HTTP 103 Early Hints vs 501 Not Implemented
HTTP 103 (Early Hints) is a 1xx Informational response, while 501 (Not Implemented) is a 5xx Server Error response. 103 indicates that used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response. In contrast, 501 means that the server does not support the functionality required to fulfill the request. The server either does not recognize the request method or lacks the ability to fulfill it.
描述
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
何时出现
When a server wants the browser to start loading CSS/JS before the full response is ready.
如何修复
No fix needed. This optimization helps speed up page loading.
描述
The server does not support the functionality required to fulfill the request. The server either does not recognize the request method or lacks the ability to fulfill it.
何时出现
When using an HTTP method (like PATCH) that the server doesn't support.
如何修复
Use a different HTTP method that the server supports. Check server documentation.
主要区别
103 is a 1xx Informational response, while 501 is a 5xx Server Error response.
HTTP 103: Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
HTTP 501: The server does not support the functionality required to fulfill the request. The server either does not recognize the request method or lacks the ability to fulfill it.
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 501 when when using an HTTP method (like PATCH) that the server doesn't support.
何时使用哪个
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 501 (Not Implemented): Use a different HTTP method that the server supports. Check server documentation.