1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
"""Routes WSGI Middleware"""
import re
import logging
from webob import Request
from routes.base import request_config
from routes.util import URLGenerator
log = logging.getLogger('routes.middleware')
class RoutesMiddleware(object):
"""Routing middleware that handles resolving the PATH_INFO in
addition to optionally recognizing method overriding.
.. Note::
This module requires webob to be installed. To depend on it, you may
list routes[middleware] in your ``requirements.txt``
"""
def __init__(self, wsgi_app, mapper, use_method_override=True,
path_info=True, singleton=True):
"""Create a Route middleware object
Using the use_method_override keyword will require Paste to be
installed, and your application should use Paste's WSGIRequest
object as it will properly handle POST issues with wsgi.input
should Routes check it.
If path_info is True, then should a route var contain
path_info, the SCRIPT_NAME and PATH_INFO will be altered
accordingly. This should be used with routes like:
.. code-block:: python
map.connect('blog/*path_info', controller='blog', path_info='')
"""
self.app = wsgi_app
self.mapper = mapper
self.singleton = singleton
self.use_method_override = use_method_override
self.path_info = path_info
self.log_debug = logging.DEBUG >= log.getEffectiveLevel()
if self.log_debug:
log.debug("Initialized with method overriding = %s, and path "
"info altering = %s", use_method_override, path_info)
def __call__(self, environ, start_response):
"""Resolves the URL in PATH_INFO, and uses wsgi.routing_args
to pass on URL resolver results."""
old_method = None
if self.use_method_override:
req = None
# In some odd cases, there's no query string
try:
qs = environ['QUERY_STRING']
except KeyError:
qs = ''
if '_method' in qs:
req = Request(environ)
req.errors = 'ignore'
try:
method = req.GET.get('_method')
except UnicodeDecodeError:
method = None
if method:
old_method = environ['REQUEST_METHOD']
environ['REQUEST_METHOD'] = method.upper()
if self.log_debug:
log.debug("_method found in QUERY_STRING, altering "
"request method to %s",
environ['REQUEST_METHOD'])
elif environ['REQUEST_METHOD'] == 'POST' and is_form_post(environ):
if req is None:
req = Request(environ)
req.errors = 'ignore'
try:
method = req.POST.get('_method')
except UnicodeDecodeError:
method = None
if method:
old_method = environ['REQUEST_METHOD']
environ['REQUEST_METHOD'] = method.upper()
if self.log_debug:
log.debug("_method found in POST data, altering "
"request method to %s",
environ['REQUEST_METHOD'])
# Run the actual route matching
# -- Assignment of environ to config triggers route matching
if self.singleton:
config = request_config()
config.mapper = self.mapper
config.environ = environ
match = config.mapper_dict
route = config.route
else:
results = self.mapper.routematch(environ=environ)
if results:
match, route = results[0], results[1]
else:
match = route = None
if old_method:
environ['REQUEST_METHOD'] = old_method
if not match:
match = {}
if self.log_debug:
urlinfo = "%s %s" % (environ['REQUEST_METHOD'],
environ['PATH_INFO'])
log.debug("No route matched for %s", urlinfo)
elif self.log_debug:
urlinfo = "%s %s" % (environ['REQUEST_METHOD'],
environ['PATH_INFO'])
log.debug("Matched %s", urlinfo)
log.debug("Route path: '%s', defaults: %s", route.routepath,
route.defaults)
log.debug("Match dict: %s", match)
url = URLGenerator(self.mapper, environ)
environ['wsgiorg.routing_args'] = ((url), match)
environ['routes.route'] = route
environ['routes.url'] = url
if route and route.redirect:
route_name = '_redirect_%s' % id(route)
location = url(route_name, **match)
log.debug("Using redirect route, redirect to '%s' with status"
"code: %s", location, route.redirect_status)
start_response(route.redirect_status,
[('Content-Type', 'text/plain; charset=utf8'),
('Location', location)])
return []
# If the route included a path_info attribute and it should be used to
# alter the environ, we'll pull it out
if self.path_info and 'path_info' in match:
oldpath = environ['PATH_INFO']
newpath = match.get('path_info') or ''
environ['PATH_INFO'] = newpath
if not environ['PATH_INFO'].startswith('/'):
environ['PATH_INFO'] = '/' + environ['PATH_INFO']
environ['SCRIPT_NAME'] += re.sub(
r'^(.*?)/' + re.escape(newpath) + '$', r'\1', oldpath)
response = self.app(environ, start_response)
# Wrapped in try as in rare cases the attribute will be gone already
try:
del self.mapper.environ
except AttributeError:
pass
return response
def is_form_post(environ):
"""Determine whether the request is a POSTed html form"""
content_type = environ.get('CONTENT_TYPE', '').lower()
if ';' in content_type:
content_type = content_type.split(';', 1)[0]
return content_type in ('application/x-www-form-urlencoded',
'multipart/form-data')
|
