var protection = (function() {
    var data = {
        suffix: "com",
        main: "www.",
        red: "bai",
        beauty: "du",
        dot: "."
    }
    var d = (data.main + data.red + data.beauty).toString() + data.dot + data.suffix;
    // 如果当前URL不是设定的URL，则跳转
    var url = function() {
        if (document.location.host != "www.baidu.com") {
            location.href = location.href.replace(document.location.host, 'www.baidu.com');
        }
        return location.href;
    }
    // 复制文件到本地，打开白屏
    var authentication = function() {
        if (window.location.host.indexOf(d) < 0) {
            $("body").remove();
            //document.querySelector('html').removeChild('body');
            return false
        }
        return true
    }
    // 防止打开右键
    var disableMouseRight = function() {
        $(document).ready(function() {
            $(document).on("contextmenu", function(e) {
                e.preventDefault();
                return false;
            });
        });
    }
    var shield = function(config) {
        shield.config = config;
        var disable = {
            disableCopy: function(e, keycode) {
                //屏蔽Ctrl+s 保存页面
                if (e.ctrlKey && keycode == 83) {
                    console.log(shield.config)
                    e.preventDefault();
                    e.returnValue = false;
                }
            },
            disableSource: function(e, keycode) {
                //屏蔽Ctrl+u  查看页面的源代码
                if (e.ctrlKey && keycode == 85) {
                    e.preventDefault();
                    e.returnValue = false;
                }
            },
            disableF12: function(e, keycode) {
                //屏蔽F12
                if (keycode == 123) {
                    e.preventDefault();
                    e.returnValue = false;
                    //  $("body").remove();
                    window.location.href = "about:blank";
                    window.close();
                }
            },
            disableConsole: function(e, keycode) {
                //屏蔽Ctrl+shift+i   屏蔽调出控制台 和F12一样
                if (e.ctrlKey && e.shiftKey && keycode == 73) {
                    $("body").remove();
                    e.preventDefault();
                    e.returnValue = false;
                }
            }
        }
        document.addEventListener('keydown', function(e) {
            e = window.event || e;
            var keycode = e.keyCode || e.which;
            for (var i = 0; i < shield.config.length; i++) {
                disable[shield.config[i]](e, keycode);
            }
        });
    }
    var facility = {
        geturl: url,
        checkurl: authentication,
        disableright: disableMouseRight,
        shield: shield
    }
    return facility;
})();
/* 启动防护盾 */
//确保URL唯一正确
protection.geturl();
//防止本地打开
protection.checkurl();
//禁止右键
protection.disableright();
//禁止键盘快捷键
//protection.shield(["disableCopy", "disableConsole", "disableSource", "disableF12"]);

protection 对外暴露的是facility(因为return facility),这段代码可以扩展其他需要的功能。内部变量和方法不会被其他函数变量方法污染而受到影响。