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.
Описание
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
Когда вы это видите
When a server wants the browser to start loading CSS/JS before the full response is ready.
Как исправить
No fix needed. This optimization helps speed up page loading.
Описание
The server cannot meet the requirements of the Expect header.
Когда вы это видите
When the server doesn't support Expect: 100-continue.
Как исправить
Remove the Expect header from your request.
Ключевые различия
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.
Когда что использовать
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.