HTTP 202 Accepted vs 226 IM Used
Both HTTP 202 (Accepted) and 226 (IM Used) belong to the 2xx Success category. 202 indicates that the request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon. Meanwhile, 226 means 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.
Description
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
When You See It
For async operations like batch jobs, email sending, or background tasks that take time to complete.
How to Fix
Poll the provided status URL or wait for a callback/webhook.
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.
Key Differences
HTTP 202: The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
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.
You encounter 202 when for async operations like batch jobs, email sending, or background tasks that take time to complete.
You encounter 226 when when using delta encoding to reduce bandwidth.
When to Use Which
For 202 (Accepted): Poll the provided status URL or wait for a callback/webhook. For 226 (IM Used): Rarely encountered. The response uses Instance Manipulations (IM) as specified.