HTTP 101 Switching Protocols vs 522 Connection Timed Out
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 522 (Connection Timed Out) 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, 522 means that cloudflare-specific. TCP connection to the origin server timed out.
설명
The server understands the Upgrade header field request and indicates which protocol it is switching to.
이 코드를 보게 되는 경우
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
해결 방법
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
설명
Cloudflare-specific. TCP connection to the origin server timed out.
이 코드를 보게 되는 경우
When the origin server is overloaded or network issues prevent connection.
해결 방법
Check origin server health. Verify firewall rules. Check for network congestion.
주요 차이점
101 is a 1xx Informational response, while 522 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 522: Cloudflare-specific. TCP connection to the origin server timed out.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 522 when when the origin server is overloaded or network issues prevent connection.
언제 어떤 것을 사용할지
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 522 (Connection Timed Out): Check origin server health. Verify firewall rules. Check for network congestion.