npm install xss
通过标签白名单及属性白名单来过滤HTML标签,同时对包含特殊字符的属性值进行处理。默认配置可过滤大多数的XSS攻击代码,可根据实际应用场景来定制白名单及过滤方法。
var xss = require('xss');
// 使用默认的HTML白名单
console.log(xss('<script>alert("fff");</script>'));
// 修改默认的白名单
xss.whiteList.em = ['style']; //添加或更新一个 tag 到白名单
delete xss.whiteList.em; //从白名单删除一个 tag
// 指定HTML白名单
var whiteList = {
tag: ['attribute1', 'attribute2'] // 允许的属性
};
console.log(xss('<script>alert("fff");</script>', whiteList));
// 请参考默认的白名单:xss.whiteList
// 过滤指定属性的值,参考默认的 xss.onTagAttr
console.log(xss('<a href="javascript:ooxx">abc</a>', function (tag, attr, value) {
if (tag === 'a' && attr === 'href') {
if (value.substr(0, '11') === 'javascript:') {
return '#';
}
}
}));
-
使用默认配置: xss('要过滤的HTML代码');
-
使用自定义配置: xss('要过滤的HTML代码', 白名单, 过滤属性值函数); (可仅指定白名单或过滤属性值函数作为第二个参数)
白名单格式:
{
'小写标签名': ['允许出现的属性名(小写)']
}
过滤属性值函数格式:
/**
* @param {string} tag 标签名
* @param {string} attr 属性名
* @param {string} value 属性值
* @return {string} 若要修改此属性值,返回新属性值即可,否则不用返回值
function (tag, attr, value) {
// ...
}
单元测试:npm test
在线测试:运行目录中的cli.js,可在命令行中输入HTML代码,并看到过滤后的代码
解析速度为6.26MB/s,而另外一个validator模块的xss()函数速度仅为2.82MB/s。
测试代码参考benchmark目录
基于MIT协议发布:
Copyright (c) 2012 Lei Zongmin(雷宗民) <leizongmin@gmail.com>
http://ucdok.com
The MIT License
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permit persons to whom the Software is furnished to do so, subject to
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included in all copies or substantial portions of the Software.
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