HTTP 405 Method Not Allowed vs 499 Client Closed Request
Both HTTP 405 (Method Not Allowed) and 499 (Client Closed Request) belong to the 4xx Client Error category. 405 indicates that the HTTP method is not allowed for the requested resource. The response includes an Allow header listing valid methods. Meanwhile, 499 means that a non-standard status code used by Nginx when the client closes the connection before the server responds.
Description
The HTTP method is not allowed for the requested resource. The response includes an Allow header listing valid methods.
When You See It
When sending POST to a read-only endpoint, or DELETE to a non-deletable resource.
How to Fix
Check the Allow response header for supported methods. Use the correct HTTP method.
Description
A non-standard status code used by Nginx when the client closes the connection before the server responds.
When You See It
In Nginx logs when clients timeout or navigate away before receiving the response.
How to Fix
Optimize server response times. Check for slow upstream services.
Key Differences
HTTP 405: The HTTP method is not allowed for the requested resource. The response includes an Allow header listing valid methods.
HTTP 499: A non-standard status code used by Nginx when the client closes the connection before the server responds.
You encounter 405 when when sending POST to a read-only endpoint, or DELETE to a non-deletable resource.
You encounter 499 when in Nginx logs when clients timeout or navigate away before receiving the response.
When to Use Which
For 405 (Method Not Allowed): Check the Allow response header for supported methods. Use the correct HTTP method. For 499 (Client Closed Request): Optimize server response times. Check for slow upstream services.