HTTP 101 Switching Protocols vs 505 HTTP Version Not Supported
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 505 (HTTP Version Not Supported) is a 5xx Server Error response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 505 means that the server does not support the HTTP version used in the request.
Descrição
The server understands the Upgrade header field request and indicates which protocol it is switching to.
Quando você o vê
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
Como corrigir
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Descrição
The server does not support the HTTP version used in the request.
Quando você o vê
When a client uses an HTTP version the server doesn't support.
Como corrigir
Use a supported HTTP version (typically HTTP/1.1 or HTTP/2).
Diferenças principais
101 is a 1xx Informational response, while 505 is a 5xx Server Error response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 505: The server does not support the HTTP version used in the request.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 505 when when a client uses an HTTP version the server doesn't support.
Quando usar qual
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 505 (HTTP Version Not Supported): Use a supported HTTP version (typically HTTP/1.1 or HTTP/2).