Source Code for Module django.contrib.auth.middleware

 1 -class LazyUser(object): 
 2 -    def __get__(self, request, obj_type=None): 
 3          if not hasattr(request, '_cached_user'): 
 4              from django.contrib.auth import get_user 
 5              request._cached_user = get_user(request) 
 6          return request._cached_user 
 7   
 8 -class AuthenticationMiddleware(object): 
 9 -    def process_request(self, request): 
10          assert hasattr(request, 'session'), "The Django authentication middleware requires session middleware to be installed. Edit your MIDDLEWARE_CLASSES setting to insert 'django.contrib.sessions.middleware.SessionMiddleware'." 
11          request.__class__.user = LazyUser() 
12          return None 
13