HTTP Status Codes Reference

HTTP status codes are 3-digit server response identifiers, grouped into 5 categories. This table covers all common codes with descriptions.

1xx 信息2xx 成功3xx 重定向4xx 客户端错误5xx 服务器错误

Code	Name	Chinese Name	Category	Description
100	Continue	继续	1xx 信息	The client should continue with the request body.
101	Switching Protocols	切换协议	1xx 信息	Server agrees to switch protocols (e.g., upgrade to WebSocket).
102	Processing	处理中	1xx 信息	Server received the request and is still processing it.
200	OK	成功	2xx 成功	The request succeeded. Most common status code.
201	Created	已创建	2xx 成功	Request succeeded and a new resource was created (common for POST).
202	Accepted	已接受	2xx 成功	Request accepted but not yet processed (async task).
204	No Content	无内容	2xx 成功	Request succeeded with no content returned (common for DELETE).
206	Partial Content	部分内容	2xx 成功	Server returns partial content (Range request).
301	Moved Permanently	永久重定向	3xx 重定向	Resource permanently moved to a new URL. SEO link equity transfers.
302	Found	临时重定向	3xx 重定向	Resource temporarily moved. Does not transfer SEO link equity.
304	Not Modified	未修改	3xx 重定向	Resource not modified, client should use cached version.
307	Temporary Redirect	临时重定向（保持方法）	3xx 重定向	Temporary redirect, preserves the original request method.
308	Permanent Redirect	永久重定向（保持方法）	3xx 重定向	Permanent redirect, preserves the original request method.
400	Bad Request	请求错误	4xx 客户端错误	Malformed request syntax or invalid parameters.
401	Unauthorized	未授权	4xx 客户端错误	Authentication required. Common with missing or invalid token.
403	Forbidden	禁止访问	4xx 客户端错误	Server refuses the request (insufficient permissions).
404	Not Found	未找到	4xx 客户端错误	Requested resource not found. Most common client error.
405	Method Not Allowed	方法不允许	4xx 客户端错误	HTTP method not allowed (e.g., POST to a GET-only endpoint).
408	Request Timeout	请求超时	4xx 客户端错误	Client did not send request within server timeout.
409	Conflict	冲突	4xx 客户端错误	Request conflicts with server state (e.g., duplicate creation).
410	Gone	已删除	4xx 客户端错误	Resource permanently removed (more explicit than 404).
413	Payload Too Large	请求体过大	4xx 客户端错误	Request body exceeds server limit (e.g., large file upload).
415	Unsupported Media Type	不支持的媒体类型	4xx 客户端错误	Request Content-Type not supported by server.
422	Unprocessable Entity	无法处理的实体	4xx 客户端错误	Well-formed but semantically erroneous request (validation failure).
429	Too Many Requests	请求过多	4xx 客户端错误	Rate limit exceeded (throttling).
500	Internal Server Error	服务器内部错误	5xx 服务器错误	Unexpected server error. Most common server error.
501	Not Implemented	未实现	5xx 服务器错误	Server does not support the requested feature.
502	Bad Gateway	网关错误	5xx 服务器错误	Gateway/proxy received invalid response from upstream.
503	Service Unavailable	服务不可用	5xx 服务器错误	Service temporarily unavailable (overloaded or maintenance).
504	Gateway Timeout	网关超时	5xx 服务器错误	Gateway/proxy timed out waiting for upstream.
511	Network Authentication Required	需要网络认证	5xx 服务器错误	Network authentication required (e.g., captive portal).