Make sure OPTIONS requests to the REST API always return a success status code

[acelaya]

How Shlink is set-up

• Shlink Version: All
• PHP Version: All
• How do you serve Shlink: All
• Database engine used: All

Summary

Currently, when a CORS request is performed from the browser, and the browser performs a preflight (OPTIONS) request, that request returns the same status code that would return for the request with the regular request method.

That makes requests to invalid URLs return a non-successful status code on the preflight request, which in turn makes the browser not to perform the next request.

Current behavior

OPTIONS requests return non 2xx status codes in some circumstances.

Expected behavior

OPTIONS requests always return 2xx status codes, even if the next request is going to return an unsuccessful status code.

How to reproduce

Perform an OPTIONS request to a URL starting with /rest that would not match any URL if performed with any other request method.