added all server files

1 files changed, 174 insertions, 0 deletions

diff --git a/lib/python2.7/site-packages/django/middleware/common.py b/lib/python2.7/site-packages/django/middleware/common.py
new file mode 100644
index 0000000..2c76c47
--- /dev/null
+++ b/lib/python2.7/site-packages/django/middleware/common.py
@@ -0,0 +1,174 @@
+import hashlib
+import logging
+import re
+import warnings
+
+from django.conf import settings
+from django.core.mail import mail_managers
+from django.core import urlresolvers
+from django import http
+from django.utils.encoding import force_text
+from django.utils.http import urlquote
+from django.utils import six
+
+
+logger = logging.getLogger('django.request')
+
+
+class CommonMiddleware(object):
+    """
+    "Common" middleware for taking care of some basic operations:
+
+        - Forbids access to User-Agents in settings.DISALLOWED_USER_AGENTS
+
+        - URL rewriting: Based on the APPEND_SLASH and PREPEND_WWW settings,
+          this middleware appends missing slashes and/or prepends missing
+          "www."s.
+
+            - If APPEND_SLASH is set and the initial URL doesn't end with a
+              slash, and it is not found in urlpatterns, a new URL is formed by
+              appending a slash at the end. If this new URL is found in
+              urlpatterns, then an HTTP-redirect is returned to this new URL;
+              otherwise the initial URL is processed as usual.
+
+        - ETags: If the USE_ETAGS setting is set, ETags will be calculated from
+          the entire page content and Not Modified responses will be returned
+          appropriately.
+    """
+
+    def process_request(self, request):
+        """
+        Check for denied User-Agents and rewrite the URL based on
+        settings.APPEND_SLASH and settings.PREPEND_WWW
+        """
+
+        # Check for denied User-Agents
+        if 'HTTP_USER_AGENT' in request.META:
+            for user_agent_regex in settings.DISALLOWED_USER_AGENTS:
+                if user_agent_regex.search(request.META['HTTP_USER_AGENT']):
+                    logger.warning('Forbidden (User agent): %s', request.path,
+                        extra={
+                            'status_code': 403,
+                            'request': request
+                        }
+                    )
+                    return http.HttpResponseForbidden('<h1>Forbidden</h1>')
+
+        # Check for a redirect based on settings.APPEND_SLASH
+        # and settings.PREPEND_WWW
+        host = request.get_host()
+        old_url = [host, request.path]
+        new_url = old_url[:]
+
+        if (settings.PREPEND_WWW and old_url[0] and
+                not old_url[0].startswith('www.')):
+            new_url[0] = 'www.' + old_url[0]
+
+        # Append a slash if APPEND_SLASH is set and the URL doesn't have a
+        # trailing slash and there is no pattern for the current path
+        if settings.APPEND_SLASH and (not old_url[1].endswith('/')):
+            urlconf = getattr(request, 'urlconf', None)
+            if (not urlresolvers.is_valid_path(request.path_info, urlconf) and
+                    urlresolvers.is_valid_path("%s/" % request.path_info, urlconf)):
+                new_url[1] = new_url[1] + '/'
+                if settings.DEBUG and request.method == 'POST':
+                    raise RuntimeError((""
+                    "You called this URL via POST, but the URL doesn't end "
+                    "in a slash and you have APPEND_SLASH set. Django can't "
+                    "redirect to the slash URL while maintaining POST data. "
+                    "Change your form to point to %s%s (note the trailing "
+                    "slash), or set APPEND_SLASH=False in your Django "
+                    "settings.") % (new_url[0], new_url[1]))
+
+        if new_url == old_url:
+            # No redirects required.
+            return
+        if new_url[0]:
+            newurl = "%s://%s%s" % (
+                'https' if request.is_secure() else 'http',
+                new_url[0], urlquote(new_url[1]))
+        else:
+            newurl = urlquote(new_url[1])
+        if request.META.get('QUERY_STRING', ''):
+            if six.PY3:
+                newurl += '?' + request.META['QUERY_STRING']
+            else:
+                # `query_string` is a bytestring. Appending it to the unicode
+                # string `newurl` will fail if it isn't ASCII-only. This isn't
+                # allowed; only broken software generates such query strings.
+                # Better drop the invalid query string than crash (#15152).
+                try:
+                    newurl += '?' + request.META['QUERY_STRING'].decode()
+                except UnicodeDecodeError:
+                    pass
+        return http.HttpResponsePermanentRedirect(newurl)
+
+    def process_response(self, request, response):
+        """
+        Calculate the ETag, if needed.
+        """
+        if settings.SEND_BROKEN_LINK_EMAILS:
+            warnings.warn("SEND_BROKEN_LINK_EMAILS is deprecated. "
+                "Use BrokenLinkEmailsMiddleware instead.",
+                PendingDeprecationWarning, stacklevel=2)
+            BrokenLinkEmailsMiddleware().process_response(request, response)
+
+        if settings.USE_ETAGS:
+            if response.has_header('ETag'):
+                etag = response['ETag']
+            elif response.streaming:
+                etag = None
+            else:
+                etag = '"%s"' % hashlib.md5(response.content).hexdigest()
+            if etag is not None:
+                if (200 <= response.status_code < 300
+                    and request.META.get('HTTP_IF_NONE_MATCH') == etag):
+                    cookies = response.cookies
+                    response = http.HttpResponseNotModified()
+                    response.cookies = cookies
+                else:
+                    response['ETag'] = etag
+
+        return response
+
+
+class BrokenLinkEmailsMiddleware(object):
+
+    def process_response(self, request, response):
+        """
+        Send broken link emails for relevant 404 NOT FOUND responses.
+        """
+        if response.status_code == 404 and not settings.DEBUG:
+            domain = request.get_host()
+            path = request.get_full_path()
+            referer = force_text(request.META.get('HTTP_REFERER', ''), errors='replace')
+
+            if not self.is_ignorable_request(request, path, domain, referer):
+                ua = request.META.get('HTTP_USER_AGENT', '<none>')
+                ip = request.META.get('REMOTE_ADDR', '<none>')
+                mail_managers(
+                    "Broken %slink on %s" % (
+                        ('INTERNAL ' if self.is_internal_request(domain, referer) else ''),
+                        domain
+                    ),
+                    "Referrer: %s\nRequested URL: %s\nUser agent: %s\n"
+                    "IP address: %s\n" % (referer, path, ua, ip),
+                    fail_silently=True)
+        return response
+
+    def is_internal_request(self, domain, referer):
+        """
+        Returns True if the referring URL is the same domain as the current request.
+        """
+        # Different subdomains are treated as different domains.
+        return bool(re.match("^https?://%s/" % re.escape(domain), referer))
+
+    def is_ignorable_request(self, request, uri, domain, referer):
+        """
+        Returns True if the given request *shouldn't* notify the site managers.
+        """
+        # '?' in referer is identified as search engine source
+        if (not referer or
+                (not self.is_internal_request(domain, referer) and '?' in referer)):
+            return True
+        return any(pattern.search(uri) for pattern in settings.IGNORABLE_404_URLS)