HTTP 226 IM Used vs 510 Not Extended
HTTP 226 (IM Used) is a 2xx Success response, while 510 (Not Extended) is a 5xx Server Error response. 226 indicates that the server has fulfilled a GET request for the resource, and the response is a representation of the result of one or more instance-manipulations. In contrast, 510 means that further extensions to the request are required for the server to fulfill it.
Description
The server has fulfilled a GET request for the resource, and the response is a representation of the result of one or more instance-manipulations.
When You See It
When using delta encoding to reduce bandwidth.
How to Fix
Rarely encountered. The response uses Instance Manipulations (IM) as specified.
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
226 is a 2xx Success response, while 510 is a 5xx Server Error response.
HTTP 226: The server has fulfilled a GET request for the resource, and the response is a representation of the result of one or more instance-manipulations.
HTTP 510: Further extensions to the request are required for the server to fulfill it.
You encounter 226 when when using delta encoding to reduce bandwidth.
You encounter 510 when when an HTTP extension required by the server is not present in the request.
When to Use Which
For 226 (IM Used): Rarely encountered. The response uses Instance Manipulations (IM) as specified. For 510 (Not Extended): Add the required extension headers to your request.