HTTP 202 Accepted vs 412 Precondition Failed
HTTP 202 (Accepted) is a 2xx Success response, while 412 (Precondition Failed) is a 4xx Client Error response. 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. In contrast, 412 means that one or more conditions in the request headers (If-Match, If-Unmodified-Since) evaluated to false.
Beschreibung
The request has been accepted for processing, but the processing has not been completed. The request might or might not eventually be acted upon.
Wann Sie es sehen
For async operations like batch jobs, email sending, or background tasks that take time to complete.
Wie man es behebt
Poll the provided status URL or wait for a callback/webhook.
Beschreibung
One or more conditions in the request headers (If-Match, If-Unmodified-Since) evaluated to false.
Wann Sie es sehen
When using conditional requests with ETags and the resource has changed.
Wie man es behebt
Refresh the ETag/Last-Modified value and retry with updated preconditions.
Wesentliche Unterschiede
202 is a 2xx Success response, while 412 is a 4xx Client Error response.
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 412: One or more conditions in the request headers (If-Match, If-Unmodified-Since) evaluated to false.
You encounter 202 when for async operations like batch jobs, email sending, or background tasks that take time to complete.
You encounter 412 when when using conditional requests with ETags and the resource has changed.
Wann welchen verwenden
For 202 (Accepted): Poll the provided status URL or wait for a callback/webhook. For 412 (Precondition Failed): Refresh the ETag/Last-Modified value and retry with updated preconditions.