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.
Mô tả
The server understands the Upgrade header field request and indicates which protocol it is switching to.
Khi bạn thấy mã này
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
Cách khắc phục
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Mô tả
The server, acting as a gateway or proxy, did not receive a timely response from the upstream server.
Khi bạn thấy mã này
When an upstream server is too slow to respond within the proxy's timeout window.
Cách khắc phục
Increase proxy timeout settings. Optimize upstream server performance. Check for long-running queries.
Sự khác biệt chính
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.
Khi nào dùng cái nào
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.