using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Net.Http;

using System.Threading;

using System.Threading.Tasks;

using System.Web.Http;

using System.Web.Http.Controllers;

namespace Common

{

    public class Cors : DelegatingHandler

    {

        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

        {

            HttpResponseMessage response = base.SendAsync(request, cancellationToken).Result;

            response.Headers.Add("Access-Control-Allow-Origin", "*");

            return Task.FromResult<HttpResponseMessage>(response);

        }

    }

}

GlobalConfiguration.Configuration.MessageHandlers.Add(new CorsHandler());