When a browser requests a service from a web server, an error might occur.
当浏览器向web服务器请求服务的时候可能会产生错误

This is a list of HTTP status messages that might be returned:
下面是所有这些错误所返回的HTTP状态消息列表

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1xx: 信息

消息:	描述:
100 Continue	Only a part of the request has been received by the server, but as long as it has not been rejected, the client should continue with the request 服务器只接受到部分请求，但并没有拒绝，客户应该继续请求
101 Switching Protocols	The server switches protocol 服务器交换机议定书

2xx: 成功

消息:	描述:
200 OK	The request is OK 请求成功
201 Created	The request is complete, and a new resource is created 请求完成，新资源被建立
202 Accepted	The request is accepted for processing, but the processing is not complete 进程接受请求，但整个进程尚未完毕
203 Non-authoritative Information
204 No Content
205 Reset Content
206 Partial Content

3xx: 重定向

消息:	描述:
300 Multiple Choices	A link list. The user can select a link and go to that location. Maximum five addresses 连接列表。用户可以通过选择一个连接到达指定的连接位置。最大允许输入5个地址。
301 Moved Permanently	The requested page has moved to a new url 请求页切换到一个新的URL地址
302 Found	The requested page has moved temporarily to a new url 请求页临时切换到一个新的URL地址
303 See Other	The requested page can be found under a different url 请求页可以在另一个URL地址中找到
304 Not Modified
305 Use Proxy
306 Unused	This code was used in a previous version. It is no longer used, but the code is reserved 该代码仅在先前版本中支持。当前版本已不再支持该代码，但是代码部分仍将保留
307 Temporary Redirect	The requested page has moved temporarily to a new url 请求页临时切换到一个新的URL地址

4xx: 客户端错误

消息:	描述:
400 Bad Request	The server did not understand the request 服务器不能读懂请求
401 Unauthorized	The requested page needs a username and a password 请求页面需要输入用户名和密码
402 Payment Required	You can not use this code yet 不允许在使用这段代码
403 Forbidden	Access is forbidden to the requested page 禁止访问请求页面
404 Not Found	The server can not find the requested page 服务器不能找到请求页面
405 Method Not Allowed	The method specified in the request is not allowed 不允许该请求
406 Not Acceptable	The server can only generate a response that is not accepted by the client 客户端不能接受来自于服务器的回应
407 Proxy Authentication Required	You must authenticate with a proxy server before this request can be served 不许在该请求被处理之前确定是否使用了代理服务器
408 Request Timeout	The request took longer than the server was prepared to wait 请求超时
409 Conflict	The request could not be completed because of a conflict 请求发生冲突
410 Gone	The requested page is no longer available 请求页已失效
411 Length Required	The "Content-Length" is not defined. The server will not accept the request without it 用于"Content-Length"未定义导致服务器不能接受该请求
412 Precondition Failed	The precondition given in the request evaluated to false by the server 请求中的预处理过程失败
413 Request Entity Too Large	The server will not accept the request, because the request entity is too large 由于请求实体过大导致服务器不接受该请求
414 Request-url Too Long	The server will not accept the request, because the url is too long. Occurs when you convert a "post" request to a "get" request with a long query information 服务器不接受该请求，因为URL过长。当你通过一条较长的查询信息将“post”请求转换为“get”请求时，将会发生该错误
415 Unsupported Media Type	The server will not accept the request, because the media type is not supported 服务器不接受该请求，主要是因为使用的媒体类型不支持
416
417 Expectation Failed

5xx: 服务器端错误

消息:	描述:
500 Internal Server Error	The request was not completed. The server met an unexpected condition 请求未能完成。服务器遭遇意外情况
501 Not Implemented	The request was not completed. The server did not support the functionality required 请求未能完成。服务器不支持该指定的功能
502 Bad Gateway	The request was not completed. The server received an invalid response from the upstream server 请求未能完成。服务器从上游服务器中提取了无效回应
503 Service Unavailable	The request was not completed. The server is temporarily overloading or down 请求未能完成。服务器承载量超负荷
504 Gateway Timeout	The gateway has timed out 网关超时
505 HTTP Version Not Supported	The server does not support the "http protocol" version 服务器不支持该“http protocal[http协议]”版本

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