console.log('server-side failure with status code ' + response.status);
If you are trying to get data from a domain that is not your businness you have to use JSONP due to the same origin policy.
However, If you are developing an application on localhost that you will upload on the same domain you are trying to get data from, you don't need to use JSONP!
In this case you only need to open you application from file://.... intead of http://localhost/...
This will makes the trick and will allow you to get data from a different domain.
Hope this helps.
Sencha Inc Andrea Cammarata, Solutions Engineer
CEO at SIMACS