生产环境常见的HTTP状态码列表(老男孩整理)

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################################################################生产环境常见的HTTP状态码列表（List of HTTP status codes）为：
说明：求精不求多，有舍才有得 不一样的思维不一样的精彩。《老男孩linux实战培训》也是这个原则。200 - OK，服务器成功返回网页
- Standard response for successful HTTP requests.301 - Moved Permanently（永久跳转），请求的网页已永久跳转到新位置。
- This and all future requests should be directed to the given.403 - Forbidden（禁止访问）,服务器拒绝请求
- forbidden request (matches a deny filter) => HTTP 403
- The request was a legal request, but the server is refusing to respond to it.404 - Not Found,服务器找不到请求的页面。
- The requested resource could not be found but may be available again in the future.500 - Internal Server Error（内部服务器错误）
- internal error in haproxy => HTTP 500
- A generic error message, given when no more specific message is suitable.502 - Bad Gateway（坏的网关）,一般是网关服务器请求后端服务时，后端服务没有按照http协议正确返回结果。
- the server returned an invalid or incomplete response => HTTP 502
- The server was acting as a gateway or proxy and received an invalid response from the upstream server.503 - Service Unavailable（服务当前不可用）,可能因为超载或停机维护。
- no server was available to handle the request => HTTP 503
- The server is currently unavailable (because it is overloaded or down for maintenance).504 - Gateway Timeout（网关超时）,一般是网关服务器请求后端服务时，后端服务没有在特定的时间内完成服务。
- the server failed to reply in time => HTTP 504
- The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.本文出自 “老男孩linux运维” 博客，请务必保留此出处http://oldboy.blog.51cto.com/2561410/716294