getPagesSource.js

var getData = function () {
    try {
        var innerText = document.body.innerText;
        //figure out if callback was specified and needs to be parsed from the response.
        var callback = RegExp(/\?.*callback=(.*)/).exec(document.URL);
        //figure out the callback name.
        //console.log(callback);
        if (callback) {
            callback = callback[1];
            //determine if there is other params in the response to ignore
            if (callback.indexOf('&') != -1) {
                var loc1 = callback.indexOf('&');
                //console.log(loc1);
                callback = callback.substring(0, loc1);
            }
            if (callback != '') {
                innerText = innerText.replace(callback + '(', '');
                innerText = innerText.substring(0, innerText.length - 2);
            }
        }
        //console.log(innerText);
        var obj = JSON.parse(innerText);
        return obj;
    }
    catch (ex) {
        throw ex;
        return false;
    }
}

function getJsonFromUrl() {
    var query = location.search.substr(1);
    var data = query.split("&");
    var result = {};
    for (var i = 0; i < data.length; i++) {
        var item = data[i].split("=");
        if(item[0]!='callback')
            result[item[0]] = decodeURIComponent(item[1]);
    }
    return result;
}

function isJsonP() {
    var callback = RegExp(/\?.*callback=(.*)/).exec(document.URL);
    //figure out the callback name.
    if (callback) {
        callback = callback[1];
        //determine if there is other params in the response to ignore
        if (callback.indexOf('&') != -1) {
            var loc1 = callback.indexOf('&');
            //console.log(loc1);
            callback = callback.substring(0, loc1);
        }
    }

    if (callback == null || callback == '')
        return false;
    else
        return true;
}

chrome.extension.sendMessage({
    action: "getSource",
    source: getData(),
    extraParams: getJsonFromUrl(),
    isJsonP: isJsonP(),
    url:location.href.replace(location.search,'')
});