HTTP 203 Non-Authoritative Information vs 502 Bad Gateway
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 502 (Bad Gateway) is a 5xx Server Error response. 203 indicates that the response payload has been modified by a transforming proxy from the origin server's 200 response. In contrast, 502 means that the server, acting as a gateway or proxy, received an invalid response from the upstream server.
説明
The response payload has been modified by a transforming proxy from the origin server's 200 response.
このコードが表示される場合
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
解決方法
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
説明
The server, acting as a gateway or proxy, received an invalid response from the upstream server.
このコードが表示される場合
When Nginx/Apache can't reach the application server (e.g., Gunicorn is down, upstream timeout).
解決方法
Check if the upstream server is running. Verify proxy configuration. Check for upstream timeouts.
主な違い
203 is a 2xx Success response, while 502 is a 5xx Server Error response.
HTTP 203: The response payload has been modified by a transforming proxy from the origin server's 200 response.
HTTP 502: The server, acting as a gateway or proxy, received an invalid response from the upstream server.
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 502 when when Nginx/Apache can't reach the application server (e.g., Gunicorn is down, upstream timeout).
どちらをいつ使うか
For 203 (Non-Authoritative Information): Check if a proxy is modifying the response. Access the origin directly if you need the original content. For 502 (Bad Gateway): Check if the upstream server is running. Verify proxy configuration. Check for upstream timeouts.