Introduce dynamic scope_path regexps
Instead of relying on scope_path's being "one slash deep", we should
instead allow for either:
1. scope_paths that have a pre-defined depth
2. scope_paths that can be arbitrarily deep
We achieve 1 by setting an entities scope_logic to another logic
module. We then recursively call getScopeDepth until we get to the
topmost entity (that is, an unscoped entity).
A little different is the solution to 2, since some entities can have
an arbitrarily deep scope (such as Documents), we need to have some
way of signaling this to getScopePattern. A clean solution is to
return None, rather than a number. If None is returned, the
SCOPE_PATH_ARG_PATTERN is returned as regexp instead, which will
match an arbitrarily deeply nested scope.
The solution for 2 requires that we return None somewhere in the
scope_logic chain, the most straight forward method to do so is to
override getScopeDepth anywhere such a scope is needed and make it
return None. A more elegant solution however, is to set the
scope_logic to that module in all entities that require it.
Patch by: Sverre Rabbelier
"""
Pages in Django can are served up with custom HTTP headers containing useful
information about those pages -- namely, the content type and object ID.
This module contains utility functions for retrieving and doing interesting
things with these special "X-Headers" (so called because the HTTP spec demands
that custom headers are prefixed with "X-").
Next time you're at slashdot.org, watch out for X-Fry and X-Bender. :)
"""
def populate_xheaders(request, response, model, object_id):
"""
Adds the "X-Object-Type" and "X-Object-Id" headers to the given
HttpResponse according to the given model and object_id -- but only if the
given HttpRequest object has an IP address within the INTERNAL_IPS setting
or if the request is from a logged in staff member.
"""
from django.conf import settings
if (request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS
or (hasattr(request, 'user') and request.user.is_authenticated()
and request.user.is_staff)):
response['X-Object-Type'] = "%s.%s" % (model._meta.app_label, model._meta.object_name.lower())
response['X-Object-Id'] = str(object_id)