class DjangoAuthentication(Authentication):
    def is_authenticated(self, request, **kwargs):
        if request.user.is_authenticated():
            return True
        elif 'HTTP_AUTHORIZATION' in request.META:
            import base64
            auth = request.META['HTTP_AUTHORIZATION'].split()
            if len(auth) == 2:
                if auth[0].lower() == "basic":
                    uname, passwd = base64.b64decode(auth[1]).split(':')
                    user = authenticate(username=uname, password=passwd)
                    if user is not None:
                        if user.is_active:
                            login(request, user)
                            request.user = user
                            return True
        return False