Response to preflight request doesn't pass access control check

Question

I\'m getting this error using ngResource to call a REST API on Amazon Web Services:

XMLHttpRequest cannot load http://server.apiurl.com:8000/s/login

Answer 1

Our team occasionally sees this using Vue, axios and a C# WebApi. Adding a route attribute on the endpoint you're trying to hit fixes it for us.

[Route("ControllerName/Endpoint")]
[HttpOptions, HttpPost]
public IHttpActionResult Endpoint() { }