HTTP 204 No Content vs 499 Client Closed Request
HTTP 204 (No Content) is a 2xx Success response, while 499 (Client Closed Request) is a 4xx Client Error response. 204 indicates that the server successfully processed the request but is not returning any content. Common for DELETE operations and form submissions that don't need a response body. In contrast, 499 means that a non-standard status code used by Nginx when the client closes the connection before the server responds.
Description
The server successfully processed the request but is not returning any content. Common for DELETE operations and form submissions that don't need a response body.
Quand vous le voyez
After DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
Comment résoudre
No fix needed. The action was successful; there is simply no content to return.
Description
A non-standard status code used by Nginx when the client closes the connection before the server responds.
Quand vous le voyez
In Nginx logs when clients timeout or navigate away before receiving the response.
Comment résoudre
Optimize server response times. Check for slow upstream services.
Différences clés
204 is a 2xx Success response, while 499 is a 4xx Client Error response.
HTTP 204: The server successfully processed the request but is not returning any content. Common for DELETE operations and form submissions that don't need a response body.
HTTP 499: A non-standard status code used by Nginx when the client closes the connection before the server responds.
You encounter 204 when after DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
You encounter 499 when in Nginx logs when clients timeout or navigate away before receiving the response.
Quand utiliser lequel
For 204 (No Content): No fix needed. The action was successful; there is simply no content to return. For 499 (Client Closed Request): Optimize server response times. Check for slow upstream services.