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.
Description
The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
When You See It
The most common HTTP response — indicates the request was processed successfully.
How to Fix
No fix needed. The request succeeded as expected.
Description
The server cannot meet the requirements of the Expect header.
When You See It
When the server doesn't support Expect: 100-continue.
How to Fix
Remove the Expect header from your request.
Key Differences
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.
When to Use Which
For 200 (OK): No fix needed. The request succeeded as expected. For 417 (Expectation Failed): Remove the Expect header from your request.