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"""Native adapter for serving CherryPy via mod_python"""
import cherrypy
from cherrypy._cperror import format_exc, bare_error
from cherrypy.lib import http
# ------------------------------ Request-handling
def setup(req):
# Run any setup function defined by a "PythonOption cherrypy.setup" directive.
options = req.get_options()
if 'cherrypy.setup' in options:
modname, fname = options['cherrypy.setup'].split('::')
mod = __import__(modname, globals(), locals(), [fname])
func = getattr(mod, fname)
func()
cherrypy.config.update({'log.screen': False})
if cherrypy.engine.state == cherrypy._cpengine.STOPPED:
cherrypy.engine.start(blocking=False)
elif cherrypy.engine.state == cherrypy._cpengine.STARTING:
cherrypy.engine.wait()
def cherrypy_cleanup(data):
cherrypy.engine.stop()
try:
from mod_python import apache
# apache.register_cleanup wasn't available until 3.1.4.
apache.register_cleanup(cherrypy_cleanup)
except AttributeError:
req.server.register_cleanup(req, cherrypy_cleanup)
class _ReadOnlyRequest:
expose = ('read', 'readline', 'readlines')
def __init__(self, req):
for method in self.expose:
self.__dict__[method] = getattr(req, method)
_isSetUp = False
def handler(req):
from mod_python import apache
try:
global _isSetUp
if not _isSetUp:
setup(req)
_isSetUp = True
# Obtain a Request object from CherryPy
local = req.connection.local_addr
local = http.Host(local[0], local[1], req.connection.local_host or "")
remote = req.connection.remote_addr
remote = http.Host(remote[0], remote[1], req.connection.remote_host or "")
scheme = req.parsed_uri[0] or 'http'
request = cherrypy.engine.request(local, remote, scheme)
req.get_basic_auth_pw()
request.login = req.user
try:
# apache.mpm_query only became available in mod_python 3.1
q = apache.mpm_query
threaded = q(apache.AP_MPMQ_IS_THREADED)
forked = q(apache.AP_MPMQ_IS_FORKED)
except AttributeError:
bad_value = ("You must provide a PythonOption '%s', "
"either 'on' or 'off', when running a version "
"of mod_python < 3.1")
threaded = options.get('multithread', '').lower()
if threaded == 'on':
threaded = True
elif threaded == 'off':
threaded = False
else:
raise ValueError(bad_value % "multithread")
forked = options.get('multiprocess', '').lower()
if forked == 'on':
forked = True
elif forked == 'off':
forked = False
else:
raise ValueError(bad_value % "multiprocess")
request.multithread = bool(threaded)
request.multiprocess = bool(forked)
sn = cherrypy.tree.script_name(req.uri or "/")
if sn is None:
send_response(req, '404 Not Found', [], '')
else:
request.app = cherrypy.tree.apps[sn]
# Run the CherryPy Request object and obtain the response
headers = req.headers_in.items()
rfile = _ReadOnlyRequest(req)
response = request.run(req.method, req.uri, req.args or "",
req.protocol, headers, rfile)
send_response(req, response.status, response.header_list, response.body)
request.close()
except:
tb = format_exc()
cherrypy.log(tb)
s, h, b = bare_error()
send_response(req, s, h, b)
return apache.OK
def send_response(req, status, headers, body):
# Set response status
req.status = int(status[:3])
# Set response headers
req.content_type = "text/plain"
for header, value in headers:
if header.lower() == 'content-type':
req.content_type = value
continue
req.headers_out.add(header, value)
# Set response body
if isinstance(body, basestring):
req.write(body)
else:
for seg in body:
req.write(seg)
# --------------- Startup tools for CherryPy + mod_python --------------- #
import os
import re
def read_process(cmd, args=""):
pipein, pipeout = os.popen4("%s %s" % (cmd, args))
try:
firstline = pipeout.readline()
if (re.search(r"(not recognized|No such file|not found)", firstline,
re.IGNORECASE)):
raise IOError('%s must be on your system path.' % cmd)
output = firstline + pipeout.read()
finally:
pipeout.close()
return output
class ModPythonServer(object):
template = """
# Apache2 server configuration file for running CherryPy with mod_python.
DocumentRoot "/"
Listen %(port)s
LoadModule python_module modules/mod_python.so
<Location %(loc)s>
SetHandler python-program
PythonHandler %(handler)s
PythonDebug On
%(opts)s
</Location>
"""
def __init__(self, loc="/", port=80, opts=None, apache_path="apache",
handler="cherrypy._cpmodpy::handler"):
self.loc = loc
self.port = port
self.opts = opts
self.apache_path = apache_path
self.handler = handler
def start(self):
opts = "".join([" PythonOption %s %s\n" % (k, v)
for k, v in self.opts])
conf_data = self.template % {"port": self.port,
"loc": self.loc,
"opts": opts,
"handler": self.handler,
}
mpconf = os.path.join(os.path.dirname(__file__), "cpmodpy.conf")
f = open(mpconf, 'wb')
try:
f.write(conf_data)
finally:
f.close()
response = read_process(self.apache_path, "-k start -f %s" % mpconf)
self.ready = True
return response
def stop(self):
os.popen("apache -k stop")
self.ready = False
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