javascript - 使用 javascript 创建和修改 xml 文件(想在客户端保存 xml 文件)

Question

如何使用 javascript 在客户端保存 xml 文件...？

        if (window.XMLHttpRequest) {
            xhttp = new XMLHttpRequest();
        }
        else // Internet Explorer 5/6
        {
            xhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        xhttp.open("GET", "User.xml", false);
        xhttp.send("");
        xmlDoc = xhttp.responseXML;

        xmlDoc.getElementsByTagName("Username")[0].childNodes[0].nodeValue = 'asdasf';
        xmlDoc.getElementsByTagName("password")[0].childNodes[0].nodeValue = 'asdAS';
        xmlDoc.getElementsByTagName("UserId")[0].childNodes[0].nodeValue = '12';
        xmlDoc.save("User.xml");

这不起作用..显示错误，因为保存不是函数。

谢谢 苏妮莎。

Answer 1

这在 JavaScript 中是不允许的。这将是一个安全漏洞。

阅读JavaScript security

JavaScript and the DOM provide the potential for malicious authors to deliver scripts to run on a client computer via the web. Browser authors contain this risk using two restrictions. First, scripts run in a sandbox in which they can only perform web-related actions, not general-purpose programming tasks like creating files. Second, scripts are constrained by the same origin policy: scripts from one web site do not have access to information such as usernames, passwords, or cookies sent to another site. Most JavaScript-related security bugs are breaches of either the same origin policy or the sandbox.