HTTP 417 Expectation Failed vs 508 Loop Detected
HTTP 417 (Expectation Failed) is a 4xx Client Error response, while 508 (Loop Detected) is a 5xx Server Error response. 417 indicates that the server cannot meet the requirements of the Expect header. In contrast, 508 means that the server detected an infinite loop while processing the request (WebDAV).
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.
Description
The server detected an infinite loop while processing the request (WebDAV).
When You See It
When WebDAV encounters circular references in bindings.
How to Fix
Fix the circular reference in the WebDAV configuration.
Key Differences
417 is a 4xx Client Error response, while 508 is a 5xx Server Error response.
HTTP 417: The server cannot meet the requirements of the Expect header.
HTTP 508: The server detected an infinite loop while processing the request (WebDAV).
You encounter 417 when when the server doesn't support Expect: 100-continue.
You encounter 508 when when WebDAV encounters circular references in bindings.
When to Use Which
For 417 (Expectation Failed): Remove the Expect header from your request. For 508 (Loop Detected): Fix the circular reference in the WebDAV configuration.