HTTP狀態(tài)碼(HTTP Status Code) 是用以表示網(wǎng)頁服務(wù)器 HTTP響應(yīng)狀態(tài)的3位數(shù)字代碼。它由 RFC 2616 規(guī)范定義的，并得到RFC 2518、RFC 2817、RFC 2295、RFC 2774、RFC 4918等規(guī)范擴展。
1 消息（1字頭）
? 100 Continue
? 101 Switching Protocols
? 102 Processing
2 成功（2字頭）
? 200 OK
? 201 Created
? 202 Accepted
? 203 Non-Authoritative Information
? 204 No Content
? 205 Reset Content
? 206 Partial Content
? 207 Multi-Status
3 重定向（3字頭）
? 300 Multiple Choices
? 301 Moved Permanently
? 302 Move temporarily
? 303 See Other
? 304 Not Modified
? 305 Use Proxy
? 306 Switch Proxy
? 307 Temporary Redirect
4 請求錯誤（4字頭）
? 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
? 422 Unprocessable Entity
? 423 Locked
? 424 Failed Dependency
? 425 Unordered Collection
? 426 Upgrade Required
? 449 Retry With
? 451Unavailable For Legal Reasons
5 服務(wù)器錯誤（5、6字頭）
? 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
