HTTP 101 Switching Protocols vs 102 Processing
Both HTTP 101 (Switching Protocols) and 102 (Processing) belong to the 1xx Informational category. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. Meanwhile, 102 means that the server has received and is processing the request, but no response is available yet. Prevents the client from timing out.
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
The server has received and is processing the request, but no response is available yet. Prevents the client from timing out.
このコードが表示される場合
During long-running WebDAV operations.
解決方法
Wait for the final response. This is an interim status to prevent timeouts.
主な違い
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 102: The server has received and is processing the request, but no response is available yet. Prevents the client from timing out.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 102 when during long-running WebDAV operations.
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 102 (Processing): Wait for the final response. This is an interim status to prevent timeouts.