HTTP 204 No Content vs 510 Not Extended
HTTP 204 (No Content) is a 2xx Success response, while 510 (Not Extended) is a 5xx Server 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, 510 means that further extensions to the request are required for the server to fulfill it.
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.
When You See It
After DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
How to Fix
No fix needed. The action was successful; there is simply no content to return.
Description
Further extensions to the request are required for the server to fulfill it.
When You See It
When an HTTP extension required by the server is not present in the request.
How to Fix
Add the required extension headers to your request.
Key Differences
204 is a 2xx Success response, while 510 is a 5xx Server 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 510: Further extensions to the request are required for the server to fulfill it.
You encounter 204 when after DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
You encounter 510 when when an HTTP extension required by the server is not present in the request.
When to Use Which
For 204 (No Content): No fix needed. The action was successful; there is simply no content to return. For 510 (Not Extended): Add the required extension headers to your request.