http状态码(http status code)（HTTP状态码（HTTP状态码））.doc

http状态码(http status code)（HTTP状态码（HTTP状态码）） The HTTP status code (HTTP, Status, Code) is the 3 bit numeric code used to represent the HTTP response state of the web server. It is defined by the RFC 2616 specification and obtains specifications such as RFC 2518, RFC 2817, RFC 2295, RFC 2774, and RFC 4918. The first number of all status codes represents one of the five states of the response. [Edit] 1XX messages This type of status code represents the request that has been accepted and needs to continue processing. This type of response is a temporary response that contains only the status line and some optional response header information, and ends with a blank line. Because any 1XX status code is not defined in the HTTP/1.0 protocol, the 1XX response is not allowed to such clients unless the server is under certain test conditions. [Edit] 100, Continue The client should continue to send requests. This temporary response is used to notify the client that some of its requests have been received by the server and have not yet been rejected. The client should continue to send the remainder of the request, or ignore the response if the request has been completed. The server must send a final response to the client after the request has been completed. [Edit] 101, Switching, Protocols The server has understood the clients request and will notify the client through the Upgrade headers to adopt a different protocol to complete the request. After sending the last empty line of this response, the server will switch to those protocols defined in the Upgrade headers. Similar measures should be taken only when new protocols are more profitable. For example, switching to the new HTTP version has an advantage over the older version, or switching to a real-time and synchronous protocol to deliver resources using such features. [Edit] 102, Processing The status code extended by WebDAV (RFC 2518) represents the process that will continue to be executed. [editor] 2XX success This type