diff -r 000000000000 -r 0d40e90630ef web/lib/django/middleware/doc.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/middleware/doc.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,18 @@
+from django.conf import settings
+from django import http
+
+class XViewMiddleware(object):
+    """
+    Adds an X-View header to internal HEAD requests -- used by the documentation system.
+    """
+    def process_view(self, request, view_func, view_args, view_kwargs):
+        """
+        If the request method is HEAD and either the IP is internal or the
+        user is a logged-in staff member, quickly return with an x-header
+        indicating the view function.  This is used by the documentation module
+        to lookup the view function for an arbitrary page.
+        """
+        if request.method == 'HEAD' and (request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS or (request.user.is_authenticated() and request.user.is_staff)):
+            response = http.HttpResponse()
+            response['X-View'] = "%s.%s" % (view_func.__module__, view_func.__name__)
+            return response