You need to implement something like this in your backend:
https://gist.github.com/1306507


On Wed, Jun 6, 2012 at 12:07 PM, Vikas Hazrati <vi...@knoldus.com> wrote:

> Hi,
>
> We have a scenario where we need to access our Scalatra based app deployed
> on heroku via local backbone.js application. The use case being that
> backbone development is loosely coupled to the server side through JSON
> interchange.
>
> The problem that we are running into is related to CORS. When we access
> the server from our local backbone app, we get the following error
>
> XMLHttpRequest cannot load http://myapp.herokuapp.com/user/authenticate.
> Origin null is not allowed by Access-Control-Allow-Origin.
>
> Is there a way to specify the header('Access-Control-Allow-Origin: *') for
> our app  in heroku?
>
> should we be doing it another way?
>
> Regards | Vikas
> www.knoldus.com
> blog.knoldus.com
>
>
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