WEB API OnAuthorization is Called Twice

Question

I'm developing web API solution for authorization, we decorated each controller action method with the `BasicHttpAuthorizeAttribute` class with inherits from AuthorizeAttribute. `public class BasicHttpAuthorizeAttribute : System.Web.Http.AuthorizeAttribute` For every request, I see OnAuthorization method is called twice. when I check the callstack, all the request is made by same thread/processId. I'm using UnityContainer. I registered by Custom Authorize in WebApiConfig.cs Please let me know the reason for calling twice.

Accepted Answer

If you register a filter in webapiconfig.cs it will run for every incoming request. If you decorate an action with a filter, it will run for that action. Since you registered the filter and decorated the action, it will run two times.

WEB API OnAuthorization is Called Twice

Solution

Problem