HTTP 101 Switching Protocols vs 418 I'm a Teapot
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 418 (I'm a Teapot) is a 4xx Client Error response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 418 means that any attempt to brew coffee with a teapot should result in this error. An April Fools' joke from 1998 that became a beloved part of HTTP culture.
説明
The server understands the Upgrade header field request and indicates which protocol it is switching to.
このコードが表示される場合
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
解決方法
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
説明
Any attempt to brew coffee with a teapot should result in this error. An April Fools' joke from 1998 that became a beloved part of HTTP culture.
このコードが表示される場合
As an Easter egg on some websites, or when a server humorously refuses a request.
解決方法
Use a coffee pot instead of a teapot. Or just enjoy the joke.
主な違い
101 is a 1xx Informational response, while 418 is a 4xx Client Error response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 418: Any attempt to brew coffee with a teapot should result in this error. An April Fools' joke from 1998 that became a beloved part of HTTP culture.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 418 when as an Easter egg on some websites, or when a server humorously refuses a request.
どちらをいつ使うか
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 418 (I'm a Teapot): Use a coffee pot instead of a teapot. Or just enjoy the joke.