1 from django.contrib.redirects.models import Redirect

     2 from django import http

     3 from django.conf import settings

     4 

     5 class RedirectFallbackMiddleware(object):

     6     def process_response(self, request, response):

     7         if response.status_code != 404:

     8             return response # No need to check for a redirect for non-404 responses.

     9         path = request.get_full_path()

    10         try:

    11             r = Redirect.objects.get(site__id__exact=settings.SITE_ID, old_path=path)

    12         except Redirect.DoesNotExist:

    13             r = None

    14         if r is None and settings.APPEND_SLASH:

    15             # Try removing the trailing slash.

    16             try:

    17                 r = Redirect.objects.get(site__id__exact=settings.SITE_ID,

    18                     old_path=path[:path.rfind('/')]+path[path.rfind('/')+1:])

    19             except Redirect.DoesNotExist:

    20                 pass

    21         if r is not None:

    22             if r.new_path == '':

    23                 return http.HttpResponseGone()

    24             return http.HttpResponsePermanentRedirect(r.new_path)

    25 

    26         # No redirect was found. Return the response.

    27         return response