5×× 服务器错误

502 Bad Gateway 错误网关

服务器在充当网关或代理时，从尝试完成请求时访问的入站服务器接收到无效响应。

• Source: RFC7231 Section 6.6.3

502 代码参考

Rails HTTP Status Symbol :bad_gateway

Go HTTP Status Constant http.StatusBadGateway

Symfony HTTP Status Constant Response::HTTP_BAD_GATEWAY

Python2 HTTP Status Constant httplib.BAD_GATEWAY

Python3+ HTTP Status Constant http.client.BAD_GATEWAY

Python3.5+ HTTP Status Constant http.HTTPStatus.BAD_GATEWAY