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.
Описание
The response payload has been modified by a transforming proxy from the origin server's 200 response.
Когда вы это видите
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
Как исправить
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
Описание
The server, acting as a gateway or proxy, received an invalid response from the upstream server.
Когда вы это видите
When Nginx/Apache can't reach the application server (e.g., Gunicorn is down, upstream timeout).
Как исправить
Check if the upstream server is running. Verify proxy configuration. Check for upstream timeouts.
Ключевые различия
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).
Когда что использовать
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.