middleware.py 文件源码

def process_exception(self, request, exception):
        """When we get a CasTicketException, that is probably caused by the ticket timing out.
        So logout/login and get the same page again."""
        if isinstance(exception, CasTicketException):
            do_logout(request)
            # This assumes that request.path requires authentication.
            return HttpResponseRedirect(request.path)
        else:
            return None