from django.http import HttpResponseRedirect
from django.conf import settings
from re import compile
EXEMPT_URLS = [compile(settings.LOGIN_URL.lstrip('/'))]
if hasattr(settings, 'LOGIN_EXEMPT_URLS'):
EXEMPT_URLS += [compile(expr) for expr in settings.LOGIN_EXEMPT_URLS]
class LoginRequiredMiddleware:
"""
Middleware that requires a user to be authenticated to view any page other
than LOGIN_URL. Exemptions to this requirement can optionally be specified
in settings via a list of regular expressions in LOGIN_EXEMPT_URLS (which
you can copy from your urls.py).
Requires authentication middleware and template context processors to be
loaded. You'll get an error if they aren't.
"""
def process_request(self, request):
assert hasattr(request, 'user'), "The Login Required middleware\
requires authentication middleware to be installed. Edit your\
MIDDLEWARE_CLASSES setting to insert\
'django.contrib.auth.middleware.AuthenticationMiddleware'. If that doesn't\
work, ensure your TEMPLATE_CONTEXT_PROCESSORS setting includes\
'django.core.context_processors.auth'."
if not request.user.is_authenticated():
path = request.path_info.lstrip('/')
if not any(m.match(path) for m in EXEMPT_URLS):
return HttpResponseRedirect(settings.LOGIN_URL)