HTTP 101 Switching Protocols vs 406 Not Acceptable
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 406 (Not Acceptable) 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, 406 means that the server cannot produce a response matching the Accept headers sent by the client.
Описание
The server understands the Upgrade header field request and indicates which protocol it is switching to.
Когда вы это видите
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
Как исправить
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Описание
The server cannot produce a response matching the Accept headers sent by the client.
Когда вы это видите
When requesting a content type the server doesn't support (e.g., Accept: application/xml when only JSON is available).
Как исправить
Adjust the Accept header to a format the server supports.
Ключевые различия
101 is a 1xx Informational response, while 406 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 406: The server cannot produce a response matching the Accept headers sent by the client.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 406 when when requesting a content type the server doesn't support (e.g., Accept: application/xml when only JSON is available).
Когда что использовать
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 406 (Not Acceptable): Adjust the Accept header to a format the server supports.