Question

我正在我的网页上运行第三方javascripts ，他们在未经我同意的情况下抓取href网址。有没有办法阻止它并避免它们访问它而不用iframe调用它们？

也许我可以重新定义window.location.href值，以便他们无法访问它，因为它在网址中？

感谢您的帮助！

Answer 1

location.href属性是只读的。我只能使用此stackoverflow帖子中概述的greasemonkey脚本的修改版本来部分解决此问题：Stop execution of Javascript function (client side) or tweak it

在下面的脚本中，调用函数displayUrl（），它将document.location.href警告到屏幕。 greasemonkey脚本使用Document.onbeforescriptexecute事件在javascript被执行之前拦截它，并用另一个字符串替换document.location.href。

只有firefox支持

onbeforescriptexecute并且是非标准的：https://developer.mozilla.org/en-US/docs/Web/API/Document/onbeforescriptexecute

所以这不是一个理想的解决方案，但这个例子可能会给你一些想法。

<html>
<head>
</head>
<body>
<script>

function checkForBadJavascripts (controlArray) {

    /*--- Note that this is a self-initializing function.  The controlArray
        parameter is only active for the FIRST call.  After that, it is an
        event listener.

        The control array row is  defines like so:
        [bSearchSrcAttr, identifyingRegex, callbackFunction]
        Where:
            bSearchSrcAttr      True to search the SRC attribute of a script tag
                                false to search the TEXT content of a script tag.
            identifyingRegex    A valid regular expression that should be unique
                                to that particular script tag.
            callbackFunction    An optional function to execute when the script is
                                found.  Use null if not needed.
    */
    if ( ! controlArray.length) return null;

    checkForBadJavascripts      = function (zEvent) {

        for (var J = controlArray.length - 1;  J >= 0;  --J) {
            var bSearchSrcAttr      = controlArray[J][0];
            var identifyingRegex    = controlArray[J][1];

            if (bSearchSrcAttr) {

                if (identifyingRegex.test (zEvent.target.src) ) {
                    stopBadJavascript (J);
                    return false;
                }
            }
            else {
                if (identifyingRegex.test (zEvent.target.textContent) ) {
                    stopBadJavascript (J);
                    return false;
                }
            }
        }

        function stopBadJavascript (controlIndex) {
            zEvent.stopPropagation ();
            zEvent.preventDefault ();

            var callbackFunction    = controlArray[J][2];
            //if (typeof callbackFunction == "function") {
                //callbackFunction ();

                if (bSearchSrcAttr) {
                    var jsScript = zEvent.target.src;
                } else {
                    var jsScript = zEvent.target.textContent;
                }

                jsScript = jsScript.replace("document.location.href", "'http://example.com'");
                eval(jsScript);
            //}

            //--- Remove the node just to clear clutter from Firebug inspection.
            zEvent.target.parentNode.removeChild (zEvent.target);

            //--- Script is intercepted, remove it from the list.
            controlArray.splice (J, 1);
            if ( ! controlArray.length) {
                //--- All done, remove the listener.
                window.removeEventListener (
                    'beforescriptexecute', checkForBadJavascripts, true
                );
            }
        }
    }

    /*--- Use the "beforescriptexecute" event to monitor scipts as they are loaded.
        See https://developer.mozilla.org/en/DOM/element.onbeforescriptexecute
        Note that it does not work on acripts that are dynamically created.
    */
    window.addEventListener ('beforescriptexecute', checkForBadJavascripts, true);

    return checkForBadJavascripts;
}

function addJS_Node (text, s_URL, funcToRun) {
    var D                                   = document;
    var scriptNode                          = D.createElement ('script');
    scriptNode.type                         = "text/javascript";
    if (text)       scriptNode.textContent  = text;
    if (s_URL)      scriptNode.src          = s_URL;
    if (funcToRun)  scriptNode.textContent  = '(' + funcToRun.toString() + ')()';

    var targ = D.getElementsByTagName ('head')[0] || D.body || D.documentElement;
    //--- Don't error check here. if DOM not available, should throw error.
    targ.appendChild (scriptNode);
}

/*--- Check for bad scripts to intercept and specify any actions to take.
*/
checkForBadJavascripts ( [
    [   false, 
        /document.location.href/, 
        function () {
            addJS_Node (replaceScript);
        } 
    ]
] );

</script>

<script>
function displayUrl()
{
    var pageUrl = document.location.href;

    alert(pageUrl);
}

displayUrl();
</script>
</body>
</html>

注意：我已将以下代码添加到原始的greasemonkey脚本中：

    //if (typeof callbackFunction == "function") {
        //callbackFunction ();

        if (bSearchSrcAttr) {
            var jsScript = zEvent.target.src;
        } else {
            var jsScript = zEvent.target.textContent;
        }

        jsScript = jsScript.replace("document.location.href", "'http://example.com'");
        eval(jsScript);
    //}

阻止访问任何第三方javascript代码的href url

1 个答案: