HTTP 103 Early Hints vs 426 Upgrade Required
HTTP 103 (Early Hints) is a 1xx Informational response, while 426 (Upgrade Required) 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, 426 means that the server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
説明
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
このコードが表示される場合
When a server wants the browser to start loading CSS/JS before the full response is ready.
解決方法
No fix needed. This optimization helps speed up page loading.
説明
The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
このコードが表示される場合
When a server requires HTTPS or a newer protocol version.
解決方法
Switch to the protocol specified in the Upgrade response header.
主な違い
103 is a 1xx Informational response, while 426 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 426: The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 426 when when a server requires HTTPS or a newer protocol version.
どちらをいつ使うか
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 426 (Upgrade Required): Switch to the protocol specified in the Upgrade response header.