HTTP 103 Early Hints vs 417 Expectation Failed
HTTP 103 (Early Hints) is a 1xx Informational response, while 417 (Expectation Failed) is a 4xx Client 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, 417 means that the server cannot meet the requirements of the Expect header.
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 cannot meet the requirements of the Expect header.
何时出现
When the server doesn't support Expect: 100-continue.
如何修复
Remove the Expect header from your request.
主要区别
103 is a 1xx Informational response, while 417 is a 4xx Client 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 417: The server cannot meet the requirements of the Expect header.
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 417 when when the server doesn't support Expect: 100-continue.
何时使用哪个
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 417 (Expectation Failed): Remove the Expect header from your request.