public static String makeUrl(String url) {
        if (StringUtils.isBlank(url)) {
            return url;
        }
        String result = StringUtils.removeEnd(url, "/");
        if (!result.startsWith("http://") && !result.startsWith("https://")) {
            result = StringUtils.removeStart(result, "/");
            result = "http://" + result;
        }
        return result;
    }