def __call__(self, env, start_response):
        req = Request(env)
        if self.memcache_client is None:
            self.memcache_client = cache_from_env(env)
        if not self.memcache_client:
            self.logger.warning(
                _('Warning: Cannot ratelimit without a memcached client'))
            return self.app(env, start_response)
        try:
            version, account, container, obj = req.split_path(1, 4, True)
        except ValueError:
            return self.app(env, start_response)
        ratelimit_resp = self.handle_ratelimit(req, account, container, obj)
        if ratelimit_resp is None:
            return self.app(env, start_response)
        else:
            return ratelimit_resp(env, start_response)
WSGI entry point.
dataset/ETHPy150Open openstack/swift/swift/common/middleware/ratelimit.py/RateLimitMiddleware.__call__