Chrome extension JSONP request access global variable

Question

I'm using JSONP in a google chrome extension. In order to make it work, i had to add

chrome.extension.onRequest.addListener(onRequest);

and then make the request like this:

var jsonpURL;
$(document).ready(function(){
   /* i make the "someurl" here from a div's content */
   jsonpURL="someurl";
   chrome.extension.sendRequest({action:'getJSON',url:jsonpURL});
});

and the problem is, i cant acces the jsonpURL variable in the request:

function onRequest(request, sender, callback) {
    alert(jsonpURL);
}

Undefinied.

seems like the jsonpURL variable has no value at the request despite i start it only after i gave value to the jsonpURL variable in the ready function.

Answer 1

request.url应该与onRequest函数中的jsonpURL相等。