draft

worker-xhr.js

    /**
     * Дергает счетчик
     *
     * @param {String} url - Урл счетчика (без протокола!)
     */
    makeReq: function(url) {
        var createWorker = function(fn){
            var workerFunctionBlob = new Blob(['('+fn.toString()+')()'], { type: "text/javascript" });
            var worker = new Worker(URL.createObjectURL(workerFunctionBlob));
            URL.revokeObjectURL(workerFunctionBlob); // free fake blob url
            return worker;
        };

        var workerFunction = function() {
            onmessage = function(e) {
                postMessage(location.origin.split(':')[0] + ':' + e.data);
                var xhr = new XMLHttpRequest();
                xhr.responseType = 'text';
                xhr.open('GET', location.origin.split(':')[0] + ':' + e.data, false);
                xhr.send();
                postMessage('ok'+xhr.responseText);
                close();
            };
        };

        var worker = createWorker(workerFunction);

        worker.onmessage = function(e) {
            console.log("Received: " + e.data);
        };

        worker.postMessage(url); // Start the worker
    },