HTTP 416 Range Not Satisfiable vs 510 Not Extended
HTTP 416 (Range Not Satisfiable) is a 4xx Client Error response, while 510 (Not Extended) is a 5xx Server Error response. 416 indicates that the server cannot serve the requested byte range. The Range header value is outside the resource's size. In contrast, 510 means that further extensions to the request are required for the server to fulfill it.
Description
The server cannot serve the requested byte range. The Range header value is outside the resource's size.
When You See It
When requesting a byte range beyond the file's actual size.
How to Fix
Check the Content-Range in the response for the actual file size and adjust your Range header.
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
416 is a 4xx Client Error response, while 510 is a 5xx Server Error response.
HTTP 416: The server cannot serve the requested byte range. The Range header value is outside the resource's size.
HTTP 510: Further extensions to the request are required for the server to fulfill it.
You encounter 416 when when requesting a byte range beyond the file's actual size.
You encounter 510 when when an HTTP extension required by the server is not present in the request.
When to Use Which
For 416 (Range Not Satisfiable): Check the Content-Range in the response for the actual file size and adjust your Range header. For 510 (Not Extended): Add the required extension headers to your request.