CORS Errors on Embedded for Customers Power BI Report

Hi taylorjboone,

Please review the following thread which has similar problem as yours, hope it can help you resolve the problem...

CORS issue with PowerBI API

CORS is a browser security feature that disallows cross site referencing. Hence there isn't any setting on the PowerBI part to get it fixed. We earlier worked with the REST APIs but faced CORS issue on almost every browser. Using the CORS plugin for Chrome fixed the issue. But can't expect every user to install the client side plugin.

As a work around, we took the WebAPI approach, wherein our client side script hit the WebAPI endpoint, communicated with the PowerBI service to return the report. To overcome the CORS issue this way, add a reference to System.Web.Cors in the WebConfig.cs file found under App_Start folder and add the line config.EnableCors();

In the Controller, decorate the method with EnableCors as shown below and that should resolve your problem:

namespace MyNameSpace.MyControllers
{
    public class MyAPIController : ApiController
    { 
       [HttpPOST]
       [EnableCors(origins: "*", headers: "*", methods: "*")]
       public string getData()
       {
          return "This Works !";
       }
    }
}

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Best Regards