我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用django.contrib.auth.load_backend()。
def _login_user(request, user): """ Log in a user without requiring credentials (using ``login`` from ``django.contrib.auth``, first finding a matching backend). """ from django.contrib.auth import load_backend, login if not hasattr(user, 'backend'): for backend in settings.AUTHENTICATION_BACKENDS: if user == load_backend(backend).get_user(user.pk): user.backend = backend break if hasattr(user, 'backend'): return login(request, user)
def clean_username(self, username, request): """ Allows the backend to clean the username, if the backend defines a clean_username method. """ backend_str = request.session[auth.BACKEND_SESSION_KEY] backend = auth.load_backend(backend_str) try: username = backend.clean_username(username) except AttributeError: # Backend has no clean_username method. pass return username
def _remove_invalid_user(self, request): """ Removes the current authenticated user in the request which is invalid but only if the user is authenticated via the RemoteUserBackend. """ try: stored_backend = load_backend(request.session.get(auth.BACKEND_SESSION_KEY, '')) except ImportError: # backend failed to load auth.logout(request) else: if isinstance(stored_backend, RemoteUserBackend): auth.logout(request)
def authenticate(self, token_value): """Check that the password is valid. This allows for revoking of a user's preview rights by changing the valid passwords. """ try: backend_path, user_id = token_value.split(':', 1) except (ValueError, AttributeError): return False backend = auth.load_backend(backend_path) return bool(backend.get_user(user_id))
def force_login(self, user, backend=None): def get_backend(): from django.contrib.auth import load_backend for backend_path in settings.AUTHENTICATION_BACKENDS: backend = load_backend(backend_path) if hasattr(backend, 'get_user'): return backend_path if backend is None: backend = get_backend() user.backend = backend self._login(user, backend)
def process_request(self, request): # AuthenticationMiddleware is required so that request.user exists. if not hasattr(request, 'user'): raise ImproperlyConfigured( "The Django remote user auth middleware requires the" " authentication middleware to be installed. Edit your" " MIDDLEWARE_CLASSES setting to insert" " 'django.contrib.auth.middleware.AuthenticationMiddleware'" " before the RemoteUserMiddleware class.") try: username = request.META[self.header] except KeyError: # If specified header doesn't exist then remove any existing # authenticated remote-user, or return (leaving request.user set to # AnonymousUser by the AuthenticationMiddleware). if request.user.is_authenticated(): try: stored_backend = load_backend(request.session.get( auth.BACKEND_SESSION_KEY, '')) if isinstance(stored_backend, RemoteUserBackend): auth.logout(request) except ImproperlyConfigured as e: # backend failed to load auth.logout(request) return # If the user is already authenticated and that user is the user we are # getting passed in the headers, then the correct user is already # persisted in the session and we don't need to continue. if request.user.is_authenticated(): if request.user.get_username() == self.clean_username(username, request): return # We are seeing this user for the first time in this session, attempt # to authenticate the user. user = auth.authenticate(remote_user=username) if user: # User is valid. Set request.user and persist user in the session # by logging the user in. request.user = user auth.login(request, user)
def clean_id(self, request): """ Allows the backend to clean the user id, if the backend defines a clean_id method. """ backend_str = request.session[auth.BACKEND_SESSION_KEY] backend = load_backend(backend_str) try: user_id = backend.clean_id(request) except AttributeError: # Backend has no clean_id method. pass return user_id
