import os
from pprint import pformat
from django import http
from django.core import signals
from django.core.handlers.base import BaseHandler
from django.core.urlresolvers import set_script_prefix
from django.utils import datastructures
from django.utils.encoding import force_unicode,smart_str,iri_to_uri
# NOTE: do *not* import settings (or any module which eventually imports
# settings) until after ModPythonHandler has been called; otherwise os.environ
# won't be set up correctly (with respect to settings).
class ModPythonRequest(http.HttpRequest):
def __init__(self, req):
self._req = req
# FIXME: This isn't ideal. The request URI may be encoded (it's
# non-normalized) slightly differently to the "real" SCRIPT_NAME
# and PATH_INFO values. This causes problems when we compute path_info,
# below. For now, don't use script names that will be subject to
# encoding/decoding.
self.path = force_unicode(req.uri)
root = req.get_options().get('django.root', '')
self.django_root = root
# req.path_info isn't necessarily computed correctly in all
# circumstances (it's out of mod_python's control a bit), so we use
# req.uri and some string manipulations to get the right value.
if root and req.uri.startswith(root):
self.path_info = force_unicode(req.uri[len(root):])
else:
self.path_info = self.path
if not self.path_info:
# Django prefers empty paths to be '/', rather than '', to give us
# a common start character for URL patterns. So this is a little
# naughty, but also pretty harmless.
self.path_info = u'/'
self._post_parse_error = False
def __repr__(self):
# Since this is called as part of error handling, we need to be very
# robust against potentially malformed input.
try:
get = pformat(self.GET)
except:
get = '<could not parse>'
if self._post_parse_error:
post = '<could not parse>'
else:
try:
post = pformat(self.POST)
except:
post = '<could not parse>'
try:
cookies = pformat(self.COOKIES)
except:
cookies = '<could not parse>'
try:
meta = pformat(self.META)
except:
meta = '<could not parse>'
return smart_str(u'<ModPythonRequest\npath:%s,\nGET:%s,\nPOST:%s,\nCOOKIES:%s,\nMETA:%s>' %
(self.path, unicode(get), unicode(post),
unicode(cookies), unicode(meta)))
def get_full_path(self):
# RFC 3986 requires self._req.args to be in the ASCII range, but this
# doesn't always happen, so rather than crash, we defensively encode it.
return '%s%s' % (self.path, self._req.args and ('?' + iri_to_uri(self._req.args)) or '')
def is_secure(self):
try:
return self._req.is_https()
except AttributeError:
# mod_python < 3.2.10 doesn't have req.is_https().
return self._req.subprocess_env.get('HTTPS', '').lower() in ('on', '1')
def _load_post_and_files(self):
"Populates self._post and self._files"
if self.method != 'POST':
self._post, self._files = http.QueryDict('', encoding=self._encoding), datastructures.MultiValueDict()
return
if 'content-type' in self._req.headers_in and self._req.headers_in['content-type'].startswith('multipart'):
self._raw_post_data = ''
try:
self._post, self._files = self.parse_file_upload(self.META, self._req)
except:
# See django.core.handlers.wsgi.WSGIHandler for an explanation
# of what's going on here.
self._post = http.QueryDict('')
self._files = datastructures.MultiValueDict()
self._post_parse_error = True
raise
else:
self._post, self._files = http.QueryDict(self.raw_post_data, encoding=self._encoding), datastructures.MultiValueDict()
def _get_request(self):
if not hasattr(self, '_request'):
self._request = datastructures.MergeDict(self.POST, self.GET)
return self._request
def _get_get(self):
if not hasattr(self, '_get'):
self._get = http.QueryDict(self._req.args, encoding=self._encoding)
return self._get
def _set_get(self, get):
self._get = get
def _get_post(self):
if not hasattr(self, '_post'):
self._load_post_and_files()
return self._post
def _set_post(self, post):
self._post = post
def _get_cookies(self):
if not hasattr(self, '_cookies'):
self._cookies = http.parse_cookie(self._req.headers_in.get('cookie', ''))
return self._cookies
def _set_cookies(self, cookies):
self._cookies = cookies
def _get_files(self):
if not hasattr(self, '_files'):
self._load_post_and_files()
return self._files
def _get_meta(self):
"Lazy loader that returns self.META dictionary"
if not hasattr(self, '_meta'):
self._meta = {
'AUTH_TYPE': self._req.ap_auth_type,
'CONTENT_LENGTH': self._req.headers_in.get('content-length', 0),
'CONTENT_TYPE': self._req.headers_in.get('content-type'),
'GATEWAY_INTERFACE': 'CGI/1.1',
'PATH_INFO': self.path_info,
'PATH_TRANSLATED': None, # Not supported
'QUERY_STRING': self._req.args,
'REMOTE_ADDR': self._req.connection.remote_ip,
'REMOTE_HOST': None, # DNS lookups not supported
'REMOTE_IDENT': self._req.connection.remote_logname,
'REMOTE_USER': self._req.user,
'REQUEST_METHOD': self._req.method,
'SCRIPT_NAME': self.django_root,
'SERVER_NAME': self._req.server.server_hostname,
'SERVER_PORT': self._req.connection.local_addr[1],
'SERVER_PROTOCOL': self._req.protocol,
'SERVER_SOFTWARE': 'mod_python'
}
for key, value in self._req.headers_in.items():
key = 'HTTP_' + key.upper().replace('-', '_')
self._meta[key] = value
return self._meta
def _get_raw_post_data(self):
try:
return self._raw_post_data
except AttributeError:
self._raw_post_data = self._req.read()
return self._raw_post_data
def _get_method(self):
return self.META['REQUEST_METHOD'].upper()
GET = property(_get_get, _set_get)
POST = property(_get_post, _set_post)
COOKIES = property(_get_cookies, _set_cookies)
FILES = property(_get_files)
META = property(_get_meta)
REQUEST = property(_get_request)
raw_post_data = property(_get_raw_post_data)
method = property(_get_method)
class ModPythonHandler(BaseHandler):
request_class = ModPythonRequest
def __call__(self, req):
# mod_python fakes the environ, and thus doesn't process SetEnv. This fixes that
os.environ.update(req.subprocess_env)
# now that the environ works we can see the correct settings, so imports
# that use settings now can work
from django.conf import settings
# if we need to set up middleware, now that settings works we can do it now.
if self._request_middleware is None:
self.load_middleware()
set_script_prefix(req.get_options().get('django.root', ''))
signals.request_started.send(sender=self.__class__)
try:
try:
request = self.request_class(req)
except UnicodeDecodeError:
response = http.HttpResponseBadRequest()
else:
response = self.get_response(request)
# Apply response middleware
for middleware_method in self._response_middleware:
response = middleware_method(request, response)
response = self.apply_response_fixes(request, response)
finally:
signals.request_finished.send(sender=self.__class__)
# Convert our custom HttpResponse object back into the mod_python req.
req.content_type = response['Content-Type']
for key, value in response.items():
if key != 'content-type':
req.headers_out[str(key)] = str(value)
for c in response.cookies.values():
req.headers_out.add('Set-Cookie', c.output(header=''))
req.status = response.status_code
try:
for chunk in response:
req.write(chunk)
finally:
response.close()
return 0 # mod_python.apache.OK
def handler(req):
# mod_python hooks into this function.
return ModPythonHandler()(req)
|