Enable CORS for Web Api 2 and OWIN token authentication

Question

I have an ASP.NET MVC 5 webproject (localhost:81) that calls functions from my WebApi 2 project (localhost:82) using Knockoutjs, to make the communication between the two p

Answer 1

Follow below steps and you will have your API working:

1. Remove any code like config.EnableCors(), [EnableCors(header:"*"....)] from your API.

2. Go to startup.cs and add below line

   app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);
   

before

    ConfigureAuth(app);

Uou will also need to install Microsoft.owin.cors package to use this functionality