public String scriptUpload(String appKey, String userKey, String testId, String fileName) {
        try {
            appKey = URLEncoder.encode(appKey, "UTF-8");
            userKey = URLEncoder.encode(userKey, "UTF-8");
            testId = URLEncoder.encode(testId, "UTF-8");
            fileName = URLEncoder.encode(fileName, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            BmLog.error(e);
        }
        return String.format("%s/api/rest/blazemeter/testScriptUpload/?app_key=%s&user_key=%s&test_id=%s&file_name=%s", SERVER_URL, appKey, userKey, testId, fileName);
    }