消息
100 Continue
101 Switching Protocols 102 Processing 成功 200 OK 201 Created 202 Accepted 203 Non-Authoritative Information 204 No Content 205 Reset Content 206 Partial Content 207 Multi-Status 重定向 300 Multiple Choices 301 Moved Permanently 302 Move temporarily 303 See Other 304 Not Modified 305 Use Proxy 306 Switch Proxy 307 Temporary Redirect 请求错误 400 Bad Request 401 Unauthorized 402 Payment Required 403 Forbidden 404 Not Found 405 Method Not Allowed 406 Not Acceptable 407 Proxy Authentication Required 408 Request Timeout 409 Conflict 410 Gone 411 Length Required 412 Precondition Failed 413 Request Entity Too Large 414 Request-URI Too Long 415 Unsupported Media Type 416 Requested Range Not Satisfiable 417 Expectation Failed 421 too many connections 422 Unprocessable Entity 423 Locked 424 Failed Dependency 425 Unordered Collection 426 Upgrade Required 449 Retry With 451Unavailable For Legal Reasons 服务器错误 500 Internal Server Error 501 Not Implemented 502 Bad Gateway 503 Service Unavailable 504 Gateway Timeout 505 HTTP Version Not Supported 506 Variant Also Negotiates 507 Insufficient Storage 509 Bandwidth Limit Exceeded 510 Not Extended 600 Unparseable Response Headers