I define a jsonp proxy to read data out of iTunes, the url is
http://itunes.apple.com/search?entity=album&term=... (... is the search string)
It works for a given search string.
How can I set the url dynamically. I tried to use the beforeload event with store.setProxy, but I do not manage to replace the url in the network call.
Is there an automatic way of passing parameters to the store/proxy so that the proxy handles the url extension?