HTTP 101 Switching Protocols vs 426 Upgrade Required
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 426 (Upgrade Required) 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, 426 means that the server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
Deskripsi
The server understands the Upgrade header field request and indicates which protocol it is switching to.
Ketika Anda Melihatnya
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
Cara Memperbaiki
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Deskripsi
The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
Ketika Anda Melihatnya
When a server requires HTTPS or a newer protocol version.
Cara Memperbaiki
Switch to the protocol specified in the Upgrade response header.
Perbedaan Utama
101 is a 1xx Informational response, while 426 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 426: The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 426 when when a server requires HTTPS or a newer protocol version.
Kapan Menggunakan Yang Mana
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 426 (Upgrade Required): Switch to the protocol specified in the Upgrade response header.