List of HTTP status codes HTTP状态码

（重定向自HTTP status codes）

HTTP-Statuscode 403 Beispiel einer Antwort bei verstelltem Zugriff

418 I'm a teapot (RFC 2324)

This code was defined in 1998 as one of the traditional IETF April Fools' jokes, in RFC 2324, Hyper Text Coffee Pot Control Protocol, and is not expected to be implemented by actual HTTP servers. The RFC specifies this code should be returned by tea pots requested to brew coffee. This HTTP status is used as an easter egg in some websites, including Google.com.

421 Misdirected Request (RFC 7540)

The request was directed at a server that is not able to produce a response (for example because a connection reuse).

422 Unprocessable Entity (WebDAV; RFC 4918)

The request was well-formed but was unable to be followed due to semantic errors.

423 Locked (WebDAV; RFC 4918)

The resource that is being accessed is locked.

424 Failed Dependency (WebDAV; RFC 4918)

The request failed due to failure of a previous request (e.g., a PROPPATCH).

426 Upgrade Required

The client should switch to a different protocol such as TLS/1.0, given in the Upgrade header field.

428 Precondition Required (RFC 6585)

The origin server requires the request to be conditional. Intended to prevent "the 'lost update' problem, where a client GETs a resource's state, modifies it, and PUTs it back to the server, when meanwhile a third party has modified the state on the server, leading to a conflict."

429 Too Many Requests (RFC 6585)

The user has sent too many requests in a given amount of time. Intended for use with rate limiting schemes.

431 Request Header Fields Too Large (RFC 6585)

The server is unwilling to process the request because either an individual header field, or all the header fields collectively, are too large.

451 Unavailable For Legal Reasons

A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource. The code 451 was chosen as a reference to the novel Fahrenheit 451.

单词	HTTP status codes
释义	HTTP status codes 中文百科 HTTP状态码 List of HTTP status codes （重定向自HTTP status codes） HTTP状态码（英语：HTTP Status Code）是用以表示网页服务器HTTP响应状态的3位数字代码。它由 RFC 2616 规范定义的，并得到 RFC 2518、RFC 2817、RFC 2295、RFC 2774 与 RFC 4918 等规范扩展。所有状态码的第一个数字代表了响应的五种状态之一。英语百科 List of HTTP status codes HTTP状态码（重定向自HTTP status codes） 418 I'm a teapot (RFC 2324) This code was defined in 1998 as one of the traditional IETF April Fools' jokes, in RFC 2324, Hyper Text Coffee Pot Control Protocol, and is not expected to be implemented by actual HTTP servers. The RFC specifies this code should be returned by tea pots requested to brew coffee. This HTTP status is used as an easter egg in some websites, including Google.com. 421 Misdirected Request (RFC 7540) The request was directed at a server that is not able to produce a response (for example because a connection reuse). 422 Unprocessable Entity (WebDAV; RFC 4918) The request was well-formed but was unable to be followed due to semantic errors. 423 Locked (WebDAV; RFC 4918) The resource that is being accessed is locked. 424 Failed Dependency (WebDAV; RFC 4918) The request failed due to failure of a previous request (e.g., a PROPPATCH). 426 Upgrade Required The client should switch to a different protocol such as TLS/1.0, given in the Upgrade header field. 428 Precondition Required (RFC 6585) The origin server requires the request to be conditional. Intended to prevent "the 'lost update' problem, where a client GETs a resource's state, modifies it, and PUTs it back to the server, when meanwhile a third party has modified the state on the server, leading to a conflict." 429 Too Many Requests (RFC 6585) The user has sent too many requests in a given amount of time. Intended for use with rate limiting schemes. 431 Request Header Fields Too Large (RFC 6585) The server is unwilling to process the request because either an individual header field, or all the header fields collectively, are too large. 451 Unavailable For Legal Reasons A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource. The code 451 was chosen as a reference to the novel Fahrenheit 451.
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HTTP status codes

HTTP状态码 List of HTTP status codes

List of HTTP status codes HTTP状态码