码农教程 - 一技在手,衣食无忧! tools

HTTP 消息

❮ 上一节 下一节 ❯

HTML 错误消息

当浏览器向网络服务器请求服务时，可能会发生错误，服务器可能会返回类似 "404 Not Found" 的错误代码。

通常将这些错误命名为 HTML 错误消息。

但这些消息称为 HTTP 状态消息。事实上，服务器总是为每个请求返回一条消息。最常见的消息是 200 OK。

以下是可能返回的 HTTP 状态消息的列表：

1xx：信息

Message: Description:
100 Continue The server has received the request headers, and the client should proceed to send the request body
101 Switching Protocols The requester has asked the server to switch protocols
103 Early Hints Used with the Link header to allow the browser to start preloading resources while the server prepares a response

2xx：成功

Message: Description:
200 OK The request is OK (this is the standard response for successful HTTP requests)
201 Created The request has been fulfilled, and a new resource is created 
202 Accepted The request has been accepted for processing, but the processing has not been completed
203 Non-Authoritative Information The request has been successfully processed, but is returning information that may be from another source
204 No Content The request has been successfully processed, but is not returning any content
205 Reset Content The request has been successfully processed, but is not returning any content, and requires that the requester reset the document view
206 Partial Content The server is delivering only part of the resource due to a range header sent by the client

3xx：重定向

Message: Description:
300 Multiple Choices A link list. The user can select a link and go to that location. Maximum five addresses  
301 Moved Permanently The requested page has moved to a new URL 
302 Found The requested page has moved temporarily to a new URL 
303 See Other The requested page can be found under a different URL
304 Not Modified Indicates the requested page has not been modified since last requested
307 Temporary Redirect The requested page has moved temporarily to a new URL
308 Permanent Redirect The requested page has moved permanently to a new URL

4xx：客户端错误

Message: Description:
400 Bad Request The request cannot be fulfilled due to bad syntax
401 Unauthorized The request was a legal request, but the server is refusing to respond to it. For use when authentication is possible but has failed or not yet been provided
402 Payment Required Reserved for future use
403 Forbidden The request was a legal request, but the server is refusing to respond to it
404 Not Found The requested page could not be found but may be available again in the future
405 Method Not Allowed A request was made of a page using a request method not supported by that page
406 Not Acceptable The server can only generate a response that is not accepted by the client
407 Proxy Authentication Required The client must first authenticate itself with the proxy
408 Request Timeout The server timed out waiting for the request
409 Conflict The request could not be completed because of a conflict in the request
410 Gone The requested page is no longer available
411 Length Required The "Content-Length" is not defined. The server will not accept the request without it 
412 Precondition Failed The precondition given in the request evaluated to false by the server
413 Request Too Large The server will not accept the request, because the request entity is too large
414 Request-URI Too Long The server will not accept the request, because the URI is too long. Occurs when you convert a POST request to a GET request with a long query information 
415 Unsupported Media Type The server will not accept the request, because the media type is not supported 
416 Range Not Satisfiable The client has asked for a portion of the file, but the server cannot supply that portion
417 Expectation Failed The server cannot meet the requirements of the Expect request-header field

5xx：服务器错误

Message: Description:
500 Internal Server Error A generic error message, given when no more specific message is suitable
501 Not Implemented The server either does not recognize the request method, or it lacks the ability to fulfill the request
502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server
503 Service Unavailable The server is currently unavailable (overloaded or down)
504 Gateway Timeout The server was acting as a gateway or proxy and did not receive a timely response from the upstream server
505 HTTP Version Not Supported The server does not support the HTTP protocol version used in the request
511 Network Authentication Required The client needs to authenticate to gain network access

❮ 上一节 下一节 ❯