HTTP 203 Non-Authoritative Information vs 499 Client Closed Request
HTTP 203 (Non-Authoritative Information) is a 2xx Success response, while 499 (Client Closed Request) is a 4xx Client Error response. 203 indicates that the response payload has been modified by a transforming proxy from the origin server's 200 response. In contrast, 499 means that a non-standard status code used by Nginx when the client closes the connection before the server responds.
Descripción
The response payload has been modified by a transforming proxy from the origin server's 200 response.
Cuándo lo verás
When a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
Cómo solucionarlo
Check if a proxy is modifying the response. Access the origin directly if you need the original content.
Descripción
A non-standard status code used by Nginx when the client closes the connection before the server responds.
Cuándo lo verás
In Nginx logs when clients timeout or navigate away before receiving the response.
Cómo solucionarlo
Optimize server response times. Check for slow upstream services.
Diferencias clave
203 is a 2xx Success response, while 499 is a 4xx Client Error response.
HTTP 203: The response payload has been modified by a transforming proxy from the origin server's 200 response.
HTTP 499: A non-standard status code used by Nginx when the client closes the connection before the server responds.
You encounter 203 when when a proxy or CDN modifies the response body (e.g., adds headers, transforms content).
You encounter 499 when in Nginx logs when clients timeout or navigate away before receiving the response.
Cuándo usar cada uno
For 203 (Non-Authoritative Information): Check if a proxy is modifying the response. Access the origin directly if you need the original content. For 499 (Client Closed Request): Optimize server response times. Check for slow upstream services.