HTTP 201 Created vs 503 Service Unavailable
HTTP 201 (Created) is a 2xx Success response, while 503 (Service Unavailable) is a 5xx Server Error response. 201 indicates that the request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity. In contrast, 503 means that the server is temporarily unable to handle the request due to maintenance or overload. Should include a Retry-After header.
説明
The request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity.
このコードが表示される場合
After successfully creating a new user, post, order, or other resource via a REST API.
解決方法
No fix needed. Check the Location header for the URL of the new resource.
説明
The server is temporarily unable to handle the request due to maintenance or overload. Should include a Retry-After header.
このコードが表示される場合
During maintenance windows, server overload, or when the application pool is exhausted.
解決方法
Wait and retry. Check the Retry-After header. Scale up servers if it's a capacity issue.
主な違い
201 is a 2xx Success response, while 503 is a 5xx Server Error response.
HTTP 201: The request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity.
HTTP 503: The server is temporarily unable to handle the request due to maintenance or overload. Should include a Retry-After header.
You encounter 201 when after successfully creating a new user, post, order, or other resource via a REST API.
You encounter 503 when during maintenance windows, server overload, or when the application pool is exhausted.
どちらをいつ使うか
For 201 (Created): No fix needed. Check the Location header for the URL of the new resource. For 503 (Service Unavailable): Wait and retry. Check the Retry-After header. Scale up servers if it's a capacity issue.