102 lines
3.5 KiB
Python
102 lines
3.5 KiB
Python
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from django.contrib.auth.models import AnonymousUser as DjangoAnonymousUser, Permission
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from django.contrib.auth.context_processors import auth as _auth
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from django.contrib.auth import get_user as _get_user
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from django.utils.functional import SimpleLazyObject
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from openslides.config.api import config
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class AnonymousUser(DjangoAnonymousUser):
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"""
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Class for anonymous user instances, which have the permissions from the
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Group 'Anonymous' (pk=1).
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"""
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def get_all_permissions(self, obj=None):
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"""
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Return the permissions a user is granted by his group membership(s).
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Try to return the permissions for the 'Anonymous' group (pk=1).
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"""
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perms = Permission.objects.filter(group__pk=1)
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if perms is None:
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return set()
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# TODO: test without order_by()
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perms = perms.values_list('content_type__app_label', 'codename').order_by()
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return set(['%s.%s' % (content_type, codename) for content_type, codename in perms])
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def has_perm(self, perm, obj=None):
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"""
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Check if the user has a specific permission
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"""
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return (perm in self.get_all_permissions())
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def has_module_perms(self, app_label):
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"""
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Check if the user has permissions on the module app_label
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"""
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for perm in self.get_all_permissions():
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if perm[:perm.index('.')] == app_label:
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return True
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return False
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class AuthenticationMiddleware(object):
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"""
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Middleware to get the logged in user in users.
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Uses AnonymousUser instead of the django anonymous user.
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"""
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def process_request(self, request):
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"""
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Like django.contrib.auth.middleware.AuthenticationMiddleware, but uses
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our own get_user function.
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"""
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assert hasattr(request, 'session'), (
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"The authentication middleware requires session middleware "
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"to be installed. Edit your MIDDLEWARE_CLASSES setting to insert "
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"'django.contrib.sessions.middleware.SessionMiddleware' before "
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"'openslides.users.auth.AuthenticationMiddleware'."
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)
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request.user = SimpleLazyObject(lambda: get_user(request))
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def get_user(request):
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"""
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Gets the user from the request.
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This is a mix of django.contrib.auth.get_user and
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django.contrib.auth.middleware.get_user which uses our anonymous user.
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"""
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try:
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return_user = request._cached_user
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except AttributeError:
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# Get the user. If it is a DjangoAnonymousUser, then use our AnonymousUser
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return_user = _get_user(request)
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if config['system_enable_anonymous'] and isinstance(return_user, DjangoAnonymousUser):
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return_user = AnonymousUser()
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request._cached_user = return_user
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return return_user
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def auth(request):
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"""
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Contextmanager to handle auth.
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Uses the django auth context manager to fill the context.
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Alters the attribute user if the user is not authenticated.
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"""
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# Call the django standard auth function, like 'super()'
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context = _auth(request)
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# Change the django anonymous user with our anonymous user if anonymous auth
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# is enabled
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if config['system_enable_anonymous'] and isinstance(context['user'], DjangoAnonymousUser):
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context['user'] = AnonymousUser()
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# Set a context variable that will indicate if anonymous login is possible
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context['os_enable_anonymous_login'] = config['system_enable_anonymous']
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return context
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