HTTP 101 Switching Protocols vs 408 Request Timeout
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 408 (Request Timeout) 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, 408 means that the server timed out waiting for the request. The client did not produce a request within the time the server was prepared to wait.
Description
The server understands the Upgrade header field request and indicates which protocol it is switching to.
When You See It
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
How to Fix
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Description
The server timed out waiting for the request. The client did not produce a request within the time the server was prepared to wait.
When You See It
When a client takes too long to send the complete request (slow upload, network issues).
How to Fix
Retry the request. Check your network connection. Reduce request payload size.
Key Differences
101 is a 1xx Informational response, while 408 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 408: The server timed out waiting for the request. The client did not produce a request within the time the server was prepared to wait.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 408 when when a client takes too long to send the complete request (slow upload, network issues).
When to Use Which
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 408 (Request Timeout): Retry the request. Check your network connection. Reduce request payload size.