HTTP 101 Switching Protocols vs 504 Gateway Timeout
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 504 (Gateway Timeout) 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, 504 means that the server, acting as a gateway or proxy, did not receive a timely response from the upstream server.
描述
The server understands the Upgrade header field request and indicates which protocol it is switching to.
何时出现
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
如何修复
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
描述
The server, acting as a gateway or proxy, did not receive a timely response from the upstream server.
何时出现
When an upstream server is too slow to respond within the proxy's timeout window.
如何修复
Increase proxy timeout settings. Optimize upstream server performance. Check for long-running queries.
主要区别
101 is a 1xx Informational response, while 504 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 504: The server, acting as a gateway or proxy, did not receive a timely response from the upstream server.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 504 when when an upstream server is too slow to respond within the proxy's timeout window.
何时使用哪个
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 504 (Gateway Timeout): Increase proxy timeout settings. Optimize upstream server performance. Check for long-running queries.