HTTP 200 OK vs 501 Not Implemented
HTTP 200 (OK) is a 2xx Success response, while 501 (Not Implemented) is a 5xx Server 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, 501 means that the server does not support the functionality required to fulfill the request. The server either does not recognize the request method or lacks the ability to fulfill it.
説明
The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
このコードが表示される場合
The most common HTTP response — indicates the request was processed successfully.
解決方法
No fix needed. The request succeeded as expected.
説明
The server does not support the functionality required to fulfill the request. The server either does not recognize the request method or lacks the ability to fulfill it.
このコードが表示される場合
When using an HTTP method (like PATCH) that the server doesn't support.
解決方法
Use a different HTTP method that the server supports. Check server documentation.
主な違い
200 is a 2xx Success response, while 501 is a 5xx Server 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 501: The server does not support the functionality required to fulfill the request. The server either does not recognize the request method or lacks the ability to fulfill it.
You encounter 200 when the most common HTTP response — indicates the request was processed successfully.
You encounter 501 when when using an HTTP method (like PATCH) that the server doesn't support.
どちらをいつ使うか
For 200 (OK): No fix needed. The request succeeded as expected. For 501 (Not Implemented): Use a different HTTP method that the server supports. Check server documentation.