middleware.py 文件源码

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