CORS POST Requests not working - OPTIONS (Bad Request) - The origin is not allowed

Question

I\'m having a lot of trouble getting a cross domain POST request to hit an Api controller in the latest beta 2 release.

Chrome (and other browsers) spit out:

Answer 1

if you use OAuth Authorization . request not go direct to web api. You need to enable OWIN CORS support for that endpoint.

How i do on my site: Install owin cors

Install-Package Microsoft.Owin.Cors

Note: please not use : Install-Package Microsoft.AspNet.WebApi.Cors

In file Startup.Auth.cs

 //add this line
            app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);

            // Enable the application to use bearer tokens to authenticate users
            app.UseOAuthBearerTokens(OAuthOptions);