Okay thank you for the overview of possibilities. I will investigate the 
CORS approach.

Am Montag, 22. Dezember 2014 19:07:07 UTC+1 schrieb Jens:
>
> You have to live with the JavaScript constraints which means you either 
> make a request to the domain the app is served from or the server must 
> support CORS headers to allow cross origin requests. If both are not 
> possible then JSONP is the only other solution to make requests to any 
> domain that supports JSONP. 
> If you don't like the JSONP approach then publish your own URL somewhere 
> in the internet and let it use CORS headers so you can make a request to 
> that URL.
>
> Alternatively if your app is wrapped with a native app frame (e.g. 
> UIWebView on iOS) then you might implement something natively in 
> Objective-C and call it through JavaScript.
>
> -- J.
>

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