HTTP 200 OK vs 417 Expectation Failed
HTTP 200 (OK) is a 2xx Success response, while 417 (Expectation Failed) 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, 417 means that the server cannot meet the requirements of the Expect header.
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 cannot meet the requirements of the Expect header.
このコードが表示される場合
When the server doesn't support Expect: 100-continue.
解決方法
Remove the Expect header from your request.
主な違い
200 is a 2xx Success response, while 417 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 417: The server cannot meet the requirements of the Expect header.
You encounter 200 when the most common HTTP response — indicates the request was processed successfully.
You encounter 417 when when the server doesn't support Expect: 100-continue.
どちらをいつ使うか
For 200 (OK): No fix needed. The request succeeded as expected. For 417 (Expectation Failed): Remove the Expect header from your request.