a copy unless requested.</span>
<span class="k">if</span> <span class="n">url_type</span> <span class="o">==</span> <span class="s2">"file"</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">filename</span><span class="p">:</span>
<span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">normpath</span><span class="p">(</span><span class="n">path</span><span class="p">),</span> <span class="n">headers</span>
<span class="c1"># Handle temporary file setup.</span>
<span class="k">if</span> <span class="n">filename</span><span class="p">:</span>
<span class="n">tfp</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">tfp</span> <span class="o">=</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">NamedTemporaryFile</span><span class="p">(</span><span class="n">delete</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="n">filename</span> <span class="o">=</span> <span class="n">tfp</span><span class="o">.</span><span class="n">name</span>
<span class="n">_url_tempfiles</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">with</span> <span class="n">tfp</span><span class="p">:</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">filename</span><span class="p">,</span> <span class="n">headers</span>
<span class="n">bs</span> <span class="o">=</span> <span class="mi">1024</span><span class="o">*</span><span class="mi">8</span>
<span class="n">size</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
<span class="n">read</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">blocknum</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="s2">"content-length"</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">size</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">headers</span><span class="p">[</span><span class="s2">"Content-Length"</span><span class="p">])</span>
<span class="k">if</span> <span class="n">reporthook</span><span class="p">:</span>
<span class="n">reporthook</span><span class="p">(</span><span class="n">blocknum</span><span class="p">,</span> <span class="n">bs</span><span class="p">,</span> <span class="n">size</span><span class="p">)</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
<span class="n">block</span> <span class="o">=</span> <span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">bs</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">block</span><span class="p">:</span>
<span class="k">break</span>
<span class="n">read</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">block</span><span class="p">)</span>
<span class="n">tfp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">block</span><span class="p">)</span>
<span class="n">blocknum</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">reporthook</span><span class="p">:</span>
<span class="n">reporthook</span><span class="p">(</span><span class="n">blocknum</span><span class="p">,</span> <span class="n">bs</span><span class="p">,</span> <span class="n">size</span><span class="p">)</span>
<span class="k">if</span> <span class="n">size</span> <span class="o">>=</span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">read</span> <span class="o"><</span> <span class="n">size</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">ContentTooShortError</span><span class="p">(</span>
<span class="s2">"retrieval incomplete: got only </span><span class="si">%i</span><span class="s2"> out of </span><span class="si">%i</span><span class="s2"> bytes"</span>
<span class="o">%</span> <span class="p">(</span><span class="n">read</span><span class="p">,</span> <span class="n">size</span><span class="p">),</span> <span class="n">result</span><span class="p">)</span>
<span class="k">return</span> <span class="n">result</span>
<span class="k">def</span> <span class="nf">urlcleanup</span><span class="p">():</span>
<span class="sd">"""Clean up temporary files from urlretrieve calls."""</span>
<span class="k">for</span> <span class="n">temp_file</span> <span class="ow">in</span> <span class="n">_url_tempfiles</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">unlink</span><span class="p">(</span><span class="n">temp_file</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">del</span> <span class="n">_url_tempfiles</span><span class="p">[:]</span>
<span class="k">global</span> <span class="n">_opener</span>
<span class="k">if</span> <span class="n">_opener</span><span class="p">:</span>
<span class="n">_opener</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># copied from cookielib.py</span>
<span class="n">_cut_port_re</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="sa">r</span><span class="s2">":\d+$"</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">ASCII</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">request_host</span><span class="p">(</span><span class="n">request</span><span class="p">):</span>
<span class="sd">"""Return request-host, as defined by RFC 2965.</span>
<span class="sd"> Variation from RFC: returned value is lowercased, for convenient</span>
<span class="sd"> comparison.</span>
<span class="sd"> """</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">request</span><span class="o">.</span><span class="n">full_url</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">url</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span>
<span class="k">if</span> <span class="n">host</span> <span class="o">==</span> <span class="s2">""</span><span class="p">:</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">request</span><span class="o">.</span><span class="n">get_header</span><span class="p">(</span><span class="s2">"Host"</span><span class="p">,</span> <span class="s2">""</span><span class="p">)</span>
<span class="c1"># remove port, if present</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">_cut_port_re</span><span class="o">.</span><span class="n">sub</span><span class="p">(</span><span class="s2">""</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">return</span> <span class="n">host</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">class</span> <span class="nc">Request</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="p">{},</span>
<span class="n">origin_req_host</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">unverifiable</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
<span class="n">method</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">full_url</span> <span class="o">=</span> <span class="n">url</span>
<span class="bp">self</span><span class="o">.</span><span class="n">headers</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">unredirected_hdrs</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_data</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">data</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_tunnel_host</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="n">headers</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="bp">self</span><span class="o">.</span><span class="n">add_header</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
<span class="k">if</span> <span class="n">origin_req_host</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">origin_req_host</span> <span class="o">=</span> <span class="n">request_host</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">origin_req_host</span> <span class="o">=</span> <span class="n">origin_req_host</span>
<span class="bp">self</span><span class="o">.</span><span class="n">unverifiable</span> <span class="o">=</span> <span class="n">unverifiable</span>
<span class="k">if</span> <span class="n">method</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">method</span> <span class="o">=</span> <span class="n">method</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">full_url</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">fragment</span><span class="p">:</span>
<span class="k">return</span> <span class="s1">'</span><span class="si">{}</span><span class="s1">#</span><span class="si">{}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_full_url</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">fragment</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_full_url</span>
<span class="nd">@full_url</span><span class="o">.</span><span class="n">setter</span>
<span class="k">def</span> <span class="nf">full_url</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">):</span>
<span class="c1"># unwrap('<URL:type://host/path>') --> 'type://host/path'</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_full_url</span> <span class="o">=</span> <span class="n">unwrap</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_full_url</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">fragment</span> <span class="o">=</span> <span class="n">splittag</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_full_url</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_parse</span><span class="p">()</span>
<span class="nd">@full_url</span><span class="o">.</span><span class="n">deleter</span>
<span class="k">def</span> <span class="nf">full_url</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_full_url</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">fragment</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selector</span> <span class="o">=</span> <span class="s1">''</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_data</span>
<span class="nd">@data</span><span class="o">.</span><span class="n">setter</span>
<span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span>
<span class="k">if</span> <span class="n">data</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_data</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_data</span> <span class="o">=</span> <span class="n">data</span>
<span class="c1"># issue 16464</span>
<span class="c1"># if we change data we need to remove content-length header</span>
<span class="c1"># (cause it's most probably calculated for previous value)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="s2">"Content-length"</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">remove_header</span><span class="p">(</span><span class="s2">"Content-length"</span><span class="p">)</span>
<span class="nd">@data</span><span class="o">.</span><span class="n">deleter</span>
<span class="k">def</span> <span class="nf">data</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">_parse</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="p">,</span> <span class="n">rest</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_full_url</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"unknown url type: </span><span class="si">%r</span><span class="s2">"</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">full_url</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">selector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">rest</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">host</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">host</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_method</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""Return a string indicating the HTTP request method."""</span>
<span class="n">default_method</span> <span class="o">=</span> <span class="s2">"POST"</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="k">else</span> <span class="s2">"GET"</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s1">'method'</span><span class="p">,</span> <span class="n">default_method</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_full_url</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">full_url</span>
<span class="k">def</span> <span class="nf">set_proxy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="nb">type</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span> <span class="o">==</span> <span class="s1">'https'</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_tunnel_host</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_tunnel_host</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">host</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">type</span><span class="o">=</span> <span class="nb">type</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selector</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">full_url</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host</span> <span class="o">=</span> <span class="n">host</span>
<span class="k">def</span> <span class="nf">has_proxy</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">selector</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">full_url</span>
<span class="k">def</span> <span class="nf">add_header</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">val</span><span class="p">):</span>
<span class="c1"># useful for something like authentication</span>
<span class="bp">self</span><span class="o">.</span><span class="n">headers</span><span class="p">[</span><span class="n">key</span><span class="o">.</span><span class="n">capitalize</span><span class="p">()]</span> <span class="o">=</span> <span class="n">val</span>
<span class="k">def</span> <span class="nf">add_unredirected_header</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">val</span><span class="p">):</span>
<span class="c1"># will not be added to a redirected request</span>
<span class="bp">self</span><span class="o">.</span><span class="n">unredirected_hdrs</span><span class="p">[</span><span class="n">key</span><span class="o">.</span><span class="n">capitalize</span><span class="p">()]</span> <span class="o">=</span> <span class="n">val</span>
<span class="k">def</span> <span class="nf">has_header</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">header_name</span><span class="p">):</span>
<span class="k">return</span> <span class="p">(</span><span class="n">header_name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">headers</span> <span class="ow">or</span>
<span class="n">header_name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">unredirected_hdrs</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_header</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">header_name</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">headers</span><span class="o">.</span><span class="n">get</span><span class="p">(</span>
<span class="n">header_name</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">unredirected_hdrs</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">header_name</span><span class="p">,</span> <span class="n">default</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">remove_header</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">header_name</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">headers</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">header_name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">unredirected_hdrs</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">header_name</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">header_items</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">hdrs</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">unredirected_hdrs</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="n">hdrs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">headers</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">hdrs</span><span class="o">.</span><span class="n">items</span><span class="p">())</span>
<span class="k">class</span> <span class="nc">OpenerDirector</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">client_version</span> <span class="o">=</span> <span class="s2">"Python-urllib/</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">__version__</span>
<span class="bp">self</span><span class="o">.</span><span class="n">addheaders</span> <span class="o">=</span> <span class="p">[(</span><span class="s1">'User-agent'</span><span class="p">,</span> <span class="n">client_version</span><span class="p">)]</span>
<span class="c1"># self.handlers is retained only for backward compatibility</span>
<span class="bp">self</span><span class="o">.</span><span class="n">handlers</span> <span class="o">=</span> <span class="p">[]</span>
<span class="c1"># manage the individual handlers</span>
<span class="bp">self</span><span class="o">.</span><span class="n">handle_open</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">handle_error</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">process_response</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">process_request</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">def</span> <span class="nf">add_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">handler</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">handler</span><span class="p">,</span> <span class="s2">"add_parent"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s2">"expected BaseHandler instance, got </span><span class="si">%r</span><span class="s2">"</span> <span class="o">%</span>
<span class="nb">type</span><span class="p">(</span><span class="n">handler</span><span class="p">))</span>
<span class="n">added</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">for</span> <span class="n">meth</span> <span class="ow">in</span> <span class="nb">dir</span><span class="p">(</span><span class="n">handler</span><span class="p">):</span>
<span class="k">if</span> <span class="n">meth</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"redirect_request"</span><span class="p">,</span> <span class="s2">"do_open"</span><span class="p">,</span> <span class="s2">"proxy_open"</span><span class="p">]:</span>
<span class="c1"># oops, coincidental match</span>
<span class="k">continue</span>
<span class="n">i</span> <span class="o">=</span> <span class="n">meth</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s2">"_"</span><span class="p">)</span>
<span class="n">protocol</span> <span class="o">=</span> <span class="n">meth</span><span class="p">[:</span><span class="n">i</span><span class="p">]</span>
<span class="n">condition</span> <span class="o">=</span> <span class="n">meth</span><span class="p">[</span><span class="n">i</span><span class="o">+</span><span class="mi">1</span><span class="p">:]</span>
<span class="k">if</span> <span class="n">condition</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s2">"error"</span><span class="p">):</span>
<span class="n">j</span> <span class="o">=</span> <span class="n">condition</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s2">"_"</span><span class="p">)</span> <span class="o">+</span> <span class="n">i</span> <span class="o">+</span> <span class="mi">1</span>
<span class="n">kind</span> <span class="o">=</span> <span class="n">meth</span><span class="p">[</span><span class="n">j</span><span class="o">+</span><span class="mi">1</span><span class="p">:]</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">kind</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">kind</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="n">lookup</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">handle_error</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">protocol</span><span class="p">,</span> <span class="p">{})</span>
<span class="bp">self</span><span class="o">.</span><span class="n">handle_error</span><span class="p">[</span><span class="n">protocol</span><span class="p">]</span> <span class="o">=</span> <span class="n">lookup</span>
<span class="k">elif</span> <span class="n">condition</span> <span class="o">==</span> <span class="s2">"open"</span><span class="p">:</span>
<span class="n">kind</span> <span class="o">=</span> <span class="n">protocol</span>
<span class="n">lookup</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">handle_open</span>
<span class="k">elif</span> <span class="n">condition</span> <span class="o">==</span> <span class="s2">"response"</span><span class="p">:</span>
<span class="n">kind</span> <span class="o">=</span> <span class="n">protocol</span>
<span class="n">lookup</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_response</span>
<span class="k">elif</span> <span class="n">condition</span> <span class="o">==</span> <span class="s2">"request"</span><span class="p">:</span>
<span class="n">kind</span> <span class="o">=</span> <span class="n">protocol</span>
<span class="n">lookup</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_request</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">continue</span>
<span class="n">handlers</span> <span class="o">=</span> <span class="n">lookup</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">kind</span><span class="p">,</span> <span class="p">[])</span>
<span class="k">if</span> <span class="n">handlers</span><span class="p">:</span>
<span class="n">bisect</span><span class="o">.</span><span class="n">insort</span><span class="p">(</span><span class="n">handlers</span><span class="p">,</span> <span class="n">handler</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">handlers</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">handler</span><span class="p">)</span>
<span class="n">added</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">if</span> <span class="n">added</span><span class="p">:</span>
<span class="n">bisect</span><span class="o">.</span><span class="n">insort</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handlers</span><span class="p">,</span> <span class="n">handler</span><span class="p">)</span>
<span class="n">handler</span><span class="o">.</span><span class="n">add_parent</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">close</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Only exists for backwards compatibility.</span>
<span class="k">pass</span>
<span class="k">def</span> <span class="nf">_call_chain</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chain</span><span class="p">,</span> <span class="n">kind</span><span class="p">,</span> <span class="n">meth_name</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="c1"># Handlers raise an exception if no one else should try to handle</span>
<span class="c1"># the request, or return None if they can't but another handler</span>
<span class="c1"># could. Otherwise, they return the response.</span>
<span class="n">handlers</span> <span class="o">=</span> <span class="n">chain</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">kind</span><span class="p">,</span> <span class="p">())</span>
<span class="k">for</span> <span class="n">handler</span> <span class="ow">in</span> <span class="n">handlers</span><span class="p">:</span>
<span class="n">func</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">handler</span><span class="p">,</span> <span class="n">meth_name</span><span class="p">)</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">func</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span>
<span class="k">if</span> <span class="n">result</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="n">result</span>
<span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fullurl</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="n">socket</span><span class="o">.</span><span class="n">_GLOBAL_DEFAULT_TIMEOUT</span><span class="p">):</span>
<span class="c1"># accept a URL or a Request object</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">fullurl</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">Request</span><span class="p">(</span><span class="n">fullurl</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">fullurl</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">req</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">data</span>
<span class="n">req</span><span class="o">.</span><span class="n">timeout</span> <span class="o">=</span> <span class="n">timeout</span>
<span class="n">protocol</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">type</span>
<span class="c1"># pre-process request</span>
<span class="n">meth_name</span> <span class="o">=</span> <span class="n">protocol</span><span class="o">+</span><span class="s2">"_request"</span>
<span class="k">for</span> <span class="n">processor</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_request</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">protocol</span><span class="p">,</span> <span class="p">[]):</span>
<span class="n">meth</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">processor</span><span class="p">,</span> <span class="n">meth_name</span><span class="p">)</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">meth</span><span class="p">(</span><span class="n">req</span><span class="p">)</span>
<span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_open</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="c1"># post-process response</span>
<span class="n">meth_name</span> <span class="o">=</span> <span class="n">protocol</span><span class="o">+</span><span class="s2">"_response"</span>
<span class="k">for</span> <span class="n">processor</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">process_response</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">protocol</span><span class="p">,</span> <span class="p">[]):</span>
<span class="n">meth</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">processor</span><span class="p">,</span> <span class="n">meth_name</span><span class="p">)</span>
<span class="n">response</span> <span class="o">=</span> <span class="n">meth</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">response</span><span class="p">)</span>
<span class="k">return</span> <span class="n">response</span>
<span class="k">def</span> <span class="nf">_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">result</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_call_chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handle_open</span><span class="p">,</span> <span class="s1">'default'</span><span class="p">,</span>
<span class="s1">'default_open'</span><span class="p">,</span> <span class="n">req</span><span class="p">)</span>
<span class="k">if</span> <span class="n">result</span><span class="p">:</span>
<span class="k">return</span> <span class="n">result</span>
<span class="n">protocol</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">type</span>
<span class="n">result</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_call_chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handle_open</span><span class="p">,</span> <span class="n">protocol</span><span class="p">,</span> <span class="n">protocol</span> <span class="o">+</span>
<span class="s1">'_open'</span><span class="p">,</span> <span class="n">req</span><span class="p">)</span>
<span class="k">if</span> <span class="n">result</span><span class="p">:</span>
<span class="k">return</span> <span class="n">result</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_call_chain</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">handle_open</span><span class="p">,</span> <span class="s1">'unknown'</span><span class="p">,</span>
<span class="s1">'unknown_open'</span><span class="p">,</span> <span class="n">req</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">error</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">proto</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="k">if</span> <span class="n">proto</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'http'</span><span class="p">,</span> <span class="s1">'https'</span><span class="p">):</span>
<span class="c1"># XXX http[s] protocols are special-cased</span>
<span class="nb">dict</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">handle_error</span><span class="p">[</span><span class="s1">'http'</span><span class="p">]</span> <span class="c1"># https is not different than http</span>
<span class="n">proto</span> <span class="o">=</span> <span class="n">args</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="c1"># YUCK!</span>
<span class="n">meth_name</span> <span class="o">=</span> <span class="s1">'http_error_</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">proto</span>
<span class="n">http_err</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">orig_args</span> <span class="o">=</span> <span class="n">args</span>
<span class="k">else</span><span class="p">:</span>
<span class="nb">dict</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">handle_error</span>
<span class="n">meth_name</span> <span class="o">=</span> <span class="n">proto</span> <span class="o">+</span> <span class="s1">'_error'</span>
<span class="n">http_err</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">args</span> <span class="o">=</span> <span class="p">(</span><span class="nb">dict</span><span class="p">,</span> <span class="n">proto</span><span class="p">,</span> <span class="n">meth_name</span><span class="p">)</span> <span class="o">+</span> <span class="n">args</span>
<span class="n">result</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_call_chain</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span>
<span class="k">if</span> <span class="n">result</span><span class="p">:</span>
<span class="k">return</span> <span class="n">result</span>
<span class="k">if</span> <span class="n">http_err</span><span class="p">:</span>
<span class="n">args</span> <span class="o">=</span> <span class="p">(</span><span class="nb">dict</span><span class="p">,</span> <span class="s1">'default'</span><span class="p">,</span> <span class="s1">'http_error_default'</span><span class="p">)</span> <span class="o">+</span> <span class="n">orig_args</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_call_chain</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span>
<span class="c1"># XXX probably also want an abstract factory that knows when it makes</span>
<span class="c1"># sense to skip a superclass in favor of a subclass and when it might</span>
<span class="c1"># make sense to include both</span>
<span class="k">def</span> <span class="nf">build_opener</span><span class="p">(</span><span class="o">*</span><span class="n">handlers</span><span class="p">):</span>
<span class="sd">"""Create an opener object from a list of handlers.</span>
<span class="sd"> The opener will use several default handlers, including support</span>
<span class="sd"> for HTTP, FTP and when applicable HTTPS.</span>
<span class="sd"> If any of the handlers passed as arguments are subclasses of the</span>
<span class="sd"> default handlers, the default handlers will not be used.</span>
<span class="sd"> """</span>
<span class="n">opener</span> <span class="o">=</span> <span class="n">OpenerDirector</span><span class="p">()</span>
<span class="n">default_classes</span> <span class="o">=</span> <span class="p">[</span><span class="n">ProxyHandler</span><span class="p">,</span> <span class="n">UnknownHandler</span><span class="p">,</span> <span class="n">HTTPHandler</span><span class="p">,</span>
<span class="n">HTTPDefaultErrorHandler</span><span class="p">,</span> <span class="n">HTTPRedirectHandler</span><span class="p">,</span>
<span class="n">FTPHandler</span><span class="p">,</span> <span class="n">FileHandler</span><span class="p">,</span> <span class="n">HTTPErrorProcessor</span><span class="p">,</span>
<span class="n">DataHandler</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="p">,</span> <span class="s2">"HTTPSConnection"</span><span class="p">):</span>
<span class="n">default_classes</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">HTTPSHandler</span><span class="p">)</span>
<span class="n">skip</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
<span class="k">for</span> <span class="n">klass</span> <span class="ow">in</span> <span class="n">default_classes</span><span class="p">:</span>
<span class="k">for</span> <span class="n">check</span> <span class="ow">in</span> <span class="n">handlers</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">check</span><span class="p">,</span> <span class="nb">type</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">issubclass</span><span class="p">(</span><span class="n">check</span><span class="p">,</span> <span class="n">klass</span><span class="p">):</span>
<span class="n">skip</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">klass</span><span class="p">)</span>
<span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">check</span><span class="p">,</span> <span class="n">klass</span><span class="p">):</span>
<span class="n">skip</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">klass</span><span class="p">)</span>
<span class="k">for</span> <span class="n">klass</span> <span class="ow">in</span> <span class="n">skip</span><span class="p">:</span>
<span class="n">default_classes</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">klass</span><span class="p">)</span>
<span class="k">for</span> <span class="n">klass</span> <span class="ow">in</span> <span class="n">default_classes</span><span class="p">:</span>
<span class="n">opener</span><span class="o">.</span><span class="n">add_handler</span><span class="p">(</span><span class="n">klass</span><span class="p">())</span>
<span class="k">for</span> <span class="n">h</span> <span class="ow">in</span> <span class="n">handlers</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">h</span><span class="p">,</span> <span class="nb">type</span><span class="p">):</span>
<span class="n">h</span> <span class="o">=</span> <span class="n">h</span><span class="p">()</span>
<span class="n">opener</span><span class="o">.</span><span class="n">add_handler</span><span class="p">(</span><span class="n">h</span><span class="p">)</span>
<span class="k">return</span> <span class="n">opener</span>
<span class="k">class</span> <span class="nc">BaseHandler</span><span class="p">:</span>
<span class="n">handler_order</span> <span class="o">=</span> <span class="mi">500</span>
<span class="k">def</span> <span class="nf">add_parent</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">parent</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">parent</span> <span class="o">=</span> <span class="n">parent</span>
<span class="k">def</span> <span class="nf">close</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Only exists for backwards compatibility</span>
<span class="k">pass</span>
<span class="k">def</span> <span class="nf">__lt__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="s2">"handler_order"</span><span class="p">):</span>
<span class="c1"># Try to preserve the old behavior of having custom classes</span>
<span class="c1"># inserted after default ones (works only for custom user</span>
<span class="c1"># classes which are not aware of handler_order).</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">handler_order</span> <span class="o"><</span> <span class="n">other</span><span class="o">.</span><span class="n">handler_order</span>
<span class="k">class</span> <span class="nc">HTTPErrorProcessor</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="sd">"""Process HTTP error responses."""</span>
<span class="n">handler_order</span> <span class="o">=</span> <span class="mi">1000</span> <span class="c1"># after all other processing</span>
<span class="k">def</span> <span class="nf">http_response</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">,</span> <span class="n">response</span><span class="p">):</span>
<span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">hdrs</span> <span class="o">=</span> <span class="n">response</span><span class="o">.</span><span class="n">code</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">msg</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">info</span><span class="p">()</span>
<span class="c1"># According to RFC 2616, "2xx" code indicates that the client's</span>
<span class="c1"># request was successfully received, understood, and accepted.</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="mi">200</span> <span class="o"><=</span> <span class="n">code</span> <span class="o"><</span> <span class="mi">300</span><span class="p">):</span>
<span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">error</span><span class="p">(</span>
<span class="s1">'http'</span><span class="p">,</span> <span class="n">request</span><span class="p">,</span> <span class="n">response</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">hdrs</span><span class="p">)</span>
<span class="k">return</span> <span class="n">response</span>
<span class="n">https_response</span> <span class="o">=</span> <span class="n">http_response</span>
<span class="k">class</span> <span class="nc">HTTPDefaultErrorHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">hdrs</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">HTTPError</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">hdrs</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">HTTPRedirectHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="c1"># maximum number of redirections to any single URL</span>
<span class="c1"># this is needed because of the state that cookies introduce</span>
<span class="n">max_repeats</span> <span class="o">=</span> <span class="mi">4</span>
<span class="c1"># maximum total number of redirections (regardless of URL) before</span>
<span class="c1"># assuming we're in a loop</span>
<span class="n">max_redirections</span> <span class="o">=</span> <span class="mi">10</span>
<span class="k">def</span> <span class="nf">redirect_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">newurl</span><span class="p">):</span>
<span class="sd">"""Return a Request or None in response to a redirect.</span>
<span class="sd"> This is called by the http_error_30x methods when a</span>
<span class="sd"> redirection response is received. If a redirection should</span>
<span class="sd"> take place, return a new Request to allow http_error_30x to</span>
<span class="sd"> perform the redirect. Otherwise, raise HTTPError if no-one</span>
<span class="sd"> else should try to handle this url. Return None if you can't</span>
<span class="sd"> but another Handler might.</span>
<span class="sd"> """</span>
<span class="n">m</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">get_method</span><span class="p">()</span>
<span class="k">if</span> <span class="p">(</span><span class="ow">not</span> <span class="p">(</span><span class="n">code</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">301</span><span class="p">,</span> <span class="mi">302</span><span class="p">,</span> <span class="mi">303</span><span class="p">,</span> <span class="mi">307</span><span class="p">)</span> <span class="ow">and</span> <span class="n">m</span> <span class="ow">in</span> <span class="p">(</span><span class="s2">"GET"</span><span class="p">,</span> <span class="s2">"HEAD"</span><span class="p">)</span>
<span class="ow">or</span> <span class="n">code</span> <span class="ow">in</span> <span class="p">(</span><span class="mi">301</span><span class="p">,</span> <span class="mi">302</span><span class="p">,</span> <span class="mi">303</span><span class="p">)</span> <span class="ow">and</span> <span class="n">m</span> <span class="o">==</span> <span class="s2">"POST"</span><span class="p">)):</span>
<span class="k">raise</span> <span class="n">HTTPError</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span>
<span class="c1"># Strictly (according to RFC 2616), 301 or 302 in response to</span>
<span class="c1"># a POST MUST NOT cause a redirection without confirmation</span>
<span class="c1"># from the user (of urllib.request, in this case). In practice,</span>
<span class="c1"># essentially all clients do redirect in this case, so we do</span>
<span class="c1"># the same.</span>
<span class="c1"># Be conciliant with URIs containing a space. This is mainly</span>
<span class="c1"># redundant with the more complete encoding done in http_error_302(),</span>
<span class="c1"># but it is kept for compatibility with other callers.</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">newurl</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">' '</span><span class="p">,</span> <span class="s1">'%20'</span><span class="p">)</span>
<span class="n">CONTENT_HEADERS</span> <span class="o">=</span> <span class="p">(</span><span class="s2">"content-length"</span><span class="p">,</span> <span class="s2">"content-type"</span><span class="p">)</span>
<span class="n">newheaders</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="n">v</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">req</span><span class="o">.</span><span class="n">headers</span><span class="o">.</span><span class="n">items</span><span class="p">()</span>
<span class="k">if</span> <span class="n">k</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">CONTENT_HEADERS</span><span class="p">}</span>
<span class="k">return</span> <span class="n">Request</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span>
<span class="n">headers</span><span class="o">=</span><span class="n">newheaders</span><span class="p">,</span>
<span class="n">origin_req_host</span><span class="o">=</span><span class="n">req</span><span class="o">.</span><span class="n">origin_req_host</span><span class="p">,</span>
<span class="n">unverifiable</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="c1"># Implementation note: To avoid the server sending us into an</span>
<span class="c1"># infinite loop, the request object needs to track what URLs we</span>
<span class="c1"># have already seen. Do this by adding a handler-specific</span>
<span class="c1"># attribute to the Request object.</span>
<span class="k">def</span> <span class="nf">http_error_302</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="c1"># Some servers (incorrectly) return multiple Location headers</span>
<span class="c1"># (so probably same goes for URI). Use first header.</span>
<span class="k">if</span> <span class="s2">"location"</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">headers</span><span class="p">[</span><span class="s2">"location"</span><span class="p">]</span>
<span class="k">elif</span> <span class="s2">"uri"</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">headers</span><span class="p">[</span><span class="s2">"uri"</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span>
<span class="c1"># fix a possible malformed URL</span>
<span class="n">urlparts</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">newurl</span><span class="p">)</span>
<span class="c1"># For security reasons we don't allow redirection to anything other</span>
<span class="c1"># than http, https or ftp.</span>
<span class="k">if</span> <span class="n">urlparts</span><span class="o">.</span><span class="n">scheme</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'http'</span><span class="p">,</span> <span class="s1">'https'</span><span class="p">,</span> <span class="s1">'ftp'</span><span class="p">,</span> <span class="s1">''</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">HTTPError</span><span class="p">(</span>
<span class="n">newurl</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span>
<span class="s2">"</span><span class="si">%s</span><span class="s2"> - Redirection to url '</span><span class="si">%s</span><span class="s2">' is not allowed"</span> <span class="o">%</span> <span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="n">newurl</span><span class="p">),</span>
<span class="n">headers</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">urlparts</span><span class="o">.</span><span class="n">path</span> <span class="ow">and</span> <span class="n">urlparts</span><span class="o">.</span><span class="n">netloc</span><span class="p">:</span>
<span class="n">urlparts</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">urlparts</span><span class="p">)</span>
<span class="n">urlparts</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"/"</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">urlunparse</span><span class="p">(</span><span class="n">urlparts</span><span class="p">)</span>
<span class="c1"># http.client.parse_headers() decodes as ISO-8859-1. Recover the</span>
<span class="c1"># original bytes and percent-encode non-ASCII bytes, and any special</span>
<span class="c1"># characters such as the space.</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">quote</span><span class="p">(</span>
<span class="n">newurl</span><span class="p">,</span> <span class="n">encoding</span><span class="o">=</span><span class="s2">"iso-8859-1"</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="n">string</span><span class="o">.</span><span class="n">punctuation</span><span class="p">)</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">urljoin</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">,</span> <span class="n">newurl</span><span class="p">)</span>
<span class="c1"># XXX Probably want to forget about the state of the current</span>
<span class="c1"># request, although that might interact poorly with other</span>
<span class="c1"># handlers that also use handler-specific request attributes</span>
<span class="n">new</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">redirect_request</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">newurl</span><span class="p">)</span>
<span class="k">if</span> <span class="n">new</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="c1"># loop detection</span>
<span class="c1"># .redirect_dict has a key url if url was previously visited.</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="s1">'redirect_dict'</span><span class="p">):</span>
<span class="n">visited</span> <span class="o">=</span> <span class="n">new</span><span class="o">.</span><span class="n">redirect_dict</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">redirect_dict</span>
<span class="k">if</span> <span class="p">(</span><span class="n">visited</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">>=</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_repeats</span> <span class="ow">or</span>
<span class="nb">len</span><span class="p">(</span><span class="n">visited</span><span class="p">)</span> <span class="o">>=</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_redirections</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">HTTPError</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">inf_msg</span> <span class="o">+</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">visited</span> <span class="o">=</span> <span class="n">new</span><span class="o">.</span><span class="n">redirect_dict</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">redirect_dict</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">visited</span><span class="p">[</span><span class="n">newurl</span><span class="p">]</span> <span class="o">=</span> <span class="n">visited</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
<span class="c1"># Don't close the fp until we are sure that we won't use it</span>
<span class="c1"># with HTTPError.</span>
<span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
<span class="n">fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">new</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="n">req</span><span class="o">.</span><span class="n">timeout</span><span class="p">)</span>
<span class="n">http_error_301</span> <span class="o">=</span> <span class="n">http_error_303</span> <span class="o">=</span> <span class="n">http_error_307</span> <span class="o">=</span> <span class="n">http_error_302</span>
<span class="n">inf_msg</span> <span class="o">=</span> <span class="s2">"The HTTP server returned a redirect error that would "</span> \
<span class="s2">"lead to an infinite loop.</span><span class="se">\n</span><span class="s2">"</span> \
<span class="s2">"The last 30x error message was:</span><span class="se">\n</span><span class="s2">"</span>
<span class="k">def</span> <span class="nf">_parse_proxy</span><span class="p">(</span><span class="n">proxy</span><span class="p">):</span>
<span class="sd">"""Return (scheme, user, password, host/port) given a URL or an authority.</span>
<span class="sd"> If a URL is supplied, it must have an authority (host:port) component.</span>
<span class="sd"> According to RFC 3986, having an authority component means the URL must</span>
<span class="sd"> have two slashes after the scheme.</span>
<span class="sd"> """</span>
<span class="n">scheme</span><span class="p">,</span> <span class="n">r_scheme</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">proxy</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">r_scheme</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s2">"/"</span><span class="p">):</span>
<span class="c1"># authority</span>
<span class="n">scheme</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">authority</span> <span class="o">=</span> <span class="n">proxy</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># URL</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">r_scheme</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s2">"//"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"proxy URL with no authority: </span><span class="si">%r</span><span class="s2">"</span> <span class="o">%</span> <span class="n">proxy</span><span class="p">)</span>
<span class="c1"># We have an authority, so for RFC 3986-compliant URLs (by ss 3.</span>
<span class="c1"># and 3.3.), path is empty or starts with '/'</span>
<span class="n">end</span> <span class="o">=</span> <span class="n">r_scheme</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s2">"/"</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span>
<span class="k">if</span> <span class="n">end</span> <span class="o">==</span> <span class="o">-</span><span class="mi">1</span><span class="p">:</span>
<span class="n">end</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">authority</span> <span class="o">=</span> <span class="n">r_scheme</span><span class="p">[</span><span class="mi">2</span><span class="p">:</span><span class="n">end</span><span class="p">]</span>
<span class="n">userinfo</span><span class="p">,</span> <span class="n">hostport</span> <span class="o">=</span> <span class="n">splituser</span><span class="p">(</span><span class="n">authority</span><span class="p">)</span>
<span class="k">if</span> <span class="n">userinfo</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">user</span><span class="p">,</span> <span class="n">password</span> <span class="o">=</span> <span class="n">splitpasswd</span><span class="p">(</span><span class="n">userinfo</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">user</span> <span class="o">=</span> <span class="n">password</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">return</span> <span class="n">scheme</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">password</span><span class="p">,</span> <span class="n">hostport</span>
<span class="k">class</span> <span class="nc">ProxyHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="c1"># Proxies must be in front</span>
<span class="n">handler_order</span> <span class="o">=</span> <span class="mi">100</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">proxies</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">proxies</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">proxies</span> <span class="o">=</span> <span class="n">getproxies</span><span class="p">()</span>
<span class="k">assert</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">proxies</span><span class="p">,</span> <span class="s1">'keys'</span><span class="p">),</span> <span class="s2">"proxies must be a mapping"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">proxies</span> <span class="o">=</span> <span class="n">proxies</span>
<span class="k">for</span> <span class="nb">type</span><span class="p">,</span> <span class="n">url</span> <span class="ow">in</span> <span class="n">proxies</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="nb">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s1">'</span><span class="si">%s</span><span class="s1">_open'</span> <span class="o">%</span> <span class="nb">type</span><span class="p">,</span>
<span class="k">lambda</span> <span class="n">r</span><span class="p">,</span> <span class="n">proxy</span><span class="o">=</span><span class="n">url</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">type</span><span class="p">,</span> <span class="n">meth</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">proxy_open</span><span class="p">:</span>
<span class="n">meth</span><span class="p">(</span><span class="n">r</span><span class="p">,</span> <span class="n">proxy</span><span class="p">,</span> <span class="nb">type</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">proxy_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">proxy</span><span class="p">,</span> <span class="nb">type</span><span class="p">):</span>
<span class="n">orig_type</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">type</span>
<span class="n">proxy_type</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">password</span><span class="p">,</span> <span class="n">hostport</span> <span class="o">=</span> <span class="n">_parse_proxy</span><span class="p">(</span><span class="n">proxy</span><span class="p">)</span>
<span class="k">if</span> <span class="n">proxy_type</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">proxy_type</span> <span class="o">=</span> <span class="n">orig_type</span>
<span class="k">if</span> <span class="n">req</span><span class="o">.</span><span class="n">host</span> <span class="ow">and</span> <span class="n">proxy_bypass</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">host</span><span class="p">):</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">user</span> <span class="ow">and</span> <span class="n">password</span><span class="p">:</span>
<span class="n">user_pass</span> <span class="o">=</span> <span class="s1">'</span><span class="si">%s</span><span class="s1">:</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">unquote</span><span class="p">(</span><span class="n">user</span><span class="p">),</span>
<span class="n">unquote</span><span class="p">(</span><span class="n">password</span><span class="p">))</span>
<span class="n">creds</span> <span class="o">=</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="n">user_pass</span><span class="o">.</span><span class="n">encode</span><span class="p">())</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s2">"ascii"</span><span class="p">)</span>
<span class="n">req</span><span class="o">.</span><span class="n">add_header</span><span class="p">(</span><span class="s1">'Proxy-authorization'</span><span class="p">,</span> <span class="s1">'Basic '</span> <span class="o">+</span> <span class="n">creds</span><span class="p">)</span>
<span class="n">hostport</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">hostport</span><span class="p">)</span>
<span class="n">req</span><span class="o">.</span><span class="n">set_proxy</span><span class="p">(</span><span class="n">hostport</span><span class="p">,</span> <span class="n">proxy_type</span><span class="p">)</span>
<span class="k">if</span> <span class="n">orig_type</span> <span class="o">==</span> <span class="n">proxy_type</span> <span class="ow">or</span> <span class="n">orig_type</span> <span class="o">==</span> <span class="s1">'https'</span><span class="p">:</span>
<span class="c1"># let other handlers take care of it</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># need to start over, because the other handlers don't</span>
<span class="c1"># grok the proxy's URL type</span>
<span class="c1"># e.g. if we have a constructor arg proxies like so:</span>
<span class="c1"># {'http': 'ftp://proxy.example.com'}, we may end up turning</span>
<span class="c1"># a request for http://acme.example.com/a into one for</span>
<span class="c1"># ftp://proxy.example.com/a</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="n">req</span><span class="o">.</span><span class="n">timeout</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">HTTPPasswordMgr</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">def</span> <span class="nf">add_password</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">uri</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">):</span>
<span class="c1"># uri could be a single URI or a sequence</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">uri</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="n">uri</span> <span class="o">=</span> <span class="p">[</span><span class="n">uri</span><span class="p">]</span>
<span class="k">if</span> <span class="n">realm</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="p">[</span><span class="n">realm</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">for</span> <span class="n">default_port</span> <span class="ow">in</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">:</span>
<span class="n">reduced_uri</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">reduce_uri</span><span class="p">(</span><span class="n">u</span><span class="p">,</span> <span class="n">default_port</span><span class="p">)</span> <span class="k">for</span> <span class="n">u</span> <span class="ow">in</span> <span class="n">uri</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="p">[</span><span class="n">realm</span><span class="p">][</span><span class="n">reduced_uri</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">find_user_password</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">authuri</span><span class="p">):</span>
<span class="n">domains</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">realm</span><span class="p">,</span> <span class="p">{})</span>
<span class="k">for</span> <span class="n">default_port</span> <span class="ow">in</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">:</span>
<span class="n">reduced_authuri</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">reduce_uri</span><span class="p">(</span><span class="n">authuri</span><span class="p">,</span> <span class="n">default_port</span><span class="p">)</span>
<span class="k">for</span> <span class="n">uris</span><span class="p">,</span> <span class="n">authinfo</span> <span class="ow">in</span> <span class="n">domains</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="k">for</span> <span class="n">uri</span> <span class="ow">in</span> <span class="n">uris</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_suburi</span><span class="p">(</span><span class="n">uri</span><span class="p">,</span> <span class="n">reduced_authuri</span><span class="p">):</span>
<span class="k">return</span> <span class="n">authinfo</span>
<span class="k">return</span> <span class="kc">None</span><span class="p">,</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">reduce_uri</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">uri</span><span class="p">,</span> <span class="n">default_port</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
<span class="sd">"""Accept authority or URI and extract only the authority and path."""</span>
<span class="c1"># note HTTP URLs do not have a userinfo component</span>
<span class="n">parts</span> <span class="o">=</span> <span class="n">urlsplit</span><span class="p">(</span><span class="n">uri</span><span class="p">)</span>
<span class="k">if</span> <span class="n">parts</span><span class="p">[</span><span class="mi">1</span><span class="p">]:</span>
<span class="c1"># URI</span>
<span class="n">scheme</span> <span class="o">=</span> <span class="n">parts</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">authority</span> <span class="o">=</span> <span class="n">parts</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">parts</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="ow">or</span> <span class="s1">'/'</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># host or host:port</span>
<span class="n">scheme</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">authority</span> <span class="o">=</span> <span class="n">uri</span>
<span class="n">path</span> <span class="o">=</span> <span class="s1">'/'</span>
<span class="n">host</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">authority</span><span class="p">)</span>
<span class="k">if</span> <span class="n">default_port</span> <span class="ow">and</span> <span class="n">port</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">scheme</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">dport</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"http"</span><span class="p">:</span> <span class="mi">80</span><span class="p">,</span>
<span class="s2">"https"</span><span class="p">:</span> <span class="mi">443</span><span class="p">,</span>
<span class="p">}</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">scheme</span><span class="p">)</span>
<span class="k">if</span> <span class="n">dport</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">authority</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%d</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">dport</span><span class="p">)</span>
<span class="k">return</span> <span class="n">authority</span><span class="p">,</span> <span class="n">path</span>
<span class="k">def</span> <span class="nf">is_suburi</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">base</span><span class="p">,</span> <span class="n">test</span><span class="p">):</span>
<span class="sd">"""Check if test is below base in a URI tree</span>
<span class="sd"> Both args must be URIs in reduced form.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">base</span> <span class="o">==</span> <span class="n">test</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="k">if</span> <span class="n">base</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">!=</span> <span class="n">test</span><span class="p">[</span><span class="mi">0</span><span class="p">]:</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="n">common</span> <span class="o">=</span> <span class="n">posixpath</span><span class="o">.</span><span class="n">commonprefix</span><span class="p">((</span><span class="n">base</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">test</span><span class="p">[</span><span class="mi">1</span><span class="p">]))</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">common</span><span class="p">)</span> <span class="o">==</span> <span class="nb">len</span><span class="p">(</span><span class="n">base</span><span class="p">[</span><span class="mi">1</span><span class="p">]):</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="k">class</span> <span class="nc">HTTPPasswordMgrWithDefaultRealm</span><span class="p">(</span><span class="n">HTTPPasswordMgr</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">find_user_password</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">authuri</span><span class="p">):</span>
<span class="n">user</span><span class="p">,</span> <span class="n">password</span> <span class="o">=</span> <span class="n">HTTPPasswordMgr</span><span class="o">.</span><span class="n">find_user_password</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span>
<span class="n">authuri</span><span class="p">)</span>
<span class="k">if</span> <span class="n">user</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="n">user</span><span class="p">,</span> <span class="n">password</span>
<span class="k">return</span> <span class="n">HTTPPasswordMgr</span><span class="o">.</span><span class="n">find_user_password</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="n">authuri</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">HTTPPasswordMgrWithPriorAuth</span><span class="p">(</span><span class="n">HTTPPasswordMgrWithDefaultRealm</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">authenticated</span> <span class="o">=</span> <span class="p">{}</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">add_password</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">uri</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">is_authenticated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update_authenticated</span><span class="p">(</span><span class="n">uri</span><span class="p">,</span> <span class="n">is_authenticated</span><span class="p">)</span>
<span class="c1"># Add a default for prior auth requests</span>
<span class="k">if</span> <span class="n">realm</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">add_password</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">uri</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">)</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="n">add_password</span><span class="p">(</span><span class="n">realm</span><span class="p">,</span> <span class="n">uri</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">update_authenticated</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">uri</span><span class="p">,</span> <span class="n">is_authenticated</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="c1"># uri could be a single URI or a sequence</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">uri</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="n">uri</span> <span class="o">=</span> <span class="p">[</span><span class="n">uri</span><span class="p">]</span>
<span class="k">for</span> <span class="n">default_port</span> <span class="ow">in</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">:</span>
<span class="k">for</span> <span class="n">u</span> <span class="ow">in</span> <span class="n">uri</span><span class="p">:</span>
<span class="n">reduced_uri</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">reduce_uri</span><span class="p">(</span><span class="n">u</span><span class="p">,</span> <span class="n">default_port</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">authenticated</span><span class="p">[</span><span class="n">reduced_uri</span><span class="p">]</span> <span class="o">=</span> <span class="n">is_authenticated</span>
<span class="k">def</span> <span class="nf">is_authenticated</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">authuri</span><span class="p">):</span>
<span class="k">for</span> <span class="n">default_port</span> <span class="ow">in</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">:</span>
<span class="n">reduced_authuri</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">reduce_uri</span><span class="p">(</span><span class="n">authuri</span><span class="p">,</span> <span class="n">default_port</span><span class="p">)</span>
<span class="k">for</span> <span class="n">uri</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">authenticated</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">is_suburi</span><span class="p">(</span><span class="n">uri</span><span class="p">,</span> <span class="n">reduced_authuri</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">authenticated</span><span class="p">[</span><span class="n">uri</span><span class="p">]</span>
<span class="k">class</span> <span class="nc">AbstractBasicAuthHandler</span><span class="p">:</span>
<span class="c1"># XXX this allows for multiple auth-schemes, but will stupidly pick</span>
<span class="c1"># the last one with a realm specified.</span>
<span class="c1"># allow for double- and single-quoted realm values</span>
<span class="c1"># (single quotes are a violation of the RFC, but appear in the wild)</span>
<span class="n">rx</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="s1">'(?:.*,)*[ </span><span class="se">\t</span><span class="s1">]*([^ </span><span class="se">\t</span><span class="s1">]+)[ </span><span class="se">\t</span><span class="s1">]+'</span>
<span class="s1">'realm=(["</span><span class="se">\'</span><span class="s1">]?)([^"</span><span class="se">\'</span><span class="s1">]*)</span><span class="se">\\</span><span class="s1">2'</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">I</span><span class="p">)</span>
<span class="c1"># XXX could pre-emptively send auth info already accepted (RFC 2617,</span>
<span class="c1"># end of section 2, and section 1.2 immediately after "credentials"</span>
<span class="c1"># production).</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">password_mgr</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">password_mgr</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">password_mgr</span> <span class="o">=</span> <span class="n">HTTPPasswordMgr</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span> <span class="o">=</span> <span class="n">password_mgr</span>
<span class="bp">self</span><span class="o">.</span><span class="n">add_password</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">add_password</span>
<span class="k">def</span> <span class="nf">http_error_auth_reqed</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">authreq</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="c1"># host may be an authority (without userinfo) or a URL with an</span>
<span class="c1"># authority</span>
<span class="c1"># XXX could be multiple headers</span>
<span class="n">authreq</span> <span class="o">=</span> <span class="n">headers</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">authreq</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">authreq</span><span class="p">:</span>
<span class="n">scheme</span> <span class="o">=</span> <span class="n">authreq</span><span class="o">.</span><span class="n">split</span><span class="p">()[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">scheme</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">!=</span> <span class="s1">'basic'</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"AbstractBasicAuthHandler does not"</span>
<span class="s2">" support the following scheme: '</span><span class="si">%s</span><span class="s2">'"</span> <span class="o">%</span>
<span class="n">scheme</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">mo</span> <span class="o">=</span> <span class="n">AbstractBasicAuthHandler</span><span class="o">.</span><span class="n">rx</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">authreq</span><span class="p">)</span>
<span class="k">if</span> <span class="n">mo</span><span class="p">:</span>
<span class="n">scheme</span><span class="p">,</span> <span class="n">quote</span><span class="p">,</span> <span class="n">realm</span> <span class="o">=</span> <span class="n">mo</span><span class="o">.</span><span class="n">groups</span><span class="p">()</span>
<span class="k">if</span> <span class="n">quote</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">[</span><span class="s1">'"'</span><span class="p">,</span><span class="s2">"'"</span><span class="p">]:</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s2">"Basic Auth Realm was unquoted"</span><span class="p">,</span>
<span class="ne">UserWarning</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span>
<span class="k">if</span> <span class="n">scheme</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'basic'</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">retry_http_basic_auth</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">realm</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">retry_http_basic_auth</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">realm</span><span class="p">):</span>
<span class="n">user</span><span class="p">,</span> <span class="n">pw</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">find_user_password</span><span class="p">(</span><span class="n">realm</span><span class="p">,</span> <span class="n">host</span><span class="p">)</span>
<span class="k">if</span> <span class="n">pw</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">raw</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">pw</span><span class="p">)</span>
<span class="n">auth</span> <span class="o">=</span> <span class="s2">"Basic "</span> <span class="o">+</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="n">raw</span><span class="o">.</span><span class="n">encode</span><span class="p">())</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s2">"ascii"</span><span class="p">)</span>
<span class="k">if</span> <span class="n">req</span><span class="o">.</span><span class="n">get_header</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">auth_header</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="o">==</span> <span class="n">auth</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">req</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">auth_header</span><span class="p">,</span> <span class="n">auth</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="n">req</span><span class="o">.</span><span class="n">timeout</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">http_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="k">if</span> <span class="p">(</span><span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="p">,</span> <span class="s1">'is_authenticated'</span><span class="p">)</span> <span class="ow">or</span>
<span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">is_authenticated</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">)):</span>
<span class="k">return</span> <span class="n">req</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">req</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="s1">'Authorization'</span><span class="p">):</span>
<span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">find_user_password</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">)</span>
<span class="n">credentials</span> <span class="o">=</span> <span class="s1">'</span><span class="si">{0}</span><span class="s1">:</span><span class="si">{1}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">)</span><span class="o">.</span><span class="n">encode</span><span class="p">()</span>
<span class="n">auth_str</span> <span class="o">=</span> <span class="n">base64</span><span class="o">.</span><span class="n">standard_b64encode</span><span class="p">(</span><span class="n">credentials</span><span class="p">)</span><span class="o">.</span><span class="n">decode</span><span class="p">()</span>
<span class="n">req</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span><span class="s1">'Authorization'</span><span class="p">,</span>
<span class="s1">'Basic </span><span class="si">{}</span><span class="s1">'</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">auth_str</span><span class="o">.</span><span class="n">strip</span><span class="p">()))</span>
<span class="k">return</span> <span class="n">req</span>
<span class="k">def</span> <span class="nf">http_response</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">response</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="p">,</span> <span class="s1">'is_authenticated'</span><span class="p">):</span>
<span class="k">if</span> <span class="mi">200</span> <span class="o"><=</span> <span class="n">response</span><span class="o">.</span><span class="n">code</span> <span class="o"><</span> <span class="mi">300</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">update_authenticated</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">update_authenticated</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span>
<span class="k">return</span> <span class="n">response</span>
<span class="n">https_request</span> <span class="o">=</span> <span class="n">http_request</span>
<span class="n">https_response</span> <span class="o">=</span> <span class="n">http_response</span>
<span class="k">class</span> <span class="nc">HTTPBasicAuthHandler</span><span class="p">(</span><span class="n">AbstractBasicAuthHandler</span><span class="p">,</span> <span class="n">BaseHandler</span><span class="p">):</span>
<span class="n">auth_header</span> <span class="o">=</span> <span class="s1">'Authorization'</span>
<span class="k">def</span> <span class="nf">http_error_401</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">full_url</span>
<span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_auth_reqed</span><span class="p">(</span><span class="s1">'www-authenticate'</span><span class="p">,</span>
<span class="n">url</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">return</span> <span class="n">response</span>
<span class="k">class</span> <span class="nc">ProxyBasicAuthHandler</span><span class="p">(</span><span class="n">AbstractBasicAuthHandler</span><span class="p">,</span> <span class="n">BaseHandler</span><span class="p">):</span>
<span class="n">auth_header</span> <span class="o">=</span> <span class="s1">'Proxy-authorization'</span>
<span class="k">def</span> <span class="nf">http_error_407</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="c1"># http_error_auth_reqed requires that there is no userinfo component in</span>
<span class="c1"># authority. Assume there isn't one, since urllib.request does not (and</span>
<span class="c1"># should not, RFC 3986 s. 3.2.1) support requests for URLs containing</span>
<span class="c1"># userinfo.</span>
<span class="n">authority</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">host</span>
<span class="n">response</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_auth_reqed</span><span class="p">(</span><span class="s1">'proxy-authenticate'</span><span class="p">,</span>
<span class="n">authority</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">return</span> <span class="n">response</span>
<span class="c1"># Return n random bytes.</span>
<span class="n">_randombytes</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">urandom</span>
<span class="k">class</span> <span class="nc">AbstractDigestAuthHandler</span><span class="p">:</span>
<span class="c1"># Digest authentication is specified in RFC 2617.</span>
<span class="c1"># XXX The client does not inspect the Authentication-Info header</span>
<span class="c1"># in a successful response.</span>
<span class="c1"># XXX It should be possible to test this implementation against</span>
<span class="c1"># a mock server that just generates a static set of challenges.</span>
<span class="c1"># XXX qop="auth-int" supports is shaky</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">passwd</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">passwd</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">passwd</span> <span class="o">=</span> <span class="n">HTTPPasswordMgr</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span> <span class="o">=</span> <span class="n">passwd</span>
<span class="bp">self</span><span class="o">.</span><span class="n">add_password</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">add_password</span>
<span class="bp">self</span><span class="o">.</span><span class="n">retried</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">nonce_count</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">last_nonce</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">reset_retry_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">retried</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">http_error_auth_reqed</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">auth_header</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="n">authreq</span> <span class="o">=</span> <span class="n">headers</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">auth_header</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">retried</span> <span class="o">></span> <span class="mi">5</span><span class="p">:</span>
<span class="c1"># Don't fail endlessly - if we failed once, we'll probably</span>
<span class="c1"># fail a second time. Hm. Unless the Password Manager is</span>
<span class="c1"># prompting for the information. Crap. This isn't great</span>
<span class="c1"># but it's better than the current 'repeat until recursion</span>
<span class="c1"># depth exceeded' approach <wink></span>
<span class="k">raise</span> <span class="n">HTTPError</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">,</span> <span class="mi">401</span><span class="p">,</span> <span class="s2">"digest auth failed"</span><span class="p">,</span>
<span class="n">headers</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">retried</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">authreq</span><span class="p">:</span>
<span class="n">scheme</span> <span class="o">=</span> <span class="n">authreq</span><span class="o">.</span><span class="n">split</span><span class="p">()[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">scheme</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'digest'</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">retry_http_digest_auth</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">authreq</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">scheme</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">!=</span> <span class="s1">'basic'</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"AbstractDigestAuthHandler does not support"</span>
<span class="s2">" the following scheme: '</span><span class="si">%s</span><span class="s2">'"</span> <span class="o">%</span> <span class="n">scheme</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">retry_http_digest_auth</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">auth</span><span class="p">):</span>
<span class="n">token</span><span class="p">,</span> <span class="n">challenge</span> <span class="o">=</span> <span class="n">auth</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">' '</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">chal</span> <span class="o">=</span> <span class="n">parse_keqv_list</span><span class="p">(</span><span class="nb">filter</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">parse_http_list</span><span class="p">(</span><span class="n">challenge</span><span class="p">)))</span>
<span class="n">auth</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_authorization</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">chal</span><span class="p">)</span>
<span class="k">if</span> <span class="n">auth</span><span class="p">:</span>
<span class="n">auth_val</span> <span class="o">=</span> <span class="s1">'Digest </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">auth</span>
<span class="k">if</span> <span class="n">req</span><span class="o">.</span><span class="n">headers</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">auth_header</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span> <span class="o">==</span> <span class="n">auth_val</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">req</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">auth_header</span><span class="p">,</span> <span class="n">auth_val</span><span class="p">)</span>
<span class="n">resp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="n">req</span><span class="o">.</span><span class="n">timeout</span><span class="p">)</span>
<span class="k">return</span> <span class="n">resp</span>
<span class="k">def</span> <span class="nf">get_cnonce</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">nonce</span><span class="p">):</span>
<span class="c1"># The cnonce-value is an opaque</span>
<span class="c1"># quoted string value provided by the client and used by both client</span>
<span class="c1"># and server to avoid chosen plaintext attacks, to provide mutual</span>
<span class="c1"># authentication, and to provide some message integrity protection.</span>
<span class="c1"># This isn't a fabulous effort, but it's probably Good Enough.</span>
<span class="n">s</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">:"</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">nonce_count</span><span class="p">,</span> <span class="n">nonce</span><span class="p">,</span> <span class="n">time</span><span class="o">.</span><span class="n">ctime</span><span class="p">())</span>
<span class="n">b</span> <span class="o">=</span> <span class="n">s</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s2">"ascii"</span><span class="p">)</span> <span class="o">+</span> <span class="n">_randombytes</span><span class="p">(</span><span class="mi">8</span><span class="p">)</span>
<span class="n">dig</span> <span class="o">=</span> <span class="n">hashlib</span><span class="o">.</span><span class="n">sha1</span><span class="p">(</span><span class="n">b</span><span class="p">)</span><span class="o">.</span><span class="n">hexdigest</span><span class="p">()</span>
<span class="k">return</span> <span class="n">dig</span><span class="p">[:</span><span class="mi">16</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">get_authorization</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">chal</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">realm</span> <span class="o">=</span> <span class="n">chal</span><span class="p">[</span><span class="s1">'realm'</span><span class="p">]</span>
<span class="n">nonce</span> <span class="o">=</span> <span class="n">chal</span><span class="p">[</span><span class="s1">'nonce'</span><span class="p">]</span>
<span class="n">qop</span> <span class="o">=</span> <span class="n">chal</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'qop'</span><span class="p">)</span>
<span class="n">algorithm</span> <span class="o">=</span> <span class="n">chal</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'algorithm'</span><span class="p">,</span> <span class="s1">'MD5'</span><span class="p">)</span>
<span class="c1"># mod_digest doesn't send an opaque, even though it isn't</span>
<span class="c1"># supposed to be optional</span>
<span class="n">opaque</span> <span class="o">=</span> <span class="n">chal</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'opaque'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">H</span><span class="p">,</span> <span class="n">KD</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_algorithm_impls</span><span class="p">(</span><span class="n">algorithm</span><span class="p">)</span>
<span class="k">if</span> <span class="n">H</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="n">user</span><span class="p">,</span> <span class="n">pw</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="o">.</span><span class="n">find_user_password</span><span class="p">(</span><span class="n">realm</span><span class="p">,</span> <span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">)</span>
<span class="k">if</span> <span class="n">user</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="c1"># XXX not implemented yet</span>
<span class="k">if</span> <span class="n">req</span><span class="o">.</span><span class="n">data</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">entdig</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_entity_digest</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="n">chal</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">entdig</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">A1</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">pw</span><span class="p">)</span>
<span class="n">A2</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">get_method</span><span class="p">(),</span>
<span class="c1"># XXX selector: what about proxies and full urls</span>
<span class="n">req</span><span class="o">.</span><span class="n">selector</span><span class="p">)</span>
<span class="k">if</span> <span class="n">qop</span> <span class="o">==</span> <span class="s1">'auth'</span><span class="p">:</span>
<span class="k">if</span> <span class="n">nonce</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">last_nonce</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">nonce_count</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">nonce_count</span> <span class="o">=</span> <span class="mi">1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">last_nonce</span> <span class="o">=</span> <span class="n">nonce</span>
<span class="n">ncvalue</span> <span class="o">=</span> <span class="s1">'</span><span class="si">%08x</span><span class="s1">'</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">nonce_count</span>
<span class="n">cnonce</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_cnonce</span><span class="p">(</span><span class="n">nonce</span><span class="p">)</span>
<span class="n">noncebit</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">nonce</span><span class="p">,</span> <span class="n">ncvalue</span><span class="p">,</span> <span class="n">cnonce</span><span class="p">,</span> <span class="n">qop</span><span class="p">,</span> <span class="n">H</span><span class="p">(</span><span class="n">A2</span><span class="p">))</span>
<span class="n">respdig</span> <span class="o">=</span> <span class="n">KD</span><span class="p">(</span><span class="n">H</span><span class="p">(</span><span class="n">A1</span><span class="p">),</span> <span class="n">noncebit</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">qop</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">respdig</span> <span class="o">=</span> <span class="n">KD</span><span class="p">(</span><span class="n">H</span><span class="p">(</span><span class="n">A1</span><span class="p">),</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">nonce</span><span class="p">,</span> <span class="n">H</span><span class="p">(</span><span class="n">A2</span><span class="p">)))</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># XXX handle auth-int.</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s2">"qop '</span><span class="si">%s</span><span class="s2">' is not supported."</span> <span class="o">%</span> <span class="n">qop</span><span class="p">)</span>
<span class="c1"># XXX should the partial digests be encoded too?</span>
<span class="n">base</span> <span class="o">=</span> <span class="s1">'username="</span><span class="si">%s</span><span class="s1">", realm="</span><span class="si">%s</span><span class="s1">", nonce="</span><span class="si">%s</span><span class="s1">", uri="</span><span class="si">%s</span><span class="s1">", '</span> \
<span class="s1">'response="</span><span class="si">%s</span><span class="s1">"'</span> <span class="o">%</span> <span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">nonce</span><span class="p">,</span> <span class="n">req</span><span class="o">.</span><span class="n">selector</span><span class="p">,</span>
<span class="n">respdig</span><span class="p">)</span>
<span class="k">if</span> <span class="n">opaque</span><span class="p">:</span>
<span class="n">base</span> <span class="o">+=</span> <span class="s1">', opaque="</span><span class="si">%s</span><span class="s1">"'</span> <span class="o">%</span> <span class="n">opaque</span>
<span class="k">if</span> <span class="n">entdig</span><span class="p">:</span>
<span class="n">base</span> <span class="o">+=</span> <span class="s1">', digest="</span><span class="si">%s</span><span class="s1">"'</span> <span class="o">%</span> <span class="n">entdig</span>
<span class="n">base</span> <span class="o">+=</span> <span class="s1">', algorithm="</span><span class="si">%s</span><span class="s1">"'</span> <span class="o">%</span> <span class="n">algorithm</span>
<span class="k">if</span> <span class="n">qop</span><span class="p">:</span>
<span class="n">base</span> <span class="o">+=</span> <span class="s1">', qop=auth, nc=</span><span class="si">%s</span><span class="s1">, cnonce="</span><span class="si">%s</span><span class="s1">"'</span> <span class="o">%</span> <span class="p">(</span><span class="n">ncvalue</span><span class="p">,</span> <span class="n">cnonce</span><span class="p">)</span>
<span class="k">return</span> <span class="n">base</span>
<span class="k">def</span> <span class="nf">get_algorithm_impls</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">algorithm</span><span class="p">):</span>
<span class="c1"># lambdas assume digest modules are imported at the top level</span>
<span class="k">if</span> <span class="n">algorithm</span> <span class="o">==</span> <span class="s1">'MD5'</span><span class="p">:</span>
<span class="n">H</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">hashlib</span><span class="o">.</span><span class="n">md5</span><span class="p">(</span><span class="n">x</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s2">"ascii"</span><span class="p">))</span><span class="o">.</span><span class="n">hexdigest</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">algorithm</span> <span class="o">==</span> <span class="s1">'SHA'</span><span class="p">:</span>
<span class="n">H</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">hashlib</span><span class="o">.</span><span class="n">sha1</span><span class="p">(</span><span class="n">x</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s2">"ascii"</span><span class="p">))</span><span class="o">.</span><span class="n">hexdigest</span><span class="p">()</span>
<span class="c1"># XXX MD5-sess</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Unsupported digest authentication "</span>
<span class="s2">"algorithm </span><span class="si">%r</span><span class="s2">"</span> <span class="o">%</span> <span class="n">algorithm</span><span class="p">)</span>
<span class="n">KD</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">s</span><span class="p">,</span> <span class="n">d</span><span class="p">:</span> <span class="n">H</span><span class="p">(</span><span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">d</span><span class="p">))</span>
<span class="k">return</span> <span class="n">H</span><span class="p">,</span> <span class="n">KD</span>
<span class="k">def</span> <span class="nf">get_entity_digest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">chal</span><span class="p">):</span>
<span class="c1"># XXX not implemented yet</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">class</span> <span class="nc">HTTPDigestAuthHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">,</span> <span class="n">AbstractDigestAuthHandler</span><span class="p">):</span>
<span class="sd">"""An authentication protocol defined by RFC 2069</span>
<span class="sd"> Digest authentication improves on basic authentication because it</span>
<span class="sd"> does not transmit passwords in the clear.</span>
<span class="sd"> """</span>
<span class="n">auth_header</span> <span class="o">=</span> <span class="s1">'Authorization'</span>
<span class="n">handler_order</span> <span class="o">=</span> <span class="mi">490</span> <span class="c1"># before Basic auth</span>
<span class="k">def</span> <span class="nf">http_error_401</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span>
<span class="n">retry</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_auth_reqed</span><span class="p">(</span><span class="s1">'www-authenticate'</span><span class="p">,</span>
<span class="n">host</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">reset_retry_count</span><span class="p">()</span>
<span class="k">return</span> <span class="n">retry</span>
<span class="k">class</span> <span class="nc">ProxyDigestAuthHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">,</span> <span class="n">AbstractDigestAuthHandler</span><span class="p">):</span>
<span class="n">auth_header</span> <span class="o">=</span> <span class="s1">'Proxy-Authorization'</span>
<span class="n">handler_order</span> <span class="o">=</span> <span class="mi">490</span> <span class="c1"># before Basic auth</span>
<span class="k">def</span> <span class="nf">http_error_407</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">msg</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">host</span>
<span class="n">retry</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_auth_reqed</span><span class="p">(</span><span class="s1">'proxy-authenticate'</span><span class="p">,</span>
<span class="n">host</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">reset_retry_count</span><span class="p">()</span>
<span class="k">return</span> <span class="n">retry</span>
<span class="k">class</span> <span class="nc">AbstractHTTPHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">debuglevel</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_debuglevel</span> <span class="o">=</span> <span class="n">debuglevel</span>
<span class="k">def</span> <span class="nf">set_http_debuglevel</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">level</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_debuglevel</span> <span class="o">=</span> <span class="n">level</span>
<span class="k">def</span> <span class="nf">_get_content_length</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">):</span>
<span class="k">return</span> <span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="o">.</span><span class="n">HTTPConnection</span><span class="o">.</span><span class="n">_get_content_length</span><span class="p">(</span>
<span class="n">request</span><span class="o">.</span><span class="n">data</span><span class="p">,</span>
<span class="n">request</span><span class="o">.</span><span class="n">get_method</span><span class="p">())</span>
<span class="k">def</span> <span class="nf">do_request_</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">):</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">request</span><span class="o">.</span><span class="n">host</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">host</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'no host given'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">request</span><span class="o">.</span><span class="n">data</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> <span class="c1"># POST</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">request</span><span class="o">.</span><span class="n">data</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">data</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="n">msg</span> <span class="o">=</span> <span class="s2">"POST data should be bytes, an iterable of bytes, "</span> \
<span class="s2">"or a file object. It cannot be of type str."</span>
<span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">request</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="s1">'Content-type'</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span>
<span class="s1">'Content-type'</span><span class="p">,</span>
<span class="s1">'application/x-www-form-urlencoded'</span><span class="p">)</span>
<span class="k">if</span> <span class="p">(</span><span class="ow">not</span> <span class="n">request</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="s1">'Content-length'</span><span class="p">)</span>
<span class="ow">and</span> <span class="ow">not</span> <span class="n">request</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="s1">'Transfer-encoding'</span><span class="p">)):</span>
<span class="n">content_length</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_get_content_length</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
<span class="k">if</span> <span class="n">content_length</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">request</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span>
<span class="s1">'Content-length'</span><span class="p">,</span> <span class="nb">str</span><span class="p">(</span><span class="n">content_length</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">request</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span>
<span class="s1">'Transfer-encoding'</span><span class="p">,</span> <span class="s1">'chunked'</span><span class="p">)</span>
<span class="n">sel_host</span> <span class="o">=</span> <span class="n">host</span>
<span class="k">if</span> <span class="n">request</span><span class="o">.</span><span class="n">has_proxy</span><span class="p">():</span>
<span class="n">scheme</span><span class="p">,</span> <span class="n">sel</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">selector</span><span class="p">)</span>
<span class="n">sel_host</span><span class="p">,</span> <span class="n">sel_path</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">sel</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">request</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="s1">'Host'</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span><span class="s1">'Host'</span><span class="p">,</span> <span class="n">sel_host</span><span class="p">)</span>
<span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">parent</span><span class="o">.</span><span class="n">addheaders</span><span class="p">:</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">.</span><span class="n">capitalize</span><span class="p">()</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">request</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="n">name</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">add_unredirected_header</span><span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
<span class="k">return</span> <span class="n">request</span>
<span class="k">def</span> <span class="nf">do_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">http_class</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span> <span class="o">**</span><span class="n">http_conn_args</span><span class="p">):</span>
<span class="sd">"""Return an HTTPResponse object for the request, using http_class.</span>
<span class="sd"> http_class must implement the HTTPConnection API from http.client.</span>
<span class="sd"> """</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">host</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">host</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'no host given'</span><span class="p">)</span>
<span class="c1"># will parse host:port</span>
<span class="n">h</span> <span class="o">=</span> <span class="n">http_class</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="n">req</span><span class="o">.</span><span class="n">timeout</span><span class="p">,</span> <span class="o">**</span><span class="n">http_conn_args</span><span class="p">)</span>
<span class="n">h</span><span class="o">.</span><span class="n">set_debuglevel</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_debuglevel</span><span class="p">)</span>
<span class="n">headers</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">unredirected_hdrs</span><span class="p">)</span>
<span class="n">headers</span><span class="o">.</span><span class="n">update</span><span class="p">({</span><span class="n">k</span><span class="p">:</span> <span class="n">v</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">req</span><span class="o">.</span><span class="n">headers</span><span class="o">.</span><span class="n">items</span><span class="p">()</span>
<span class="k">if</span> <span class="n">k</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">})</span>
<span class="c1"># TODO(jhylton): Should this be redesigned to handle</span>
<span class="c1"># persistent connections?</span>
<span class="c1"># We want to make an HTTP/1.1 request, but the addinfourl</span>
<span class="c1"># class isn't prepared to deal with a persistent connection.</span>
<span class="c1"># It will try to read all remaining data from the socket,</span>
<span class="c1"># which will block while the server waits for the next request.</span>
<span class="c1"># So make sure the connection gets closed after the (only)</span>
<span class="c1"># request.</span>
<span class="n">headers</span><span class="p">[</span><span class="s2">"Connection"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"close"</span>
<span class="n">headers</span> <span class="o">=</span> <span class="p">{</span><span class="n">name</span><span class="o">.</span><span class="n">title</span><span class="p">():</span> <span class="n">val</span> <span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">val</span> <span class="ow">in</span> <span class="n">headers</span><span class="o">.</span><span class="n">items</span><span class="p">()}</span>
<span class="k">if</span> <span class="n">req</span><span class="o">.</span><span class="n">_tunnel_host</span><span class="p">:</span>
<span class="n">tunnel_headers</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">proxy_auth_hdr</span> <span class="o">=</span> <span class="s2">"Proxy-Authorization"</span>
<span class="k">if</span> <span class="n">proxy_auth_hdr</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">tunnel_headers</span><span class="p">[</span><span class="n">proxy_auth_hdr</span><span class="p">]</span> <span class="o">=</span> <span class="n">headers</span><span class="p">[</span><span class="n">proxy_auth_hdr</span><span class="p">]</span>
<span class="c1"># Proxy-Authorization should not be sent to origin</span>
<span class="c1"># server.</span>
<span class="k">del</span> <span class="n">headers</span><span class="p">[</span><span class="n">proxy_auth_hdr</span><span class="p">]</span>
<span class="n">h</span><span class="o">.</span><span class="n">set_tunnel</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">_tunnel_host</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="n">tunnel_headers</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">h</span><span class="o">.</span><span class="n">request</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">get_method</span><span class="p">(),</span> <span class="n">req</span><span class="o">.</span><span class="n">selector</span><span class="p">,</span> <span class="n">req</span><span class="o">.</span><span class="n">data</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span>
<span class="n">encode_chunked</span><span class="o">=</span><span class="n">req</span><span class="o">.</span><span class="n">has_header</span><span class="p">(</span><span class="s1">'Transfer-encoding'</span><span class="p">))</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">err</span><span class="p">:</span> <span class="c1"># timeout error</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="n">err</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="n">h</span><span class="o">.</span><span class="n">getresponse</span><span class="p">()</span>
<span class="k">except</span><span class="p">:</span>
<span class="n">h</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">raise</span>
<span class="c1"># If the server does not send us a 'Connection: close' header,</span>
<span class="c1"># HTTPConnection assumes the socket should be left open. Manually</span>
<span class="c1"># mark the socket to be closed when this response object goes away.</span>
<span class="k">if</span> <span class="n">h</span><span class="o">.</span><span class="n">sock</span><span class="p">:</span>
<span class="n">h</span><span class="o">.</span><span class="n">sock</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="n">h</span><span class="o">.</span><span class="n">sock</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">r</span><span class="o">.</span><span class="n">url</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">get_full_url</span><span class="p">()</span>
<span class="c1"># This line replaces the .msg attribute of the HTTPResponse</span>
<span class="c1"># with .headers, because urllib clients expect the response to</span>
<span class="c1"># have the reason in .msg. It would be good to mark this</span>
<span class="c1"># attribute is deprecated and get then to use info() or</span>
<span class="c1"># .headers.</span>
<span class="n">r</span><span class="o">.</span><span class="n">msg</span> <span class="o">=</span> <span class="n">r</span><span class="o">.</span><span class="n">reason</span>
<span class="k">return</span> <span class="n">r</span>
<span class="k">class</span> <span class="nc">HTTPHandler</span><span class="p">(</span><span class="n">AbstractHTTPHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">http_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">do_open</span><span class="p">(</span><span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="o">.</span><span class="n">HTTPConnection</span><span class="p">,</span> <span class="n">req</span><span class="p">)</span>
<span class="n">http_request</span> <span class="o">=</span> <span class="n">AbstractHTTPHandler</span><span class="o">.</span><span class="n">do_request_</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="p">,</span> <span class="s1">'HTTPSConnection'</span><span class="p">):</span>
<span class="k">class</span> <span class="nc">HTTPSHandler</span><span class="p">(</span><span class="n">AbstractHTTPHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">debuglevel</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">check_hostname</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">AbstractHTTPHandler</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">debuglevel</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_context</span> <span class="o">=</span> <span class="n">context</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_check_hostname</span> <span class="o">=</span> <span class="n">check_hostname</span>
<span class="k">def</span> <span class="nf">https_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">do_open</span><span class="p">(</span><span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="o">.</span><span class="n">HTTPSConnection</span><span class="p">,</span> <span class="n">req</span><span class="p">,</span>
<span class="n">context</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_context</span><span class="p">,</span> <span class="n">check_hostname</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_check_hostname</span><span class="p">)</span>
<span class="n">https_request</span> <span class="o">=</span> <span class="n">AbstractHTTPHandler</span><span class="o">.</span><span class="n">do_request_</span>
<span class="n">__all__</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'HTTPSHandler'</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">HTTPCookieProcessor</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">cookiejar</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="kn">import</span> <span class="nn">http.cookiejar</span>
<span class="k">if</span> <span class="n">cookiejar</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">cookiejar</span> <span class="o">=</span> <span class="n">http</span><span class="o">.</span><span class="n">cookiejar</span><span class="o">.</span><span class="n">CookieJar</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cookiejar</span> <span class="o">=</span> <span class="n">cookiejar</span>
<span class="k">def</span> <span class="nf">http_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cookiejar</span><span class="o">.</span><span class="n">add_cookie_header</span><span class="p">(</span><span class="n">request</span><span class="p">)</span>
<span class="k">return</span> <span class="n">request</span>
<span class="k">def</span> <span class="nf">http_response</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">,</span> <span class="n">response</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cookiejar</span><span class="o">.</span><span class="n">extract_cookies</span><span class="p">(</span><span class="n">response</span><span class="p">,</span> <span class="n">request</span><span class="p">)</span>
<span class="k">return</span> <span class="n">response</span>
<span class="n">https_request</span> <span class="o">=</span> <span class="n">http_request</span>
<span class="n">https_response</span> <span class="o">=</span> <span class="n">http_response</span>
<span class="k">class</span> <span class="nc">UnknownHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">unknown_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="nb">type</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">type</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'unknown url type: </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="nb">type</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">parse_keqv_list</span><span class="p">(</span><span class="n">l</span><span class="p">):</span>
<span class="sd">"""Parse list of key=value strings where keys are not duplicated."""</span>
<span class="n">parsed</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">for</span> <span class="n">elt</span> <span class="ow">in</span> <span class="n">l</span><span class="p">:</span>
<span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="o">=</span> <span class="n">elt</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'='</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">if</span> <span class="n">v</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'"'</span> <span class="ow">and</span> <span class="n">v</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'"'</span><span class="p">:</span>
<span class="n">v</span> <span class="o">=</span> <span class="n">v</span><span class="p">[</span><span class="mi">1</span><span class="p">:</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
<span class="n">parsed</span><span class="p">[</span><span class="n">k</span><span class="p">]</span> <span class="o">=</span> <span class="n">v</span>
<span class="k">return</span> <span class="n">parsed</span>
<span class="k">def</span> <span class="nf">parse_http_list</span><span class="p">(</span><span class="n">s</span><span class="p">):</span>
<span class="sd">"""Parse lists as described by RFC 2068 Section 2.</span>
<span class="sd"> In particular, parse comma-separated lists where the elements of</span>
<span class="sd"> the list may include quoted-strings. A quoted-string could</span>
<span class="sd"> contain a comma. A non-quoted string could have quotes in the</span>
<span class="sd"> middle. Neither commas nor quotes count if they are escaped.</span>
<span class="sd"> Only double-quotes count, not single-quotes.</span>
<span class="sd"> """</span>
<span class="n">res</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">part</span> <span class="o">=</span> <span class="s1">''</span>
<span class="n">escape</span> <span class="o">=</span> <span class="n">quote</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">for</span> <span class="n">cur</span> <span class="ow">in</span> <span class="n">s</span><span class="p">:</span>
<span class="k">if</span> <span class="n">escape</span><span class="p">:</span>
<span class="n">part</span> <span class="o">+=</span> <span class="n">cur</span>
<span class="n">escape</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">continue</span>
<span class="k">if</span> <span class="n">quote</span><span class="p">:</span>
<span class="k">if</span> <span class="n">cur</span> <span class="o">==</span> <span class="s1">'</span><span class="se">\\</span><span class="s1">'</span><span class="p">:</span>
<span class="n">escape</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">continue</span>
<span class="k">elif</span> <span class="n">cur</span> <span class="o">==</span> <span class="s1">'"'</span><span class="p">:</span>
<span class="n">quote</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">part</span> <span class="o">+=</span> <span class="n">cur</span>
<span class="k">continue</span>
<span class="k">if</span> <span class="n">cur</span> <span class="o">==</span> <span class="s1">','</span><span class="p">:</span>
<span class="n">res</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">part</span><span class="p">)</span>
<span class="n">part</span> <span class="o">=</span> <span class="s1">''</span>
<span class="k">continue</span>
<span class="k">if</span> <span class="n">cur</span> <span class="o">==</span> <span class="s1">'"'</span><span class="p">:</span>
<span class="n">quote</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">part</span> <span class="o">+=</span> <span class="n">cur</span>
<span class="c1"># append last part</span>
<span class="k">if</span> <span class="n">part</span><span class="p">:</span>
<span class="n">res</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">part</span><span class="p">)</span>
<span class="k">return</span> <span class="p">[</span><span class="n">part</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span> <span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">res</span><span class="p">]</span>
<span class="k">class</span> <span class="nc">FileHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="c1"># Use local file or FTP depending on form of URL</span>
<span class="k">def</span> <span class="nf">file_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">selector</span>
<span class="k">if</span> <span class="n">url</span><span class="p">[:</span><span class="mi">2</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'//'</span> <span class="ow">and</span> <span class="n">url</span><span class="p">[</span><span class="mi">2</span><span class="p">:</span><span class="mi">3</span><span class="p">]</span> <span class="o">!=</span> <span class="s1">'/'</span> <span class="ow">and</span> <span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">host</span> <span class="ow">and</span>
<span class="n">req</span><span class="o">.</span><span class="n">host</span> <span class="o">!=</span> <span class="s1">'localhost'</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">req</span><span class="o">.</span><span class="n">host</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_names</span><span class="p">():</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s2">"file:// scheme is supported only on localhost"</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open_local_file</span><span class="p">(</span><span class="n">req</span><span class="p">)</span>
<span class="c1"># names for the localhost</span>
<span class="n">names</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">get_names</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="n">FileHandler</span><span class="o">.</span><span class="n">names</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">FileHandler</span><span class="o">.</span><span class="n">names</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span>
<span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname_ex</span><span class="p">(</span><span class="s1">'localhost'</span><span class="p">)[</span><span class="mi">2</span><span class="p">]</span> <span class="o">+</span>
<span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname_ex</span><span class="p">(</span><span class="n">socket</span><span class="o">.</span><span class="n">gethostname</span><span class="p">())[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">except</span> <span class="n">socket</span><span class="o">.</span><span class="n">gaierror</span><span class="p">:</span>
<span class="n">FileHandler</span><span class="o">.</span><span class="n">names</span> <span class="o">=</span> <span class="p">(</span><span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="s1">'localhost'</span><span class="p">),)</span>
<span class="k">return</span> <span class="n">FileHandler</span><span class="o">.</span><span class="n">names</span>
<span class="c1"># not entirely sure what the rules are here</span>
<span class="k">def</span> <span class="nf">open_local_file</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="kn">import</span> <span class="nn">email.utils</span>
<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">host</span>
<span class="n">filename</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">selector</span>
<span class="n">localfile</span> <span class="o">=</span> <span class="n">url2pathname</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">stats</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">stat</span><span class="p">(</span><span class="n">localfile</span><span class="p">)</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">stats</span><span class="o">.</span><span class="n">st_size</span>
<span class="n">modified</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">utils</span><span class="o">.</span><span class="n">formatdate</span><span class="p">(</span><span class="n">stats</span><span class="o">.</span><span class="n">st_mtime</span><span class="p">,</span> <span class="n">usegmt</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">mtype</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_type</span><span class="p">(</span><span class="n">filename</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_string</span><span class="p">(</span>
<span class="s1">'Content-type: </span><span class="si">%s</span><span class="se">\n</span><span class="s1">Content-length: </span><span class="si">%d</span><span class="se">\n</span><span class="s1">Last-modified: </span><span class="si">%s</span><span class="se">\n</span><span class="s1">'</span> <span class="o">%</span>
<span class="p">(</span><span class="n">mtype</span> <span class="ow">or</span> <span class="s1">'text/plain'</span><span class="p">,</span> <span class="n">size</span><span class="p">,</span> <span class="n">modified</span><span class="p">))</span>
<span class="k">if</span> <span class="n">host</span><span class="p">:</span>
<span class="n">host</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">host</span> <span class="ow">or</span> \
<span class="p">(</span><span class="ow">not</span> <span class="n">port</span> <span class="ow">and</span> <span class="n">_safe_gethostbyname</span><span class="p">(</span><span class="n">host</span><span class="p">)</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_names</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">host</span><span class="p">:</span>
<span class="n">origurl</span> <span class="o">=</span> <span class="s1">'file://'</span> <span class="o">+</span> <span class="n">host</span> <span class="o">+</span> <span class="n">filename</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">origurl</span> <span class="o">=</span> <span class="s1">'file://'</span> <span class="o">+</span> <span class="n">filename</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="nb">open</span><span class="p">(</span><span class="n">localfile</span><span class="p">,</span> <span class="s1">'rb'</span><span class="p">),</span> <span class="n">headers</span><span class="p">,</span> <span class="n">origurl</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exp</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="n">exp</span><span class="p">)</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'file not on local host'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_safe_gethostbyname</span><span class="p">(</span><span class="n">host</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">return</span> <span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">except</span> <span class="n">socket</span><span class="o">.</span><span class="n">gaierror</span><span class="p">:</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">class</span> <span class="nc">FTPHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">ftp_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="kn">import</span> <span class="nn">ftplib</span>
<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">host</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">host</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'ftp error: no host given'</span><span class="p">)</span>
<span class="n">host</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">if</span> <span class="n">port</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">port</span> <span class="o">=</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">FTP_PORT</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">port</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">port</span><span class="p">)</span>
<span class="c1"># username/password handling</span>
<span class="n">user</span><span class="p">,</span> <span class="n">host</span> <span class="o">=</span> <span class="n">splituser</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">if</span> <span class="n">user</span><span class="p">:</span>
<span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="n">splitpasswd</span><span class="p">(</span><span class="n">user</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">passwd</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="n">user</span> <span class="o">=</span> <span class="n">user</span> <span class="ow">or</span> <span class="s1">''</span>
<span class="n">passwd</span> <span class="o">=</span> <span class="n">passwd</span> <span class="ow">or</span> <span class="s1">''</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">msg</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="n">path</span><span class="p">,</span> <span class="n">attrs</span> <span class="o">=</span> <span class="n">splitattr</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">selector</span><span class="p">)</span>
<span class="n">dirs</span> <span class="o">=</span> <span class="n">path</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'/'</span><span class="p">)</span>
<span class="n">dirs</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="n">unquote</span><span class="p">,</span> <span class="n">dirs</span><span class="p">))</span>
<span class="n">dirs</span><span class="p">,</span> <span class="n">file</span> <span class="o">=</span> <span class="n">dirs</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">dirs</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
<span class="k">if</span> <span class="n">dirs</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">dirs</span><span class="p">[</span><span class="mi">0</span><span class="p">]:</span>
<span class="n">dirs</span> <span class="o">=</span> <span class="n">dirs</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">fw</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">connect_ftp</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">dirs</span><span class="p">,</span> <span class="n">req</span><span class="o">.</span><span class="n">timeout</span><span class="p">)</span>
<span class="nb">type</span> <span class="o">=</span> <span class="n">file</span> <span class="ow">and</span> <span class="s1">'I'</span> <span class="ow">or</span> <span class="s1">'D'</span>
<span class="k">for</span> <span class="n">attr</span> <span class="ow">in</span> <span class="n">attrs</span><span class="p">:</span>
<span class="n">attr</span><span class="p">,</span> <span class="n">value</span> <span class="o">=</span> <span class="n">splitvalue</span><span class="p">(</span><span class="n">attr</span><span class="p">)</span>
<span class="k">if</span> <span class="n">attr</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'type'</span> <span class="ow">and</span> \
<span class="n">value</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'a'</span><span class="p">,</span> <span class="s1">'A'</span><span class="p">,</span> <span class="s1">'i'</span><span class="p">,</span> <span class="s1">'I'</span><span class="p">,</span> <span class="s1">'d'</span><span class="p">,</span> <span class="s1">'D'</span><span class="p">):</span>
<span class="nb">type</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span>
<span class="n">fp</span><span class="p">,</span> <span class="n">retrlen</span> <span class="o">=</span> <span class="n">fw</span><span class="o">.</span><span class="n">retrfile</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="nb">type</span><span class="p">)</span>
<span class="n">headers</span> <span class="o">=</span> <span class="s2">""</span>
<span class="n">mtype</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_type</span><span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">mtype</span><span class="p">:</span>
<span class="n">headers</span> <span class="o">+=</span> <span class="s2">"Content-type: </span><span class="si">%s</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="n">mtype</span>
<span class="k">if</span> <span class="n">retrlen</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">retrlen</span> <span class="o">>=</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">headers</span> <span class="o">+=</span> <span class="s2">"Content-length: </span><span class="si">%d</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="n">retrlen</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_string</span><span class="p">(</span><span class="n">headers</span><span class="p">)</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">req</span><span class="o">.</span><span class="n">full_url</span><span class="p">)</span>
<span class="k">except</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">all_errors</span> <span class="k">as</span> <span class="n">exp</span><span class="p">:</span>
<span class="n">exc</span> <span class="o">=</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'ftp error: </span><span class="si">%r</span><span class="s1">'</span> <span class="o">%</span> <span class="n">exp</span><span class="p">)</span>
<span class="k">raise</span> <span class="n">exc</span><span class="o">.</span><span class="n">with_traceback</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">def</span> <span class="nf">connect_ftp</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">dirs</span><span class="p">,</span> <span class="n">timeout</span><span class="p">):</span>
<span class="k">return</span> <span class="n">ftpwrapper</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">dirs</span><span class="p">,</span> <span class="n">timeout</span><span class="p">,</span>
<span class="n">persistent</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">CacheFTPHandler</span><span class="p">(</span><span class="n">FTPHandler</span><span class="p">):</span>
<span class="c1"># XXX would be nice to have pluggable cache strategies</span>
<span class="c1"># XXX this stuff is definitely not thread safe</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cache</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">soonest</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">delay</span> <span class="o">=</span> <span class="mi">60</span>
<span class="bp">self</span><span class="o">.</span><span class="n">max_conns</span> <span class="o">=</span> <span class="mi">16</span>
<span class="k">def</span> <span class="nf">setTimeout</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">t</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">delay</span> <span class="o">=</span> <span class="n">t</span>
<span class="k">def</span> <span class="nf">setMaxConns</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">m</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">max_conns</span> <span class="o">=</span> <span class="n">m</span>
<span class="k">def</span> <span class="nf">connect_ftp</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">dirs</span><span class="p">,</span> <span class="n">timeout</span><span class="p">):</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">user</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="s1">'/'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">dirs</span><span class="p">),</span> <span class="n">timeout</span>
<span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">delay</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">ftpwrapper</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span>
<span class="n">dirs</span><span class="p">,</span> <span class="n">timeout</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">delay</span>
<span class="bp">self</span><span class="o">.</span><span class="n">check_cache</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">check_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># first check for old ones</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">soonest</span> <span class="o"><=</span> <span class="n">t</span><span class="p">:</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="o">.</span><span class="n">items</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">v</span> <span class="o"><</span> <span class="n">t</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="p">[</span><span class="n">k</span><span class="p">]</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">soonest</span> <span class="o">=</span> <span class="nb">min</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="o">.</span><span class="n">values</span><span class="p">()))</span>
<span class="c1"># then check the size</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="p">)</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">max_conns</span><span class="p">:</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="o">.</span><span class="n">items</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">v</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">soonest</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="k">break</span>
<span class="bp">self</span><span class="o">.</span><span class="n">soonest</span> <span class="o">=</span> <span class="nb">min</span><span class="p">(</span><span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="o">.</span><span class="n">values</span><span class="p">()))</span>
<span class="k">def</span> <span class="nf">clear_cache</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">for</span> <span class="n">conn</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
<span class="n">conn</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cache</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="k">class</span> <span class="nc">DataHandler</span><span class="p">(</span><span class="n">BaseHandler</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">data_open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">req</span><span class="p">):</span>
<span class="c1"># data URLs as specified in RFC 2397.</span>
<span class="c1">#</span>
<span class="c1"># ignores POSTed data</span>
<span class="c1">#</span>
<span class="c1"># syntax:</span>
<span class="c1"># dataurl := "data:" [ mediatype ] [ ";base64" ] "," data</span>
<span class="c1"># mediatype := [ type "/" subtype ] *( ";" parameter )</span>
<span class="c1"># data := *urlchar</span>
<span class="c1"># parameter := attribute "=" value</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">full_url</span>
<span class="n">scheme</span><span class="p">,</span> <span class="n">data</span> <span class="o">=</span> <span class="n">url</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">":"</span><span class="p">,</span><span class="mi">1</span><span class="p">)</span>
<span class="n">mediatype</span><span class="p">,</span> <span class="n">data</span> <span class="o">=</span> <span class="n">data</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s2">","</span><span class="p">,</span><span class="mi">1</span><span class="p">)</span>
<span class="c1"># even base64 encoded data URLs might be quoted so unquote in any case:</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">unquote_to_bytes</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="k">if</span> <span class="n">mediatype</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="s2">";base64"</span><span class="p">):</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">base64</span><span class="o">.</span><span class="n">decodebytes</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="n">mediatype</span> <span class="o">=</span> <span class="n">mediatype</span><span class="p">[:</span><span class="o">-</span><span class="mi">7</span><span class="p">]</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">mediatype</span><span class="p">:</span>
<span class="n">mediatype</span> <span class="o">=</span> <span class="s2">"text/plain;charset=US-ASCII"</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_string</span><span class="p">(</span><span class="s2">"Content-type: </span><span class="si">%s</span><span class="se">\n</span><span class="s2">Content-length: </span><span class="si">%d</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span>
<span class="p">(</span><span class="n">mediatype</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">data</span><span class="p">)))</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="n">io</span><span class="o">.</span><span class="n">BytesIO</span><span class="p">(</span><span class="n">data</span><span class="p">),</span> <span class="n">headers</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span>
<span class="c1"># Code move from the old urllib module</span>
<span class="n">MAXFTPCACHE</span> <span class="o">=</span> <span class="mi">10</span> <span class="c1"># Trim the ftp cache beyond this size</span>
<span class="c1"># Helper for non-unix systems</span>
<span class="k">if</span> <span class="n">os</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="s1">'nt'</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">nturl2path</span> <span class="k">import</span> <span class="n">url2pathname</span><span class="p">,</span> <span class="n">pathname2url</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">url2pathname</span><span class="p">(</span><span class="n">pathname</span><span class="p">):</span>
<span class="sd">"""OS-specific conversion from a relative URL of the 'file' scheme</span>
<span class="sd"> to a file system path; not recommended for general use."""</span>
<span class="k">return</span> <span class="n">unquote</span><span class="p">(</span><span class="n">pathname</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">pathname2url</span><span class="p">(</span><span class="n">pathname</span><span class="p">):</span>
<span class="sd">"""OS-specific conversion from a file system path to a relative URL</span>
<span class="sd"> of the 'file' scheme; not recommended for general use."""</span>
<span class="k">return</span> <span class="n">quote</span><span class="p">(</span><span class="n">pathname</span><span class="p">)</span>
<span class="n">ftpcache</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">class</span> <span class="nc">URLopener</span><span class="p">:</span>
<span class="sd">"""Class to open URLs.</span>
<span class="sd"> This is a class rather than just a subroutine because we may need</span>
<span class="sd"> more than one set of global protocol-specific options.</span>
<span class="sd"> Note -- this is a base class for those who don't want the</span>
<span class="sd"> automatic handling of errors type 302 (relocated) and 401</span>
<span class="sd"> (authorization needed)."""</span>
<span class="n">__tempfiles</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">version</span> <span class="o">=</span> <span class="s2">"Python-urllib/</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">__version__</span>
<span class="c1"># Constructor</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">proxies</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">x509</span><span class="p">):</span>
<span class="n">msg</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%(class)s</span><span class="s2"> style of invoking requests is deprecated. "</span> \
<span class="s2">"Use newer urlopen functions/methods"</span> <span class="o">%</span> <span class="p">{</span><span class="s1">'class'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">}</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="n">msg</span><span class="p">,</span> <span class="ne">DeprecationWarning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
<span class="k">if</span> <span class="n">proxies</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">proxies</span> <span class="o">=</span> <span class="n">getproxies</span><span class="p">()</span>
<span class="k">assert</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">proxies</span><span class="p">,</span> <span class="s1">'keys'</span><span class="p">),</span> <span class="s2">"proxies must be a mapping"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">proxies</span> <span class="o">=</span> <span class="n">proxies</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_file</span> <span class="o">=</span> <span class="n">x509</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'key_file'</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cert_file</span> <span class="o">=</span> <span class="n">x509</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'cert_file'</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">addheaders</span> <span class="o">=</span> <span class="p">[(</span><span class="s1">'User-Agent'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">version</span><span class="p">),</span> <span class="p">(</span><span class="s1">'Accept'</span><span class="p">,</span> <span class="s1">'*/*'</span><span class="p">)]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__tempfiles</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__unlink</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">unlink</span> <span class="c1"># See cleanup()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Undocumented feature: if you assign {} to tempcache,</span>
<span class="c1"># it is used to cache files retrieved with</span>
<span class="c1"># self.retrieve(). This is not enabled by default</span>
<span class="c1"># since it does not work for changing documents (and I</span>
<span class="c1"># haven't got the logic to check expiration headers</span>
<span class="c1"># yet).</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span> <span class="o">=</span> <span class="n">ftpcache</span>
<span class="c1"># Undocumented feature: you can use a different</span>
<span class="c1"># ftp cache by assigning to the .ftpcache member;</span>
<span class="c1"># in case you want logically independent URL openers</span>
<span class="c1"># XXX This is not threadsafe. Bah.</span>
<span class="k">def</span> <span class="nf">__del__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">close</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cleanup</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">cleanup</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># This code sometimes runs when the rest of this module</span>
<span class="c1"># has already been deleted, so it can't use any globals</span>
<span class="c1"># or import anything.</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__tempfiles</span><span class="p">:</span>
<span class="k">for</span> <span class="n">file</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">__tempfiles</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__unlink</span><span class="p">(</span><span class="n">file</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">__tempfiles</span><span class="p">[:]</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">addheader</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="sd">"""Add a header to be used by the HTTP interface only</span>
<span class="sd"> e.g. u.addheader('Accept', 'sound/basic')"""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">addheaders</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">args</span><span class="p">)</span>
<span class="c1"># External interface</span>
<span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fullurl</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Use URLopener().open(file) instead of open(file, 'r')."""</span>
<span class="n">fullurl</span> <span class="o">=</span> <span class="n">unwrap</span><span class="p">(</span><span class="n">to_bytes</span><span class="p">(</span><span class="n">fullurl</span><span class="p">))</span>
<span class="n">fullurl</span> <span class="o">=</span> <span class="n">quote</span><span class="p">(</span><span class="n">fullurl</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s2">"%/:=&?~#+!$,;'@()*[]|"</span><span class="p">)</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span> <span class="ow">and</span> <span class="n">fullurl</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span><span class="p">:</span>
<span class="n">filename</span><span class="p">,</span> <span class="n">headers</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span><span class="p">[</span><span class="n">fullurl</span><span class="p">]</span>
<span class="n">fp</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s1">'rb'</span><span class="p">)</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">fullurl</span><span class="p">)</span>
<span class="n">urltype</span><span class="p">,</span> <span class="n">url</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">fullurl</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">urltype</span><span class="p">:</span>
<span class="n">urltype</span> <span class="o">=</span> <span class="s1">'file'</span>
<span class="k">if</span> <span class="n">urltype</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">proxies</span><span class="p">:</span>
<span class="n">proxy</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">proxies</span><span class="p">[</span><span class="n">urltype</span><span class="p">]</span>
<span class="n">urltype</span><span class="p">,</span> <span class="n">proxyhost</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">proxy</span><span class="p">)</span>
<span class="n">host</span><span class="p">,</span> <span class="n">selector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">proxyhost</span><span class="p">)</span>
<span class="n">url</span> <span class="o">=</span> <span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">fullurl</span><span class="p">)</span> <span class="c1"># Signal special case to open_*()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">proxy</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">name</span> <span class="o">=</span> <span class="s1">'open_'</span> <span class="o">+</span> <span class="n">urltype</span>
<span class="bp">self</span><span class="o">.</span><span class="n">type</span> <span class="o">=</span> <span class="n">urltype</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">'-'</span><span class="p">,</span> <span class="s1">'_'</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="k">if</span> <span class="n">proxy</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open_unknown_proxy</span><span class="p">(</span><span class="n">proxy</span><span class="p">,</span> <span class="n">fullurl</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open_unknown</span><span class="p">(</span><span class="n">fullurl</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">)(</span><span class="n">url</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">)(</span><span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">except</span> <span class="p">(</span><span class="n">HTTPError</span><span class="p">,</span> <span class="n">URLError</span><span class="p">):</span>
<span class="k">raise</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">msg</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">OSError</span><span class="p">(</span><span class="s1">'socket error'</span><span class="p">,</span> <span class="n">msg</span><span class="p">)</span><span class="o">.</span><span class="n">with_traceback</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">def</span> <span class="nf">open_unknown</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fullurl</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Overridable interface to open unknown URL type."""</span>
<span class="nb">type</span><span class="p">,</span> <span class="n">url</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">fullurl</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">OSError</span><span class="p">(</span><span class="s1">'url error'</span><span class="p">,</span> <span class="s1">'unknown url type'</span><span class="p">,</span> <span class="nb">type</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">open_unknown_proxy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">proxy</span><span class="p">,</span> <span class="n">fullurl</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Overridable interface to open unknown URL type."""</span>
<span class="nb">type</span><span class="p">,</span> <span class="n">url</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">fullurl</span><span class="p">)</span>
<span class="k">raise</span> <span class="ne">OSError</span><span class="p">(</span><span class="s1">'url error'</span><span class="p">,</span> <span class="s1">'invalid proxy for </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="nb">type</span><span class="p">,</span> <span class="n">proxy</span><span class="p">)</span>
<span class="c1"># External interface</span>
<span class="k">def</span> <span class="nf">retrieve</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">filename</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">reporthook</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""retrieve(url) returns (filename, headers) for a local object</span>
<span class="sd"> or (tempfilename, headers) for a remote object."""</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">unwrap</span><span class="p">(</span><span class="n">to_bytes</span><span class="p">(</span><span class="n">url</span><span class="p">))</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span> <span class="ow">and</span> <span class="n">url</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span><span class="p">[</span><span class="n">url</span><span class="p">]</span>
<span class="nb">type</span><span class="p">,</span> <span class="n">url1</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="k">if</span> <span class="n">filename</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">and</span> <span class="p">(</span><span class="ow">not</span> <span class="nb">type</span> <span class="ow">or</span> <span class="nb">type</span> <span class="o">==</span> <span class="s1">'file'</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">fp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">open_local_file</span><span class="p">(</span><span class="n">url1</span><span class="p">)</span>
<span class="n">hdrs</span> <span class="o">=</span> <span class="n">fp</span><span class="o">.</span><span class="n">info</span><span class="p">()</span>
<span class="n">fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">return</span> <span class="n">url2pathname</span><span class="p">(</span><span class="n">splithost</span><span class="p">(</span><span class="n">url1</span><span class="p">)[</span><span class="mi">1</span><span class="p">]),</span> <span class="n">hdrs</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">msg</span><span class="p">:</span>
<span class="k">pass</span>
<span class="n">fp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">fp</span><span class="o">.</span><span class="n">info</span><span class="p">()</span>
<span class="k">if</span> <span class="n">filename</span><span class="p">:</span>
<span class="n">tfp</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">garbage</span><span class="p">,</span> <span class="n">path</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="n">garbage</span><span class="p">,</span> <span class="n">path</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">path</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">)</span>
<span class="n">path</span><span class="p">,</span> <span class="n">garbage</span> <span class="o">=</span> <span class="n">splitquery</span><span class="p">(</span><span class="n">path</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">)</span>
<span class="n">path</span><span class="p">,</span> <span class="n">garbage</span> <span class="o">=</span> <span class="n">splitattr</span><span class="p">(</span><span class="n">path</span> <span class="ow">or</span> <span class="s2">""</span><span class="p">)</span>
<span class="n">suffix</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">splitext</span><span class="p">(</span><span class="n">path</span><span class="p">)[</span><span class="mi">1</span><span class="p">]</span>
<span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span> <span class="o">=</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">mkstemp</span><span class="p">(</span><span class="n">suffix</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">__tempfiles</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="n">tfp</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">fdopen</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="s1">'wb'</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">filename</span><span class="p">,</span> <span class="n">headers</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tempcache</span><span class="p">[</span><span class="n">url</span><span class="p">]</span> <span class="o">=</span> <span class="n">result</span>
<span class="n">bs</span> <span class="o">=</span> <span class="mi">1024</span><span class="o">*</span><span class="mi">8</span>
<span class="n">size</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
<span class="n">read</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">blocknum</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="s2">"content-length"</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">size</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">headers</span><span class="p">[</span><span class="s2">"Content-Length"</span><span class="p">])</span>
<span class="k">if</span> <span class="n">reporthook</span><span class="p">:</span>
<span class="n">reporthook</span><span class="p">(</span><span class="n">blocknum</span><span class="p">,</span> <span class="n">bs</span><span class="p">,</span> <span class="n">size</span><span class="p">)</span>
<span class="k">while</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">block</span> <span class="o">=</span> <span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">bs</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">block</span><span class="p">:</span>
<span class="k">break</span>
<span class="n">read</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">block</span><span class="p">)</span>
<span class="n">tfp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">block</span><span class="p">)</span>
<span class="n">blocknum</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="n">reporthook</span><span class="p">:</span>
<span class="n">reporthook</span><span class="p">(</span><span class="n">blocknum</span><span class="p">,</span> <span class="n">bs</span><span class="p">,</span> <span class="n">size</span><span class="p">)</span>
<span class="k">finally</span><span class="p">:</span>
<span class="n">tfp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">finally</span><span class="p">:</span>
<span class="n">fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="c1"># raise exception if actual size does not match content-length header</span>
<span class="k">if</span> <span class="n">size</span> <span class="o">>=</span> <span class="mi">0</span> <span class="ow">and</span> <span class="n">read</span> <span class="o"><</span> <span class="n">size</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">ContentTooShortError</span><span class="p">(</span>
<span class="s2">"retrieval incomplete: got only </span><span class="si">%i</span><span class="s2"> out of </span><span class="si">%i</span><span class="s2"> bytes"</span>
<span class="o">%</span> <span class="p">(</span><span class="n">read</span><span class="p">,</span> <span class="n">size</span><span class="p">),</span> <span class="n">result</span><span class="p">)</span>
<span class="k">return</span> <span class="n">result</span>
<span class="c1"># Each method named open_<type> knows how to open that type of URL</span>
<span class="k">def</span> <span class="nf">_open_generic_http</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">connection_factory</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span>
<span class="sd">"""Make an HTTP connection using connection_class.</span>
<span class="sd"> This is an internal method that should be called from</span>
<span class="sd"> open_http() or open_https().</span>
<span class="sd"> Arguments:</span>
<span class="sd"> - connection_factory should take a host name and return an</span>
<span class="sd"> HTTPConnection instance.</span>
<span class="sd"> - url is the url to retrieval or a host, relative-path pair.</span>
<span class="sd"> - data is payload for a POST request or None.</span>
<span class="sd"> """</span>
<span class="n">user_passwd</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">proxy_passwd</span><span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="n">host</span><span class="p">,</span> <span class="n">selector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="k">if</span> <span class="n">host</span><span class="p">:</span>
<span class="n">user_passwd</span><span class="p">,</span> <span class="n">host</span> <span class="o">=</span> <span class="n">splituser</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="n">realhost</span> <span class="o">=</span> <span class="n">host</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">host</span><span class="p">,</span> <span class="n">selector</span> <span class="o">=</span> <span class="n">url</span>
<span class="c1"># check whether the proxy contains authorization information</span>
<span class="n">proxy_passwd</span><span class="p">,</span> <span class="n">host</span> <span class="o">=</span> <span class="n">splituser</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="c1"># now we proceed with the url we want to obtain</span>
<span class="n">urltype</span><span class="p">,</span> <span class="n">rest</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">selector</span><span class="p">)</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">rest</span>
<span class="n">user_passwd</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">urltype</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">!=</span> <span class="s1">'http'</span><span class="p">:</span>
<span class="n">realhost</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">realhost</span><span class="p">,</span> <span class="n">rest</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">rest</span><span class="p">)</span>
<span class="k">if</span> <span class="n">realhost</span><span class="p">:</span>
<span class="n">user_passwd</span><span class="p">,</span> <span class="n">realhost</span> <span class="o">=</span> <span class="n">splituser</span><span class="p">(</span><span class="n">realhost</span><span class="p">)</span>
<span class="k">if</span> <span class="n">user_passwd</span><span class="p">:</span>
<span class="n">selector</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">://</span><span class="si">%s%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">urltype</span><span class="p">,</span> <span class="n">realhost</span><span class="p">,</span> <span class="n">rest</span><span class="p">)</span>
<span class="k">if</span> <span class="n">proxy_bypass</span><span class="p">(</span><span class="n">realhost</span><span class="p">):</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">realhost</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">host</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">OSError</span><span class="p">(</span><span class="s1">'http error'</span><span class="p">,</span> <span class="s1">'no host given'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">proxy_passwd</span><span class="p">:</span>
<span class="n">proxy_passwd</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">proxy_passwd</span><span class="p">)</span>
<span class="n">proxy_auth</span> <span class="o">=</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="n">proxy_passwd</span><span class="o">.</span><span class="n">encode</span><span class="p">())</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">'ascii'</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">proxy_auth</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">user_passwd</span><span class="p">:</span>
<span class="n">user_passwd</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">user_passwd</span><span class="p">)</span>
<span class="n">auth</span> <span class="o">=</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="n">user_passwd</span><span class="o">.</span><span class="n">encode</span><span class="p">())</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">'ascii'</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">auth</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">http_conn</span> <span class="o">=</span> <span class="n">connection_factory</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="n">headers</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">if</span> <span class="n">proxy_auth</span><span class="p">:</span>
<span class="n">headers</span><span class="p">[</span><span class="s2">"Proxy-Authorization"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"Basic </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">proxy_auth</span>
<span class="k">if</span> <span class="n">auth</span><span class="p">:</span>
<span class="n">headers</span><span class="p">[</span><span class="s2">"Authorization"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"Basic </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">auth</span>
<span class="k">if</span> <span class="n">realhost</span><span class="p">:</span>
<span class="n">headers</span><span class="p">[</span><span class="s2">"Host"</span><span class="p">]</span> <span class="o">=</span> <span class="n">realhost</span>
<span class="c1"># Add Connection:close as we don't support persistent connections yet.</span>
<span class="c1"># This helps in closing the socket and avoiding ResourceWarning</span>
<span class="n">headers</span><span class="p">[</span><span class="s2">"Connection"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"close"</span>
<span class="k">for</span> <span class="n">header</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">addheaders</span><span class="p">:</span>
<span class="n">headers</span><span class="p">[</span><span class="n">header</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">headers</span><span class="p">[</span><span class="s2">"Content-Type"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"application/x-www-form-urlencoded"</span>
<span class="n">http_conn</span><span class="o">.</span><span class="n">request</span><span class="p">(</span><span class="s2">"POST"</span><span class="p">,</span> <span class="n">selector</span><span class="p">,</span> <span class="n">data</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">http_conn</span><span class="o">.</span><span class="n">request</span><span class="p">(</span><span class="s2">"GET"</span><span class="p">,</span> <span class="n">selector</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="n">headers</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">response</span> <span class="o">=</span> <span class="n">http_conn</span><span class="o">.</span><span class="n">getresponse</span><span class="p">()</span>
<span class="k">except</span> <span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="o">.</span><span class="n">BadStatusLine</span><span class="p">:</span>
<span class="c1"># something went wrong with the HTTP status line</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s2">"http protocol error: bad status line"</span><span class="p">)</span>
<span class="c1"># According to RFC 2616, "2xx" code indicates that the client's</span>
<span class="c1"># request was successfully received, understood, and accepted.</span>
<span class="k">if</span> <span class="mi">200</span> <span class="o"><=</span> <span class="n">response</span><span class="o">.</span><span class="n">status</span> <span class="o"><</span> <span class="mi">300</span><span class="p">:</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="n">response</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">msg</span><span class="p">,</span> <span class="s2">"http:"</span> <span class="o">+</span> <span class="n">url</span><span class="p">,</span>
<span class="n">response</span><span class="o">.</span><span class="n">status</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error</span><span class="p">(</span>
<span class="n">url</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">fp</span><span class="p">,</span>
<span class="n">response</span><span class="o">.</span><span class="n">status</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">reason</span><span class="p">,</span> <span class="n">response</span><span class="o">.</span><span class="n">msg</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">open_http</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Use HTTP protocol."""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_open_generic_http</span><span class="p">(</span><span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="o">.</span><span class="n">HTTPConnection</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Handle http errors.</span>
<span class="sd"> Derived class can override this, or provide specific handlers</span>
<span class="sd"> named http_error_DDD where DDD is the 3-digit error code."""</span>
<span class="c1"># First check if there's a specific handler for this error</span>
<span class="n">name</span> <span class="o">=</span> <span class="s1">'http_error_</span><span class="si">%d</span><span class="s1">'</span> <span class="o">%</span> <span class="n">errcode</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="n">method</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">method</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">result</span> <span class="o">=</span> <span class="n">method</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">if</span> <span class="n">result</span><span class="p">:</span> <span class="k">return</span> <span class="n">result</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="sd">"""Default error handler: close the connection and raise OSError."""</span>
<span class="n">fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">raise</span> <span class="n">HTTPError</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">_have_ssl</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">_https_connection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">host</span><span class="p">):</span>
<span class="k">return</span> <span class="n">http</span><span class="o">.</span><span class="n">client</span><span class="o">.</span><span class="n">HTTPSConnection</span><span class="p">(</span><span class="n">host</span><span class="p">,</span>
<span class="n">key_file</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">key_file</span><span class="p">,</span>
<span class="n">cert_file</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">cert_file</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">open_https</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Use HTTPS protocol."""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_open_generic_http</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_https_connection</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">open_file</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">):</span>
<span class="sd">"""Use local file or FTP depending on form of URL."""</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'file error: proxy support for file protocol currently not implemented'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">url</span><span class="p">[:</span><span class="mi">2</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'//'</span> <span class="ow">and</span> <span class="n">url</span><span class="p">[</span><span class="mi">2</span><span class="p">:</span><span class="mi">3</span><span class="p">]</span> <span class="o">!=</span> <span class="s1">'/'</span> <span class="ow">and</span> <span class="n">url</span><span class="p">[</span><span class="mi">2</span><span class="p">:</span><span class="mi">12</span><span class="p">]</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">!=</span> <span class="s1">'localhost/'</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"file:// scheme is supported only on localhost"</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open_local_file</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">open_local_file</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">):</span>
<span class="sd">"""Use local file."""</span>
<span class="kn">import</span> <span class="nn">email.utils</span>
<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="n">host</span><span class="p">,</span> <span class="n">file</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="n">localname</span> <span class="o">=</span> <span class="n">url2pathname</span><span class="p">(</span><span class="n">file</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">stats</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">stat</span><span class="p">(</span><span class="n">localname</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="n">e</span><span class="o">.</span><span class="n">strerror</span><span class="p">,</span> <span class="n">e</span><span class="o">.</span><span class="n">filename</span><span class="p">)</span>
<span class="n">size</span> <span class="o">=</span> <span class="n">stats</span><span class="o">.</span><span class="n">st_size</span>
<span class="n">modified</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">utils</span><span class="o">.</span><span class="n">formatdate</span><span class="p">(</span><span class="n">stats</span><span class="o">.</span><span class="n">st_mtime</span><span class="p">,</span> <span class="n">usegmt</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="n">mtype</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_type</span><span class="p">(</span><span class="n">url</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_string</span><span class="p">(</span>
<span class="s1">'Content-Type: </span><span class="si">%s</span><span class="se">\n</span><span class="s1">Content-Length: </span><span class="si">%d</span><span class="se">\n</span><span class="s1">Last-modified: </span><span class="si">%s</span><span class="se">\n</span><span class="s1">'</span> <span class="o">%</span>
<span class="p">(</span><span class="n">mtype</span> <span class="ow">or</span> <span class="s1">'text/plain'</span><span class="p">,</span> <span class="n">size</span><span class="p">,</span> <span class="n">modified</span><span class="p">))</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">host</span><span class="p">:</span>
<span class="n">urlfile</span> <span class="o">=</span> <span class="n">file</span>
<span class="k">if</span> <span class="n">file</span><span class="p">[:</span><span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'/'</span><span class="p">:</span>
<span class="n">urlfile</span> <span class="o">=</span> <span class="s1">'file://'</span> <span class="o">+</span> <span class="n">file</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="nb">open</span><span class="p">(</span><span class="n">localname</span><span class="p">,</span> <span class="s1">'rb'</span><span class="p">),</span> <span class="n">headers</span><span class="p">,</span> <span class="n">urlfile</span><span class="p">)</span>
<span class="n">host</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">if</span> <span class="p">(</span><span class="ow">not</span> <span class="n">port</span>
<span class="ow">and</span> <span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="n">host</span><span class="p">)</span> <span class="ow">in</span> <span class="p">((</span><span class="n">localhost</span><span class="p">(),)</span> <span class="o">+</span> <span class="n">thishost</span><span class="p">())):</span>
<span class="n">urlfile</span> <span class="o">=</span> <span class="n">file</span>
<span class="k">if</span> <span class="n">file</span><span class="p">[:</span><span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'/'</span><span class="p">:</span>
<span class="n">urlfile</span> <span class="o">=</span> <span class="s1">'file://'</span> <span class="o">+</span> <span class="n">file</span>
<span class="k">elif</span> <span class="n">file</span><span class="p">[:</span><span class="mi">2</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'./'</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"local file url may start with / or file:. Unknown url of type: </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">url</span><span class="p">)</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="nb">open</span><span class="p">(</span><span class="n">localname</span><span class="p">,</span> <span class="s1">'rb'</span><span class="p">),</span> <span class="n">headers</span><span class="p">,</span> <span class="n">urlfile</span><span class="p">)</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'local file error: not on local host'</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">open_ftp</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">):</span>
<span class="sd">"""Use FTP protocol."""</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'ftp error: proxy support for ftp protocol currently not implemented'</span><span class="p">)</span>
<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="n">host</span><span class="p">,</span> <span class="n">path</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">host</span><span class="p">:</span> <span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'ftp error: no host given'</span><span class="p">)</span>
<span class="n">host</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="n">user</span><span class="p">,</span> <span class="n">host</span> <span class="o">=</span> <span class="n">splituser</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">if</span> <span class="n">user</span><span class="p">:</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="n">splitpasswd</span><span class="p">(</span><span class="n">user</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span> <span class="n">passwd</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="n">user</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">user</span> <span class="ow">or</span> <span class="s1">''</span><span class="p">)</span>
<span class="n">passwd</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">passwd</span> <span class="ow">or</span> <span class="s1">''</span><span class="p">)</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">port</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">ftplib</span>
<span class="n">port</span> <span class="o">=</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">FTP_PORT</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">port</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">port</span><span class="p">)</span>
<span class="n">path</span><span class="p">,</span> <span class="n">attrs</span> <span class="o">=</span> <span class="n">splitattr</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="n">dirs</span> <span class="o">=</span> <span class="n">path</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'/'</span><span class="p">)</span>
<span class="n">dirs</span><span class="p">,</span> <span class="n">file</span> <span class="o">=</span> <span class="n">dirs</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">],</span> <span class="n">dirs</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>
<span class="k">if</span> <span class="n">dirs</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">dirs</span><span class="p">[</span><span class="mi">0</span><span class="p">]:</span> <span class="n">dirs</span> <span class="o">=</span> <span class="n">dirs</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span>
<span class="k">if</span> <span class="n">dirs</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">dirs</span><span class="p">[</span><span class="mi">0</span><span class="p">]:</span> <span class="n">dirs</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'/'</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">user</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="s1">'/'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">dirs</span><span class="p">)</span>
<span class="c1"># XXX thread unsafe!</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span><span class="p">)</span> <span class="o">></span> <span class="n">MAXFTPCACHE</span><span class="p">:</span>
<span class="c1"># Prune the cache, rather arbitrarily</span>
<span class="k">for</span> <span class="n">k</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span><span class="p">):</span>
<span class="k">if</span> <span class="n">k</span> <span class="o">!=</span> <span class="n">key</span><span class="p">:</span>
<span class="n">v</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span><span class="p">[</span><span class="n">k</span><span class="p">]</span>
<span class="n">v</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="n">key</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> \
<span class="n">ftpwrapper</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">dirs</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">file</span><span class="p">:</span> <span class="nb">type</span> <span class="o">=</span> <span class="s1">'D'</span>
<span class="k">else</span><span class="p">:</span> <span class="nb">type</span> <span class="o">=</span> <span class="s1">'I'</span>
<span class="k">for</span> <span class="n">attr</span> <span class="ow">in</span> <span class="n">attrs</span><span class="p">:</span>
<span class="n">attr</span><span class="p">,</span> <span class="n">value</span> <span class="o">=</span> <span class="n">splitvalue</span><span class="p">(</span><span class="n">attr</span><span class="p">)</span>
<span class="k">if</span> <span class="n">attr</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'type'</span> <span class="ow">and</span> \
<span class="n">value</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'a'</span><span class="p">,</span> <span class="s1">'A'</span><span class="p">,</span> <span class="s1">'i'</span><span class="p">,</span> <span class="s1">'I'</span><span class="p">,</span> <span class="s1">'d'</span><span class="p">,</span> <span class="s1">'D'</span><span class="p">):</span>
<span class="nb">type</span> <span class="o">=</span> <span class="n">value</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span>
<span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">retrlen</span><span class="p">)</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">ftpcache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span><span class="o">.</span><span class="n">retrfile</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="nb">type</span><span class="p">)</span>
<span class="n">mtype</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_type</span><span class="p">(</span><span class="s2">"ftp:"</span> <span class="o">+</span> <span class="n">url</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">headers</span> <span class="o">=</span> <span class="s2">""</span>
<span class="k">if</span> <span class="n">mtype</span><span class="p">:</span>
<span class="n">headers</span> <span class="o">+=</span> <span class="s2">"Content-Type: </span><span class="si">%s</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="n">mtype</span>
<span class="k">if</span> <span class="n">retrlen</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">retrlen</span> <span class="o">>=</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">headers</span> <span class="o">+=</span> <span class="s2">"Content-Length: </span><span class="si">%d</span><span class="se">\n</span><span class="s2">"</span> <span class="o">%</span> <span class="n">retrlen</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_string</span><span class="p">(</span><span class="n">headers</span><span class="p">)</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="s2">"ftp:"</span> <span class="o">+</span> <span class="n">url</span><span class="p">)</span>
<span class="k">except</span> <span class="n">ftperrors</span><span class="p">()</span> <span class="k">as</span> <span class="n">exp</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'ftp error </span><span class="si">%r</span><span class="s1">'</span> <span class="o">%</span> <span class="n">exp</span><span class="p">)</span><span class="o">.</span><span class="n">with_traceback</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">def</span> <span class="nf">open_data</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Use "data" URL."""</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'data error: proxy support for data protocol currently not implemented'</span><span class="p">)</span>
<span class="c1"># ignore POSTed data</span>
<span class="c1">#</span>
<span class="c1"># syntax of data URLs:</span>
<span class="c1"># dataurl := "data:" [ mediatype ] [ ";base64" ] "," data</span>
<span class="c1"># mediatype := [ type "/" subtype ] *( ";" parameter )</span>
<span class="c1"># data := *urlchar</span>
<span class="c1"># parameter := attribute "=" value</span>
<span class="k">try</span><span class="p">:</span>
<span class="p">[</span><span class="nb">type</span><span class="p">,</span> <span class="n">data</span><span class="p">]</span> <span class="o">=</span> <span class="n">url</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">','</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">ValueError</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">OSError</span><span class="p">(</span><span class="s1">'data error'</span><span class="p">,</span> <span class="s1">'bad data URL'</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">type</span><span class="p">:</span>
<span class="nb">type</span> <span class="o">=</span> <span class="s1">'text/plain;charset=US-ASCII'</span>
<span class="n">semi</span> <span class="o">=</span> <span class="nb">type</span><span class="o">.</span><span class="n">rfind</span><span class="p">(</span><span class="s1">';'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">semi</span> <span class="o">>=</span> <span class="mi">0</span> <span class="ow">and</span> <span class="s1">'='</span> <span class="ow">not</span> <span class="ow">in</span> <span class="nb">type</span><span class="p">[</span><span class="n">semi</span><span class="p">:]:</span>
<span class="n">encoding</span> <span class="o">=</span> <span class="nb">type</span><span class="p">[</span><span class="n">semi</span><span class="o">+</span><span class="mi">1</span><span class="p">:]</span>
<span class="nb">type</span> <span class="o">=</span> <span class="nb">type</span><span class="p">[:</span><span class="n">semi</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">encoding</span> <span class="o">=</span> <span class="s1">''</span>
<span class="n">msg</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">msg</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'Date: </span><span class="si">%s</span><span class="s1">'</span><span class="o">%</span><span class="n">time</span><span class="o">.</span><span class="n">strftime</span><span class="p">(</span><span class="s1">'</span><span class="si">%a</span><span class="s1">, </span><span class="si">%d</span><span class="s1"> %b %Y %H:%M:%S GMT'</span><span class="p">,</span>
<span class="n">time</span><span class="o">.</span><span class="n">gmtime</span><span class="p">(</span><span class="n">time</span><span class="o">.</span><span class="n">time</span><span class="p">())))</span>
<span class="n">msg</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'Content-type: </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="nb">type</span><span class="p">)</span>
<span class="k">if</span> <span class="n">encoding</span> <span class="o">==</span> <span class="s1">'base64'</span><span class="p">:</span>
<span class="c1"># XXX is this encoding/decoding ok?</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">base64</span><span class="o">.</span><span class="n">decodebytes</span><span class="p">(</span><span class="n">data</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'ascii'</span><span class="p">))</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">'latin-1'</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">unquote</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="n">msg</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">'Content-Length: </span><span class="si">%d</span><span class="s1">'</span> <span class="o">%</span> <span class="nb">len</span><span class="p">(</span><span class="n">data</span><span class="p">))</span>
<span class="n">msg</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="s1">''</span><span class="p">)</span>
<span class="n">msg</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">data</span><span class="p">)</span>
<span class="n">msg</span> <span class="o">=</span> <span class="s1">'</span><span class="se">\n</span><span class="s1">'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_string</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="n">f</span> <span class="o">=</span> <span class="n">io</span><span class="o">.</span><span class="n">StringIO</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="c1">#f.fileno = None # needed for addinfourl</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="n">f</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">url</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">FancyURLopener</span><span class="p">(</span><span class="n">URLopener</span><span class="p">):</span>
<span class="sd">"""Derived class with handlers for errors we can handle (perhaps)."""</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">URLopener</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">auth_cache</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tries</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">maxtries</span> <span class="o">=</span> <span class="mi">10</span>
<span class="k">def</span> <span class="nf">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">):</span>
<span class="sd">"""Default error handling -- don't raise an exception."""</span>
<span class="k">return</span> <span class="n">addinfourl</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="s2">"http:"</span> <span class="o">+</span> <span class="n">url</span><span class="p">,</span> <span class="n">errcode</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error_302</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Error 302 -- relocated (temporarily)."""</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tries</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">maxtries</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">tries</span> <span class="o">>=</span> <span class="bp">self</span><span class="o">.</span><span class="n">maxtries</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s2">"http_error_500"</span><span class="p">):</span>
<span class="n">meth</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_500</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">meth</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_default</span>
<span class="k">return</span> <span class="n">meth</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="mi">500</span><span class="p">,</span>
<span class="s2">"Internal Server Error: Redirect Recursion"</span><span class="p">,</span>
<span class="n">headers</span><span class="p">)</span>
<span class="n">result</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">redirect_internal</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span>
<span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">return</span> <span class="n">result</span>
<span class="k">finally</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tries</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">redirect_internal</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span>
<span class="k">if</span> <span class="s1">'location'</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">headers</span><span class="p">[</span><span class="s1">'location'</span><span class="p">]</span>
<span class="k">elif</span> <span class="s1">'uri'</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">headers</span><span class="p">[</span><span class="s1">'uri'</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span>
<span class="n">fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="c1"># In case the server sent a relative URL, join with original:</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="n">urljoin</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">type</span> <span class="o">+</span> <span class="s2">":"</span> <span class="o">+</span> <span class="n">url</span><span class="p">,</span> <span class="n">newurl</span><span class="p">)</span>
<span class="n">urlparts</span> <span class="o">=</span> <span class="n">urlparse</span><span class="p">(</span><span class="n">newurl</span><span class="p">)</span>
<span class="c1"># For security reasons, we don't allow redirection to anything other</span>
<span class="c1"># than http, https and ftp.</span>
<span class="c1"># We are using newer HTTPError with older redirect_internal method</span>
<span class="c1"># This older method will get deprecated in 3.3</span>
<span class="k">if</span> <span class="n">urlparts</span><span class="o">.</span><span class="n">scheme</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'http'</span><span class="p">,</span> <span class="s1">'https'</span><span class="p">,</span> <span class="s1">'ftp'</span><span class="p">,</span> <span class="s1">''</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">HTTPError</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span>
<span class="n">errmsg</span> <span class="o">+</span>
<span class="s2">" Redirection to url '</span><span class="si">%s</span><span class="s2">' is not allowed."</span> <span class="o">%</span> <span class="n">newurl</span><span class="p">,</span>
<span class="n">headers</span><span class="p">,</span> <span class="n">fp</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error_301</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Error 301 -- also relocated (permanently)."""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_302</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error_303</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Error 303 -- also relocated (essentially identical to 302)."""</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_302</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error_307</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Error 307 -- relocated, but turn POST into error."""</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_302</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error_401</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">retry</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""Error 401 -- authentication required.</span>
<span class="sd"> This function supports Basic authentication only."""</span>
<span class="k">if</span> <span class="s1">'www-authenticate'</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span>
<span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="n">stuff</span> <span class="o">=</span> <span class="n">headers</span><span class="p">[</span><span class="s1">'www-authenticate'</span><span class="p">]</span>
<span class="n">match</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="s1">'[ </span><span class="se">\t</span><span class="s1">]*([^ </span><span class="se">\t</span><span class="s1">]+)[ </span><span class="se">\t</span><span class="s1">]+realm="([^"]*)"'</span><span class="p">,</span> <span class="n">stuff</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">match</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span>
<span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="n">scheme</span><span class="p">,</span> <span class="n">realm</span> <span class="o">=</span> <span class="n">match</span><span class="o">.</span><span class="n">groups</span><span class="p">()</span>
<span class="k">if</span> <span class="n">scheme</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">!=</span> <span class="s1">'basic'</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span>
<span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">retry</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span>
<span class="n">headers</span><span class="p">)</span>
<span class="n">name</span> <span class="o">=</span> <span class="s1">'retry_'</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span> <span class="o">+</span> <span class="s1">'_basic_auth'</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">name</span><span class="p">)(</span><span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">name</span><span class="p">)(</span><span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">http_error_407</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">retry</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""Error 407 -- proxy authentication required.</span>
<span class="sd"> This function supports Basic authentication only."""</span>
<span class="k">if</span> <span class="s1">'proxy-authenticate'</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span>
<span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="n">stuff</span> <span class="o">=</span> <span class="n">headers</span><span class="p">[</span><span class="s1">'proxy-authenticate'</span><span class="p">]</span>
<span class="n">match</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="s1">'[ </span><span class="se">\t</span><span class="s1">]*([^ </span><span class="se">\t</span><span class="s1">]+)[ </span><span class="se">\t</span><span class="s1">]+realm="([^"]*)"'</span><span class="p">,</span> <span class="n">stuff</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">match</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span>
<span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="n">scheme</span><span class="p">,</span> <span class="n">realm</span> <span class="o">=</span> <span class="n">match</span><span class="o">.</span><span class="n">groups</span><span class="p">()</span>
<span class="k">if</span> <span class="n">scheme</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">!=</span> <span class="s1">'basic'</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span>
<span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span> <span class="n">headers</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">retry</span><span class="p">:</span>
<span class="n">URLopener</span><span class="o">.</span><span class="n">http_error_default</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">errcode</span><span class="p">,</span> <span class="n">errmsg</span><span class="p">,</span>
<span class="n">headers</span><span class="p">)</span>
<span class="n">name</span> <span class="o">=</span> <span class="s1">'retry_proxy_'</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">type</span> <span class="o">+</span> <span class="s1">'_basic_auth'</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">name</span><span class="p">)(</span><span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">name</span><span class="p">)(</span><span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">retry_proxy_http_basic_auth</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">host</span><span class="p">,</span> <span class="n">selector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="s1">'http://'</span> <span class="o">+</span> <span class="n">host</span> <span class="o">+</span> <span class="n">selector</span>
<span class="n">proxy</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">proxies</span><span class="p">[</span><span class="s1">'http'</span><span class="p">]</span>
<span class="n">urltype</span><span class="p">,</span> <span class="n">proxyhost</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">proxy</span><span class="p">)</span>
<span class="n">proxyhost</span><span class="p">,</span> <span class="n">proxyselector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">proxyhost</span><span class="p">)</span>
<span class="n">i</span> <span class="o">=</span> <span class="n">proxyhost</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s1">'@'</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
<span class="n">proxyhost</span> <span class="o">=</span> <span class="n">proxyhost</span><span class="p">[</span><span class="n">i</span><span class="p">:]</span>
<span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_user_passwd</span><span class="p">(</span><span class="n">proxyhost</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">i</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">user</span> <span class="ow">or</span> <span class="n">passwd</span><span class="p">):</span> <span class="k">return</span> <span class="kc">None</span>
<span class="n">proxyhost</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">@</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">quote</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span>
<span class="n">quote</span><span class="p">(</span><span class="n">passwd</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span> <span class="n">proxyhost</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">proxies</span><span class="p">[</span><span class="s1">'http'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'http://'</span> <span class="o">+</span> <span class="n">proxyhost</span> <span class="o">+</span> <span class="n">proxyselector</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">retry_proxy_https_basic_auth</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">host</span><span class="p">,</span> <span class="n">selector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="s1">'https://'</span> <span class="o">+</span> <span class="n">host</span> <span class="o">+</span> <span class="n">selector</span>
<span class="n">proxy</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">proxies</span><span class="p">[</span><span class="s1">'https'</span><span class="p">]</span>
<span class="n">urltype</span><span class="p">,</span> <span class="n">proxyhost</span> <span class="o">=</span> <span class="n">splittype</span><span class="p">(</span><span class="n">proxy</span><span class="p">)</span>
<span class="n">proxyhost</span><span class="p">,</span> <span class="n">proxyselector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">proxyhost</span><span class="p">)</span>
<span class="n">i</span> <span class="o">=</span> <span class="n">proxyhost</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s1">'@'</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
<span class="n">proxyhost</span> <span class="o">=</span> <span class="n">proxyhost</span><span class="p">[</span><span class="n">i</span><span class="p">:]</span>
<span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_user_passwd</span><span class="p">(</span><span class="n">proxyhost</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">i</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">user</span> <span class="ow">or</span> <span class="n">passwd</span><span class="p">):</span> <span class="k">return</span> <span class="kc">None</span>
<span class="n">proxyhost</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">@</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">quote</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span>
<span class="n">quote</span><span class="p">(</span><span class="n">passwd</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span> <span class="n">proxyhost</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">proxies</span><span class="p">[</span><span class="s1">'https'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'https://'</span> <span class="o">+</span> <span class="n">proxyhost</span> <span class="o">+</span> <span class="n">proxyselector</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">retry_http_basic_auth</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">host</span><span class="p">,</span> <span class="n">selector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="n">i</span> <span class="o">=</span> <span class="n">host</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s1">'@'</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">host</span><span class="p">[</span><span class="n">i</span><span class="p">:]</span>
<span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_user_passwd</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">i</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">user</span> <span class="ow">or</span> <span class="n">passwd</span><span class="p">):</span> <span class="k">return</span> <span class="kc">None</span>
<span class="n">host</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">@</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">quote</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span>
<span class="n">quote</span><span class="p">(</span><span class="n">passwd</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span> <span class="n">host</span><span class="p">)</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="s1">'http://'</span> <span class="o">+</span> <span class="n">host</span> <span class="o">+</span> <span class="n">selector</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">retry_https_basic_auth</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">host</span><span class="p">,</span> <span class="n">selector</span> <span class="o">=</span> <span class="n">splithost</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="n">i</span> <span class="o">=</span> <span class="n">host</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="s1">'@'</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span>
<span class="n">host</span> <span class="o">=</span> <span class="n">host</span><span class="p">[</span><span class="n">i</span><span class="p">:]</span>
<span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_user_passwd</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">i</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="p">(</span><span class="n">user</span> <span class="ow">or</span> <span class="n">passwd</span><span class="p">):</span> <span class="k">return</span> <span class="kc">None</span>
<span class="n">host</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">:</span><span class="si">%s</span><span class="s2">@</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">quote</span><span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span>
<span class="n">quote</span><span class="p">(</span><span class="n">passwd</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="s1">''</span><span class="p">),</span> <span class="n">host</span><span class="p">)</span>
<span class="n">newurl</span> <span class="o">=</span> <span class="s1">'https://'</span> <span class="o">+</span> <span class="n">host</span> <span class="o">+</span> <span class="n">selector</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">newurl</span><span class="p">,</span> <span class="n">data</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_user_passwd</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">clear_cache</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
<span class="n">key</span> <span class="o">=</span> <span class="n">realm</span> <span class="o">+</span> <span class="s1">'@'</span> <span class="o">+</span> <span class="n">host</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">auth_cache</span><span class="p">:</span>
<span class="k">if</span> <span class="n">clear_cache</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">auth_cache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">auth_cache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span>
<span class="n">user</span><span class="p">,</span> <span class="n">passwd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">prompt_user_passwd</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">realm</span><span class="p">)</span>
<span class="k">if</span> <span class="n">user</span> <span class="ow">or</span> <span class="n">passwd</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">auth_cache</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">)</span>
<span class="k">return</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span>
<span class="k">def</span> <span class="nf">prompt_user_passwd</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">realm</span><span class="p">):</span>
<span class="sd">"""Override this in a GUI environment!"""</span>
<span class="kn">import</span> <span class="nn">getpass</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">user</span> <span class="o">=</span> <span class="nb">input</span><span class="p">(</span><span class="s2">"Enter username for </span><span class="si">%s</span><span class="s2"> at </span><span class="si">%s</span><span class="s2">: "</span> <span class="o">%</span> <span class="p">(</span><span class="n">realm</span><span class="p">,</span> <span class="n">host</span><span class="p">))</span>
<span class="n">passwd</span> <span class="o">=</span> <span class="n">getpass</span><span class="o">.</span><span class="n">getpass</span><span class="p">(</span><span class="s2">"Enter password for </span><span class="si">%s</span><span class="s2"> in </span><span class="si">%s</span><span class="s2"> at </span><span class="si">%s</span><span class="s2">: "</span> <span class="o">%</span>
<span class="p">(</span><span class="n">user</span><span class="p">,</span> <span class="n">realm</span><span class="p">,</span> <span class="n">host</span><span class="p">))</span>
<span class="k">return</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span>
<span class="k">except</span> <span class="ne">KeyboardInterrupt</span><span class="p">:</span>
<span class="nb">print</span><span class="p">()</span>
<span class="k">return</span> <span class="kc">None</span><span class="p">,</span> <span class="kc">None</span>
<span class="c1"># Utility functions</span>
<span class="n">_localhost</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">localhost</span><span class="p">():</span>
<span class="sd">"""Return the IP address of the magic hostname 'localhost'."""</span>
<span class="k">global</span> <span class="n">_localhost</span>
<span class="k">if</span> <span class="n">_localhost</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">_localhost</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="s1">'localhost'</span><span class="p">)</span>
<span class="k">return</span> <span class="n">_localhost</span>
<span class="n">_thishost</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">thishost</span><span class="p">():</span>
<span class="sd">"""Return the IP addresses of the current host."""</span>
<span class="k">global</span> <span class="n">_thishost</span>
<span class="k">if</span> <span class="n">_thishost</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">_thishost</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname_ex</span><span class="p">(</span><span class="n">socket</span><span class="o">.</span><span class="n">gethostname</span><span class="p">())[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">except</span> <span class="n">socket</span><span class="o">.</span><span class="n">gaierror</span><span class="p">:</span>
<span class="n">_thishost</span> <span class="o">=</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname_ex</span><span class="p">(</span><span class="s1">'localhost'</span><span class="p">)[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">return</span> <span class="n">_thishost</span>
<span class="n">_ftperrors</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">ftperrors</span><span class="p">():</span>
<span class="sd">"""Return the set of errors raised by the FTP class."""</span>
<span class="k">global</span> <span class="n">_ftperrors</span>
<span class="k">if</span> <span class="n">_ftperrors</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">ftplib</span>
<span class="n">_ftperrors</span> <span class="o">=</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">all_errors</span>
<span class="k">return</span> <span class="n">_ftperrors</span>
<span class="n">_noheaders</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">noheaders</span><span class="p">():</span>
<span class="sd">"""Return an empty email Message object."""</span>
<span class="k">global</span> <span class="n">_noheaders</span>
<span class="k">if</span> <span class="n">_noheaders</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">_noheaders</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_string</span><span class="p">(</span><span class="s2">""</span><span class="p">)</span>
<span class="k">return</span> <span class="n">_noheaders</span>
<span class="c1"># Utility classes</span>
<span class="k">class</span> <span class="nc">ftpwrapper</span><span class="p">:</span>
<span class="sd">"""Class used by open_ftp() for cache of open FTP connections."""</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">user</span><span class="p">,</span> <span class="n">passwd</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">port</span><span class="p">,</span> <span class="n">dirs</span><span class="p">,</span> <span class="n">timeout</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">persistent</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">user</span> <span class="o">=</span> <span class="n">user</span>
<span class="bp">self</span><span class="o">.</span><span class="n">passwd</span> <span class="o">=</span> <span class="n">passwd</span>
<span class="bp">self</span><span class="o">.</span><span class="n">host</span> <span class="o">=</span> <span class="n">host</span>
<span class="bp">self</span><span class="o">.</span><span class="n">port</span> <span class="o">=</span> <span class="n">port</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dirs</span> <span class="o">=</span> <span class="n">dirs</span>
<span class="bp">self</span><span class="o">.</span><span class="n">timeout</span> <span class="o">=</span> <span class="n">timeout</span>
<span class="bp">self</span><span class="o">.</span><span class="n">refcount</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">keepalive</span> <span class="o">=</span> <span class="n">persistent</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">init</span><span class="p">()</span>
<span class="k">except</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">raise</span>
<span class="k">def</span> <span class="nf">init</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="kn">import</span> <span class="nn">ftplib</span>
<span class="bp">self</span><span class="o">.</span><span class="n">busy</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span> <span class="o">=</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">FTP</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">host</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">port</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">timeout</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">login</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">user</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">passwd</span><span class="p">)</span>
<span class="n">_target</span> <span class="o">=</span> <span class="s1">'/'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dirs</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">cwd</span><span class="p">(</span><span class="n">_target</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">retrfile</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">file</span><span class="p">,</span> <span class="nb">type</span><span class="p">):</span>
<span class="kn">import</span> <span class="nn">ftplib</span>
<span class="bp">self</span><span class="o">.</span><span class="n">endtransfer</span><span class="p">()</span>
<span class="k">if</span> <span class="nb">type</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'d'</span><span class="p">,</span> <span class="s1">'D'</span><span class="p">):</span> <span class="n">cmd</span> <span class="o">=</span> <span class="s1">'TYPE A'</span><span class="p">;</span> <span class="n">isdir</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">else</span><span class="p">:</span> <span class="n">cmd</span> <span class="o">=</span> <span class="s1">'TYPE '</span> <span class="o">+</span> <span class="nb">type</span><span class="p">;</span> <span class="n">isdir</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">voidcmd</span><span class="p">(</span><span class="n">cmd</span><span class="p">)</span>
<span class="k">except</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">all_errors</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">init</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">voidcmd</span><span class="p">(</span><span class="n">cmd</span><span class="p">)</span>
<span class="n">conn</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">file</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">isdir</span><span class="p">:</span>
<span class="c1"># Try to retrieve as a file</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">cmd</span> <span class="o">=</span> <span class="s1">'RETR '</span> <span class="o">+</span> <span class="n">file</span>
<span class="n">conn</span><span class="p">,</span> <span class="n">retrlen</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">ntransfercmd</span><span class="p">(</span><span class="n">cmd</span><span class="p">)</span>
<span class="k">except</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">error_perm</span> <span class="k">as</span> <span class="n">reason</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">str</span><span class="p">(</span><span class="n">reason</span><span class="p">)[:</span><span class="mi">3</span><span class="p">]</span> <span class="o">!=</span> <span class="s1">'550'</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'ftp error: </span><span class="si">%r</span><span class="s1">'</span> <span class="o">%</span> <span class="n">reason</span><span class="p">)</span><span class="o">.</span><span class="n">with_traceback</span><span class="p">(</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exc_info</span><span class="p">()[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">conn</span><span class="p">:</span>
<span class="c1"># Set transfer mode to ASCII!</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">voidcmd</span><span class="p">(</span><span class="s1">'TYPE A'</span><span class="p">)</span>
<span class="c1"># Try a directory listing. Verify that directory exists.</span>
<span class="k">if</span> <span class="n">file</span><span class="p">:</span>
<span class="n">pwd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">pwd</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">cwd</span><span class="p">(</span><span class="n">file</span><span class="p">)</span>
<span class="k">except</span> <span class="n">ftplib</span><span class="o">.</span><span class="n">error_perm</span> <span class="k">as</span> <span class="n">reason</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">URLError</span><span class="p">(</span><span class="s1">'ftp error: </span><span class="si">%r</span><span class="s1">'</span> <span class="o">%</span> <span class="n">reason</span><span class="p">)</span> <span class="kn">from</span> <span class="nn">reason</span>
<span class="k">finally</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">cwd</span><span class="p">(</span><span class="n">pwd</span><span class="p">)</span>
<span class="n">cmd</span> <span class="o">=</span> <span class="s1">'LIST '</span> <span class="o">+</span> <span class="n">file</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">cmd</span> <span class="o">=</span> <span class="s1">'LIST'</span>
<span class="n">conn</span><span class="p">,</span> <span class="n">retrlen</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">ntransfercmd</span><span class="p">(</span><span class="n">cmd</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">busy</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">ftpobj</span> <span class="o">=</span> <span class="n">addclosehook</span><span class="p">(</span><span class="n">conn</span><span class="o">.</span><span class="n">makefile</span><span class="p">(</span><span class="s1">'rb'</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">file_close</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">refcount</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="n">conn</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="c1"># Pass back both a suitably decorated object and a retrieval length</span>
<span class="k">return</span> <span class="p">(</span><span class="n">ftpobj</span><span class="p">,</span> <span class="n">retrlen</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">endtransfer</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">busy</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">close</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">keepalive</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">refcount</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">real_close</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">file_close</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">endtransfer</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">refcount</span> <span class="o">-=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">refcount</span> <span class="o"><=</span> <span class="mi">0</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">keepalive</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">real_close</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">real_close</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">endtransfer</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">ftp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">except</span> <span class="n">ftperrors</span><span class="p">():</span>
<span class="k">pass</span>
<span class="c1"># Proxy handling</span>
<span class="k">def</span> <span class="nf">getproxies_environment</span><span class="p">():</span>
<span class="sd">"""Return a dictionary of scheme -> proxy server URL mappings.</span>
<span class="sd"> Scan the environment for variables named <scheme>_proxy;</span>
<span class="sd"> this seems to be the standard convention. If you need a</span>
<span class="sd"> different way, you can pass a proxies dictionary to the</span>
<span class="sd"> [Fancy]URLopener constructor.</span>
<span class="sd"> """</span>
<span class="n">proxies</span> <span class="o">=</span> <span class="p">{}</span>
<span class="c1"># in order to prefer lowercase variables, process environment in</span>
<span class="c1"># two passes: first matches any, second pass matches lowercase only</span>
<span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">if</span> <span class="n">value</span> <span class="ow">and</span> <span class="n">name</span><span class="p">[</span><span class="o">-</span><span class="mi">6</span><span class="p">:]</span> <span class="o">==</span> <span class="s1">'_proxy'</span><span class="p">:</span>
<span class="n">proxies</span><span class="p">[</span><span class="n">name</span><span class="p">[:</span><span class="o">-</span><span class="mi">6</span><span class="p">]]</span> <span class="o">=</span> <span class="n">value</span>
<span class="c1"># CVE-2016-1000110 - If we are running as CGI script, forget HTTP_PROXY</span>
<span class="c1"># (non-all-lowercase) as it may be set from the web server by a "Proxy:"</span>
<span class="c1"># header from the client</span>
<span class="c1"># If "proxy" is lowercase, it will still be used thanks to the next block</span>
<span class="k">if</span> <span class="s1">'REQUEST_METHOD'</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="p">:</span>
<span class="n">proxies</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s1">'http'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">for</span> <span class="n">name</span><span class="p">,</span> <span class="n">value</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">environ</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="k">if</span> <span class="n">name</span><span class="p">[</span><span class="o">-</span><span class="mi">6</span><span class="p">:]</span> <span class="o">==</span> <span class="s1">'_proxy'</span><span class="p">:</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span>
<span class="k">if</span> <span class="n">value</span><span class="p">:</span>
<span class="n">proxies</span><span class="p">[</span><span class="n">name</span><span class="p">[:</span><span class="o">-</span><span class="mi">6</span><span class="p">]]</span> <span class="o">=</span> <span class="n">value</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">proxies</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="n">name</span><span class="p">[:</span><span class="o">-</span><span class="mi">6</span><span class="p">],</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">return</span> <span class="n">proxies</span>
<span class="k">def</span> <span class="nf">proxy_bypass_environment</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">proxies</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""Test if proxies should not be used for a particular host.</span>
<span class="sd"> Checks the proxy dict for the value of no_proxy, which should</span>
<span class="sd"> be a list of comma separated DNS suffixes, or '*' for all hosts.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">proxies</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">proxies</span> <span class="o">=</span> <span class="n">getproxies_environment</span><span class="p">()</span>
<span class="c1"># don't bypass, if no_proxy isn't specified</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">no_proxy</span> <span class="o">=</span> <span class="n">proxies</span><span class="p">[</span><span class="s1">'no'</span><span class="p">]</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="c1"># '*' is special case for always bypass</span>
<span class="k">if</span> <span class="n">no_proxy</span> <span class="o">==</span> <span class="s1">'*'</span><span class="p">:</span>
<span class="k">return</span> <span class="mi">1</span>
<span class="c1"># strip port off host</span>
<span class="n">hostonly</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="c1"># check if the host ends with any of the DNS suffixes</span>
<span class="n">no_proxy_list</span> <span class="o">=</span> <span class="p">[</span><span class="n">proxy</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span> <span class="k">for</span> <span class="n">proxy</span> <span class="ow">in</span> <span class="n">no_proxy</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">','</span><span class="p">)]</span>
<span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">no_proxy_list</span><span class="p">:</span>
<span class="k">if</span> <span class="n">name</span><span class="p">:</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">.</span><span class="n">lstrip</span><span class="p">(</span><span class="s1">'.'</span><span class="p">)</span> <span class="c1"># ignore leading dots</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">escape</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">pattern</span> <span class="o">=</span> <span class="sa">r</span><span class="s1">'(.+\.)?</span><span class="si">%s</span><span class="s1">$'</span> <span class="o">%</span> <span class="n">name</span>
<span class="k">if</span> <span class="p">(</span><span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">pattern</span><span class="p">,</span> <span class="n">hostonly</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">I</span><span class="p">)</span>
<span class="ow">or</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">pattern</span><span class="p">,</span> <span class="n">host</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">I</span><span class="p">)):</span>
<span class="k">return</span> <span class="mi">1</span>
<span class="c1"># otherwise, don't bypass</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="c1"># This code tests an OSX specific data structure but is testable on all</span>
<span class="c1"># platforms</span>
<span class="k">def</span> <span class="nf">_proxy_bypass_macosx_sysconf</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">proxy_settings</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Return True iff this host shouldn't be accessed using a proxy</span>
<span class="sd"> This function uses the MacOSX framework SystemConfiguration</span>
<span class="sd"> to fetch the proxy information.</span>
<span class="sd"> proxy_settings come from _scproxy._get_proxy_settings or get mocked ie:</span>
<span class="sd"> { 'exclude_simple': bool,</span>
<span class="sd"> 'exceptions': ['foo.bar', '*.bar.com', '127.0.0.1', '10.1', '10.0/16']</span>
<span class="sd"> }</span>
<span class="sd"> """</span>
<span class="kn">from</span> <span class="nn">fnmatch</span> <span class="k">import</span> <span class="n">fnmatch</span>
<span class="n">hostonly</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">ip2num</span><span class="p">(</span><span class="n">ipAddr</span><span class="p">):</span>
<span class="n">parts</span> <span class="o">=</span> <span class="n">ipAddr</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'.'</span><span class="p">)</span>
<span class="n">parts</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="nb">int</span><span class="p">,</span> <span class="n">parts</span><span class="p">))</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">parts</span><span class="p">)</span> <span class="o">!=</span> <span class="mi">4</span><span class="p">:</span>
<span class="n">parts</span> <span class="o">=</span> <span class="p">(</span><span class="n">parts</span> <span class="o">+</span> <span class="p">[</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">])[:</span><span class="mi">4</span><span class="p">]</span>
<span class="k">return</span> <span class="p">(</span><span class="n">parts</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o"><<</span> <span class="mi">24</span><span class="p">)</span> <span class="o">|</span> <span class="p">(</span><span class="n">parts</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o"><<</span> <span class="mi">16</span><span class="p">)</span> <span class="o">|</span> <span class="p">(</span><span class="n">parts</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o"><<</span> <span class="mi">8</span><span class="p">)</span> <span class="o">|</span> <span class="n">parts</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span>
<span class="c1"># Check for simple host names:</span>
<span class="k">if</span> <span class="s1">'.'</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">host</span><span class="p">:</span>
<span class="k">if</span> <span class="n">proxy_settings</span><span class="p">[</span><span class="s1">'exclude_simple'</span><span class="p">]:</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="n">hostIP</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">for</span> <span class="n">value</span> <span class="ow">in</span> <span class="n">proxy_settings</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'exceptions'</span><span class="p">,</span> <span class="p">()):</span>
<span class="c1"># Items in the list are strings like these: *.local, 169.254/16</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">value</span><span class="p">:</span> <span class="k">continue</span>
<span class="n">m</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="sa">r</span><span class="s2">"(\d+(?:\.\d+)*)(/\d+)?"</span><span class="p">,</span> <span class="n">value</span><span class="p">)</span>
<span class="k">if</span> <span class="n">m</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">if</span> <span class="n">hostIP</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">hostIP</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="n">hostonly</span><span class="p">)</span>
<span class="n">hostIP</span> <span class="o">=</span> <span class="n">ip2num</span><span class="p">(</span><span class="n">hostIP</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">continue</span>
<span class="n">base</span> <span class="o">=</span> <span class="n">ip2num</span><span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">))</span>
<span class="n">mask</span> <span class="o">=</span> <span class="n">m</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<span class="k">if</span> <span class="n">mask</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">mask</span> <span class="o">=</span> <span class="mi">8</span> <span class="o">*</span> <span class="p">(</span><span class="n">m</span><span class="o">.</span><span class="n">group</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="o">.</span><span class="n">count</span><span class="p">(</span><span class="s1">'.'</span><span class="p">)</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">mask</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">mask</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span>
<span class="n">mask</span> <span class="o">=</span> <span class="mi">32</span> <span class="o">-</span> <span class="n">mask</span>
<span class="k">if</span> <span class="p">(</span><span class="n">hostIP</span> <span class="o">>></span> <span class="n">mask</span><span class="p">)</span> <span class="o">==</span> <span class="p">(</span><span class="n">base</span> <span class="o">>></span> <span class="n">mask</span><span class="p">):</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="k">elif</span> <span class="n">fnmatch</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="k">return</span> <span class="kc">True</span>
<span class="k">return</span> <span class="kc">False</span>
<span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">platform</span> <span class="o">==</span> <span class="s1">'darwin'</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">_scproxy</span> <span class="k">import</span> <span class="n">_get_proxy_settings</span><span class="p">,</span> <span class="n">_get_proxies</span>
<span class="k">def</span> <span class="nf">proxy_bypass_macosx_sysconf</span><span class="p">(</span><span class="n">host</span><span class="p">):</span>
<span class="n">proxy_settings</span> <span class="o">=</span> <span class="n">_get_proxy_settings</span><span class="p">()</span>
<span class="k">return</span> <span class="n">_proxy_bypass_macosx_sysconf</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">proxy_settings</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getproxies_macosx_sysconf</span><span class="p">():</span>
<span class="sd">"""Return a dictionary of scheme -> proxy server URL mappings.</span>
<span class="sd"> This function uses the MacOSX framework SystemConfiguration</span>
<span class="sd"> to fetch the proxy information.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">_get_proxies</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">proxy_bypass</span><span class="p">(</span><span class="n">host</span><span class="p">):</span>
<span class="sd">"""Return True, if host should be bypassed.</span>
<span class="sd"> Checks proxy settings gathered from the environment, if specified,</span>
<span class="sd"> or from the MacOSX framework SystemConfiguration.</span>
<span class="sd"> """</span>
<span class="n">proxies</span> <span class="o">=</span> <span class="n">getproxies_environment</span><span class="p">()</span>
<span class="k">if</span> <span class="n">proxies</span><span class="p">:</span>
<span class="k">return</span> <span class="n">proxy_bypass_environment</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">proxies</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">proxy_bypass_macosx_sysconf</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getproxies</span><span class="p">():</span>
<span class="k">return</span> <span class="n">getproxies_environment</span><span class="p">()</span> <span class="ow">or</span> <span class="n">getproxies_macosx_sysconf</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">os</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="s1">'nt'</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">getproxies_registry</span><span class="p">():</span>
<span class="sd">"""Return a dictionary of scheme -> proxy server URL mappings.</span>
<span class="sd"> Win32 uses the registry to store proxies.</span>
<span class="sd"> """</span>
<span class="n">proxies</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">winreg</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="c1"># Std module, so should be around - but you never know!</span>
<span class="k">return</span> <span class="n">proxies</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">internetSettings</span> <span class="o">=</span> <span class="n">winreg</span><span class="o">.</span><span class="n">OpenKey</span><span class="p">(</span><span class="n">winreg</span><span class="o">.</span><span class="n">HKEY_CURRENT_USER</span><span class="p">,</span>
<span class="sa">r</span><span class="s1">'Software\Microsoft\Windows\CurrentVersion\Internet Settings'</span><span class="p">)</span>
<span class="n">proxyEnable</span> <span class="o">=</span> <span class="n">winreg</span><span class="o">.</span><span class="n">QueryValueEx</span><span class="p">(</span><span class="n">internetSettings</span><span class="p">,</span>
<span class="s1">'ProxyEnable'</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">proxyEnable</span><span class="p">:</span>
<span class="c1"># Returned as Unicode but problems if not converted to ASCII</span>
<span class="n">proxyServer</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">winreg</span><span class="o">.</span><span class="n">QueryValueEx</span><span class="p">(</span><span class="n">internetSettings</span><span class="p">,</span>
<span class="s1">'ProxyServer'</span><span class="p">)[</span><span class="mi">0</span><span class="p">])</span>
<span class="k">if</span> <span class="s1">'='</span> <span class="ow">in</span> <span class="n">proxyServer</span><span class="p">:</span>
<span class="c1"># Per-protocol settings</span>
<span class="k">for</span> <span class="n">p</span> <span class="ow">in</span> <span class="n">proxyServer</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">';'</span><span class="p">):</span>
<span class="n">protocol</span><span class="p">,</span> <span class="n">address</span> <span class="o">=</span> <span class="n">p</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">'='</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="c1"># See if address has a type:// prefix</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="s1">'^([^/:]+)://'</span><span class="p">,</span> <span class="n">address</span><span class="p">):</span>
<span class="n">address</span> <span class="o">=</span> <span class="s1">'</span><span class="si">%s</span><span class="s1">://</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">protocol</span><span class="p">,</span> <span class="n">address</span><span class="p">)</span>
<span class="n">proxies</span><span class="p">[</span><span class="n">protocol</span><span class="p">]</span> <span class="o">=</span> <span class="n">address</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># Use one setting for all protocols</span>
<span class="k">if</span> <span class="n">proxyServer</span><span class="p">[:</span><span class="mi">5</span><span class="p">]</span> <span class="o">==</span> <span class="s1">'http:'</span><span class="p">:</span>
<span class="n">proxies</span><span class="p">[</span><span class="s1">'http'</span><span class="p">]</span> <span class="o">=</span> <span class="n">proxyServer</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">proxies</span><span class="p">[</span><span class="s1">'http'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'http://</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">proxyServer</span>
<span class="n">proxies</span><span class="p">[</span><span class="s1">'https'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'https://</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">proxyServer</span>
<span class="n">proxies</span><span class="p">[</span><span class="s1">'ftp'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'ftp://</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">proxyServer</span>
<span class="n">internetSettings</span><span class="o">.</span><span class="n">Close</span><span class="p">()</span>
<span class="k">except</span> <span class="p">(</span><span class="ne">OSError</span><span class="p">,</span> <span class="ne">ValueError</span><span class="p">,</span> <span class="ne">TypeError</span><span class="p">):</span>
<span class="c1"># Either registry key not found etc, or the value in an</span>
<span class="c1"># unexpected format.</span>
<span class="c1"># proxies already set up to be empty so nothing to do</span>
<span class="k">pass</span>
<span class="k">return</span> <span class="n">proxies</span>
<span class="k">def</span> <span class="nf">getproxies</span><span class="p">():</span>
<span class="sd">"""Return a dictionary of scheme -> proxy server URL mappings.</span>
<span class="sd"> Returns settings gathered from the environment, if specified,</span>
<span class="sd"> or the registry.</span>
<span class="sd"> """</span>
<span class="k">return</span> <span class="n">getproxies_environment</span><span class="p">()</span> <span class="ow">or</span> <span class="n">getproxies_registry</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">proxy_bypass_registry</span><span class="p">(</span><span class="n">host</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">winreg</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="c1"># Std modules, so should be around - but you never know!</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">internetSettings</span> <span class="o">=</span> <span class="n">winreg</span><span class="o">.</span><span class="n">OpenKey</span><span class="p">(</span><span class="n">winreg</span><span class="o">.</span><span class="n">HKEY_CURRENT_USER</span><span class="p">,</span>
<span class="sa">r</span><span class="s1">'Software\Microsoft\Windows\CurrentVersion\Internet Settings'</span><span class="p">)</span>
<span class="n">proxyEnable</span> <span class="o">=</span> <span class="n">winreg</span><span class="o">.</span><span class="n">QueryValueEx</span><span class="p">(</span><span class="n">internetSettings</span><span class="p">,</span>
<span class="s1">'ProxyEnable'</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">proxyOverride</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">winreg</span><span class="o">.</span><span class="n">QueryValueEx</span><span class="p">(</span><span class="n">internetSettings</span><span class="p">,</span>
<span class="s1">'ProxyOverride'</span><span class="p">)[</span><span class="mi">0</span><span class="p">])</span>
<span class="c1"># ^^^^ Returned as Unicode but problems if not converted to ASCII</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">proxyEnable</span> <span class="ow">or</span> <span class="ow">not</span> <span class="n">proxyOverride</span><span class="p">:</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="c1"># try to make a host list from name and IP address.</span>
<span class="n">rawHost</span><span class="p">,</span> <span class="n">port</span> <span class="o">=</span> <span class="n">splitport</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="n">host</span> <span class="o">=</span> <span class="p">[</span><span class="n">rawHost</span><span class="p">]</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">addr</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">gethostbyname</span><span class="p">(</span><span class="n">rawHost</span><span class="p">)</span>
<span class="k">if</span> <span class="n">addr</span> <span class="o">!=</span> <span class="n">rawHost</span><span class="p">:</span>
<span class="n">host</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">addr</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">fqdn</span> <span class="o">=</span> <span class="n">socket</span><span class="o">.</span><span class="n">getfqdn</span><span class="p">(</span><span class="n">rawHost</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fqdn</span> <span class="o">!=</span> <span class="n">rawHost</span><span class="p">:</span>
<span class="n">host</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">fqdn</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="c1"># make a check value list from the registry entry: replace the</span>
<span class="c1"># '<local>' string by the localhost entry and the corresponding</span>
<span class="c1"># canonical entry.</span>
<span class="n">proxyOverride</span> <span class="o">=</span> <span class="n">proxyOverride</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">';'</span><span class="p">)</span>
<span class="c1"># now check if we match one of the registry values.</span>
<span class="k">for</span> <span class="n">test</span> <span class="ow">in</span> <span class="n">proxyOverride</span><span class="p">:</span>
<span class="k">if</span> <span class="n">test</span> <span class="o">==</span> <span class="s1">'<local>'</span><span class="p">:</span>
<span class="k">if</span> <span class="s1">'.'</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">rawHost</span><span class="p">:</span>
<span class="k">return</span> <span class="mi">1</span>
<span class="n">test</span> <span class="o">=</span> <span class="n">test</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s2">"."</span><span class="p">,</span> <span class="sa">r</span><span class="s2">"\."</span><span class="p">)</span> <span class="c1"># mask dots</span>
<span class="n">test</span> <span class="o">=</span> <span class="n">test</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s2">"*"</span><span class="p">,</span> <span class="sa">r</span><span class="s2">".*"</span><span class="p">)</span> <span class="c1"># change glob sequence</span>
<span class="n">test</span> <span class="o">=</span> <span class="n">test</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s2">"?"</span><span class="p">,</span> <span class="sa">r</span><span class="s2">"."</span><span class="p">)</span> <span class="c1"># change glob char</span>
<span class="k">for</span> <span class="n">val</span> <span class="ow">in</span> <span class="n">host</span><span class="p">:</span>
<span class="k">if</span> <span class="n">re</span><span class="o">.</span><span class="n">match</span><span class="p">(</span><span class="n">test</span><span class="p">,</span> <span class="n">val</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">I</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">1</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">proxy_bypass</span><span class="p">(</span><span class="n">host</span><span class="p">):</span>
<span class="sd">"""Return True, if host should be bypassed.</span>
<span class="sd"> Checks proxy settings gathered from the environment, if specified,</span>
<span class="sd"> or the registry.</span>
<span class="sd"> """</span>
<span class="n">proxies</span> <span class="o">=</span> <span class="n">getproxies_environment</span><span class="p">()</span>
<span class="k">if</span> <span class="n">proxies</span><span class="p">:</span>
<span class="k">return</span> <span class="n">proxy_bypass_environment</span><span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">proxies</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="n">proxy_bypass_registry</span><span class="p">(</span><span class="n">host</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># By default use environment variables</span>
<span class="n">getproxies</span> <span class="o">=</span> <span class="n">getproxies_environment</span>
<span class="n">proxy_bypass</span> <span class="o">=</span> <span class="n">proxy_bypass_environment</span>
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