HTTP 101 Switching Protocols vs 300 Multiple Choices
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 300 (Multiple Choices) is a 3xx Redirection response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 300 means that the request has more than one possible response. The client should choose one of them.
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 request has more than one possible response. The client should choose one of them.
このコードが表示される場合
When a resource is available in multiple formats (e.g., different languages or media types).
解決方法
Select the appropriate resource variant. Send an Accept header with your preferred content type.
主な違い
101 is a 1xx Informational response, while 300 is a 3xx Redirection response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 300: The request has more than one possible response. The client should choose one of them.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 300 when when a resource is available in multiple formats (e.g., different languages or media types).
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 300 (Multiple Choices): Select the appropriate resource variant. Send an Accept header with your preferred content type.