HTTP 101 Switching Protocols vs 202 Accepted
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 202 (Accepted) is a 2xx Success response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 202 means that the request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
Description
The server understands the Upgrade header field request and indicates which protocol it is switching to.
Quand vous le voyez
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
Comment résoudre
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Description
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
Quand vous le voyez
For async operations like batch jobs, email sending, or background tasks that take time to complete.
Comment résoudre
Poll the provided status URL or wait for a callback/webhook.
Différences clés
101 is a 1xx Informational response, while 202 is a 2xx Success response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 202: The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 202 when for async operations like batch jobs, email sending, or background tasks that take time to complete.
Quand utiliser lequel
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 202 (Accepted): Poll the provided status URL or wait for a callback/webhook.