Web.config snippet to allow CORS

<?xml version="1.0" encoding="UTF-8"?>  
<configuration>  
    <system.webServer>
        <httpProtocol>
            <customHeaders>
                <add name="Access-Control-Allow-Origin" value="*" />
                <add name="Access-Control-Allow-Headers" value="Content-Type" />
                <add name="Access-Control-Allow-Methods" value="POST,GET,OPTIONS" />
            </customHeaders>
        </httpProtocol>
    </system.webServer>
</configuration>