HTTP 302 Found vs 417 Expectation Failed
HTTP 302 (Found) is a 3xx Redirection response, while 417 (Expectation Failed) is a 4xx Client Error response. 302 indicates that the resource temporarily resides at a different URL. The client should continue using the original URL for future requests. In contrast, 417 means that the server cannot meet the requirements of the Expect header.
Description
The resource temporarily resides at a different URL. The client should continue using the original URL for future requests.
When You See It
During A/B testing, temporary maintenance pages, or geo-based redirects.
How to Fix
Follow the Location header. Note: browsers may change POST to GET on redirect.
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
302 is a 3xx Redirection response, while 417 is a 4xx Client Error response.
HTTP 302: The resource temporarily resides at a different URL. The client should continue using the original URL for future requests.
HTTP 417: The server cannot meet the requirements of the Expect header.
You encounter 302 when during A/B testing, temporary maintenance pages, or geo-based redirects.
You encounter 417 when when the server doesn't support Expect: 100-continue.
When to Use Which
For 302 (Found): Follow the Location header. Note: browsers may change POST to GET on redirect. For 417 (Expectation Failed): Remove the Expect header from your request.