Added a permission denied page.

wiki/decorators.py

 # -*- coding: utf-8 -*-
 from django.conf import settings as django_settings
 from django.core.urlresolvers import reverse
-from django.shortcuts import redirect, get_object_or_404
+from django.shortcuts import redirect, get_object_or_404, render_to_response
+from django.template.context import RequestContext
 from django.http import HttpResponse, HttpResponseNotFound
 from django.utils import simplejson as json
 
@@ -81,15 +82,17 @@ def get_article(func=None, can_read=True, can_write=False, deleted_contents=Fals
             if request.user.is_anonymous():
                 return redirect(django_settings.LOGIN_URL)
             else:
+                c = RequestContext(request, {'urlpath' : urlpath})
+                return render_to_response("wiki/permission_denied.html", context_instance=c)
                 pass
-                # TODO: Return a permission denied page
         
         if can_write and not article.can_write(request.user):
             if request.user.is_anonymous():
                 return redirect(django_settings.LOGIN_URL)
             else:
+                c = RequestContext(request, {'urlpath' : urlpath})
+                return render_to_response("wiki/permission_denied.html", context_instance=c)
                 pass
-                # TODO: Return a permission denied page
 
         # If the article has been deleted, show a special page.
         if not deleted_contents and article.current_revision and article.current_revision.deleted:

wiki/templates/wiki/permission_denied.html

+{% extends "wiki/base.html" %}
+{% load wiki_tags i18n %}
+{% load url from future %}
+
+{% block pagetitle %}Permission Denied{% endblock %}
+
+{% block wiki_contents %}
+
+  <h1>Permission Denied</h2>
+  <p>Sorry, you don't have permission to view this page.</p>
+
+{% endblock %}
+