HTTP 200 OK vs 409 Conflict
HTTP 200 (OK) is a 2xx Success response, while 409 (Conflict) is a 4xx Client Error response. 200 indicates that the request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only. In contrast, 409 means that the request conflicts with the current state of the server. Often due to concurrent modification or business rule violations.
Description
The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
Quand vous le voyez
The most common HTTP response — indicates the request was processed successfully.
Comment résoudre
No fix needed. The request succeeded as expected.
Description
The request conflicts with the current state of the server. Often due to concurrent modification or business rule violations.
Quand vous le voyez
When trying to create a resource that already exists, or updating a resource that was modified by another request.
Comment résoudre
Refresh the resource state, resolve conflicts, and retry. Use ETags for optimistic concurrency.
Différences clés
200 is a 2xx Success response, while 409 is a 4xx Client Error response.
HTTP 200: The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
HTTP 409: The request conflicts with the current state of the server. Often due to concurrent modification or business rule violations.
You encounter 200 when the most common HTTP response — indicates the request was processed successfully.
You encounter 409 when when trying to create a resource that already exists, or updating a resource that was modified by another request.
Quand utiliser lequel
For 200 (OK): No fix needed. The request succeeded as expected. For 409 (Conflict): Refresh the resource state, resolve conflicts, and retry. Use ETags for optimistic concurrency.