Merge pull request #13 from xingrz/translation-english
English translation of README
This commit is contained in:
245
README.md
245
README.md
@@ -2,34 +2,39 @@
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[](http://travis-ci.org/leizongmin/js-xss)
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[](https://david-dm.org/leizongmin/js-xss)
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根据白名单过滤HTML(防止XSS攻击)
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Sanitize untrusted HTML (to prevent XSS) with a configuration specified by a Whitelist.
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======
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--------------
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**注意:0.1.x版本与0.0.x版本在自定义配置(除白名单配置外)格式上有较大改动,如果
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要使用新版本,请详细阅读下文的使用说明**
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**NOTE: The format of custom configuration (except Whitelist) from version
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0.0.X was changed a lot since version 0.1.X. To use a newer version, it's
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suggested to read the following guidelines carefully.**
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`xss` is a module used to filter input from users to prevent XSS attacks.
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([What is XSS attack?](http://en.wikipedia.org/wiki/Cross-site_scripting))
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`xss`是一个用于对用户输入的内容进行过滤,以避免遭受XSS攻击的模块
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([什么是XSS攻击?](http://baike.baidu.com/view/2161269.htm))。只要用于论坛、博客、网上商店等等一些可允许用户录入页面排版、
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格式控制相关的HTML的场景,`xss`模块通过白名单来控制允许的标签及相关的标签属性,
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另外还提供了一系列的接口以便用户扩展,比其他同类模块更为灵活。
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This module is needed for situations that allows users to input HTML for
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typesetting or formatting, including fourms, blogs, e-shops, etc.
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**项目主页:** https://github.com/leizongmin/js-xss
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The `xss` module controls the usage of tags and their attributes, according to
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the whitelist. It is also extendable with a series of APIs privided, which make
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it become more flexible, compares with other modules.
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**Project Homepage:** https://github.com/leizongmin/js-xss
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---------------
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## 特性
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## Features
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+ 白名单控制允许的HTML标签及各标签的属性
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+ 通过自定义处理函数,可对任意标签及其属性进行处理
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+ Specifies HTML tags and their attributes allowed with whitelist
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+ Handle any tags or attributes using custom function.
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## 参考资料
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## Reference
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+ [XSS与字符编码的那些事儿 ---科普文](http://drops.wooyun.org/tips/689)
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+ [腾讯实例教程:那些年我们一起学XSS](http://www.wooyun.org/whitehats/%E5%BF%83%E4%BC%A4%E7%9A%84%E7%98%A6%E5%AD%90)
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@@ -38,35 +43,36 @@
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+ [XSS with Data URI Scheme](http://hi.baidu.com/badzzzz/item/bdbafe83144619c199255f7b)
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## 性能(仅作参考)
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## Benchmark (for references only)
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+ xss模块:8.2 MB/s
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+ validator@0.3.7模块的xss()函数:4.4 MB/s
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+ the xss module: 8.2 MB/s
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+ `xss()` function from module `validator@0.3.7`: 4.4 MB/s
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测试代码参考 benchmark 目录
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For test code please refer to `benchmark` directory.
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## 单元测试
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## Unit Test
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在源码目录执行命令: `npm test`
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Run `npm test` command in the source directary.
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## 在线测试
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## Active Test
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在源码目录执行命令: `node lib/cli.js` ,可在命令行中输入HTML代码,并看到过滤后的代码
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Run `node lib/cli.js` command in the source directary, them you can type HTML
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code in the command-line, and check the filtered output.
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## 使用方法
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## Usages
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### 在Node.js中使用
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### In Node.js
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安装:
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To install:
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```bash
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$ npm install xss
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```
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简单使用方法:
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Simple usage:
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```JavaScript
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var xss = require('xss');
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@@ -74,123 +80,125 @@ var html = xss('<script>alert("xss");</script>');
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console.log(html);
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```
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### 在浏览器端使用
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### In browsers
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```HTML
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<script src="https://raw.github.com/leizongmin/js-xss/master/build/xss.js"></script>
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<script>
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// 使用函数名 filterXSS,用法一样
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// apply function filterXSS in the same way
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var html = filterXSS('<script>alert("xss");</scr' + 'ipt>');
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alert(html);
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</script>
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```
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## 自定义过滤规则
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## Custom filter rules
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在调用 `xss()` 函数进行过滤时,可通过第二个参数来设置自定义规则:
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When using the `xss()` function, the second parameter could be used to specify
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custom rules:
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```JavaScript
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options = {}; // 自定义规则
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options = {}; // Custom rules
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html = xss('<script>alert("xss");</script>', options);
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```
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如果不想每次都传入一个 `options` 参数,可以创建一个 `FilterXSS` 实例
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(使用这种方法速度更快):
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To avoid passing `options` every time, you can also do it in a faster way by
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creating a `FilterXSS` instance:
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```
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options = {}; // 自定义规则
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```JavaScript
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options = {}; // Custom rules
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myxss = new xss.FilterXSS(options);
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// 以后直接调用 myxss.process() 来处理即可
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// then apply myxss.process()
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html = myxss.process('<script>alert("xss");</script>');
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```
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`options` 参数的详细说明见下文。
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Details of parameters in `options` would be described below.
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### 白名单
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### Whitelist
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通过 `whiteList` 来指定,格式为:`{'标签名': ['属性1', '属性2']}`。不在白名单上
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的标签将被过滤,不在白名单上的属性也会被过滤。以下是示例:
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By specefing a `whiteList`, e.g. `{ 'tagName': [ 'attr-1', 'attr-2' ] }`. Tags
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and attributes not in the whitelist would be filter out. For example:
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```JavaScript
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// 只允许a标签,该标签只允许href, title, target这三个属性
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// only tag a and its attributes href, title, target are allowed
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var options = {
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whiteList: {
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a: ['href', 'title', 'target']
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}
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};
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// 使用以上配置后,下面的HTML
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// <a href="#" onclick="hello()"><i>大家好</i></a>
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// 将被过滤为
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// <a href="#">大家好</a>
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// With the configuration specified above, the following HTML:
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// <a href="#" onclick="hello()"><i>Hello</i></a>
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// would become:
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// <a href="#">Hello</a>
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```
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默认白名单参考 `xss.whiteList`。
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For the default whitelist, please refer `xss.whiteList`.
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### 自定义匹配到标签时的处理方法
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### Customize the handler function for matched tags
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通过 `onTag` 来指定相应的处理函数。以下是详细说明:
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By specefing the handler function with `onTag`:
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```JavaScript
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function onTag (tag, html, options) {
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// tag是当前的标签名称,比如<a>标签,则tag的值是'a'
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// html是该标签的HTML,比如<a>标签,则html的值是'<a>'
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// options是一些附加的信息,具体如下:
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// isWhite boolean类型,表示该标签是否在白名单上
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// isClosing boolean类型,表示该标签是否为闭合标签,比如</a>时为true
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// position integer类型,表示当前标签在输出的结果中的起始位置
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// sourcePosition integer类型,表示当前标签在原HTML中的起始位置
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// 如果返回一个字符串,则当前标签将被替换为该字符串
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// 如果不返回任何值,则使用默认的处理方法:
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// 在白名单上: 通过onTagAttr来过滤属性,详见下文
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// 不在白名单上:通过onIgnoreTag指定,详见下文
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// tag is the name of current tag, e.g. 'a' for tag <a>
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// html is the HTML of this tag, e.g. '<a>' for tag <a>
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// options is some addition informations:
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// isWhite boolean, whether the tag is in whitelist
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// isClosing boolean, whether the tag is a closing tag, e.g. true for </a>
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// position integer, the position of the tag in output result
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// sourcePosition integer, the position of the tag in input HTML source
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// If a string is returned, the current tag would be replaced with the string
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// If return nothing, the default measure would be taken:
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// If in whitelist: filter attributes using onTagAttr, as described below
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// If not in whitelist: handle by onIgnoreTag, as described below
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}
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```
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### 自定义匹配到标签的属性时的处理方法
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### Customize the handler function for attributes of matched tags
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通过 `onTagAttr` 来指定相应的处理函数。以下是详细说明:
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By specefing the handler function with `onTagAttr`:
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```JavaScript
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function onTagAttr (tag, name, value, isWhiteAttr) {
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// tag是当前的标签名称,比如<a>标签,则tag的值是'a'
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// name是当前属性的名称,比如href="#",则name的值是'href'
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// value是当前属性的值,比如href="#",则value的值是'#'
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// isWhiteAttr是否为白名单上的属性
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// 如果返回一个字符串,则当前属性值将被替换为该字符串
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// 如果不返回任何值,则使用默认的处理方法
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// 在白名单上: 调用safeAttrValue来过滤属性值,并输出该属性,详见下文
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// 不在白名单上:通过onIgnoreTagAttr指定,详见下文
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// tag is the name of current tag, e.g. 'a' for tag <a>
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// name is the name of current attribute, e.g. 'href' for href="#"
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// isWhiteAttr whether the tag is in whitelist
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// If a string is returned, the attribute would be replaced with the string
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// If return nothing, the default measure would be taken:
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// If in whitelist: filter the value using safeAttrValue as described below
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// If not in whitelist: handle by onIgnoreTagAttr, as described below
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}
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```
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### 自定义匹配到不在白名单上的标签时的处理方法
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### Customize the handler function for tags not in the whitelist
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通过 `onIgnoreTag` 来指定相应的处理函数。以下是详细说明:
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By specefing the handler function with `onIgnoreTag`:
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```JavaScript
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function onIgnoreTag (tag, html, options) {
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// 参数说明与onTag相同
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// 如果返回一个字符串,则当前标签将被替换为该字符串
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// 如果不返回任何值,则使用默认的处理方法(通过escape指定,详见下文)
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// Parameters are the same with onTag
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// If a string is returned, the tag would be replaced with the string
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// If return nothing, the default measure would be taken (specifies using
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// escape, as described below)
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}
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```
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### 自定义匹配到不在白名单上的属性时的处理方法
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### Customize the handler function for attributes not in the whitelist
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通过 `onIgnoreTagAttr` 来指定相应的处理函数。以下是详细说明:
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By specefing the handler function with `onIgnoreTagAttr`:
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```JavaScript
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function onIgnoreTagAttr (tag, name, value, isWhiteAttr) {
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// 参数说明与onTagAttr相同
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// 如果返回一个字符串,则当前属性值将被替换为该字符串
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// 如果不返回任何值,则使用默认的处理方法(删除该属)
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// Parameters are the same with onTagAttr
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// If a string is returned, the value would be replaced with this string
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// If return nothing, then keep default (remove the attribute)
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}
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```
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### 自定义HTML转义函数
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### Customize escaping function for HTML
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通过 `escapeHtml` 来指定相应的处理函数。以下是默认代码 **(不建议修改)** :
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By specefing the handler function with `escapeHtml`. Following is the default
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function **(Modification is not recommended)**:
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```JavaScript
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function escapeHtml (html) {
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@@ -198,73 +206,73 @@ function escapeHtml (html) {
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}
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```
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### 自定义标签属性值的转义函数
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### Customize escaping function for value of attributes
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通过 `safeAttrValue` 来指定相应的处理函数。以下是详细说明:
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By specefing the handler function with `safeAttrValue`:
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```JavaScript
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function safeAttrValue (tag, name, value) {
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// 参数说明与onTagAttr相同(没有options参数)
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// 返回一个字符串表示该属性值
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// Parameters are the same with onTagAttr (without options)
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// Return the value as a string
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}
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```
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### 快捷配置
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### Quick Start
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#### 去掉不在白名单只的标签
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#### Filter out tags not in the whitelist
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通过 `stripIgnoreTag` 来设置:
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By using `stripIgnoreTag` parameter:
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+ `true`:(默认),去掉不在白名单上的标签
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+ `false`:使用配置的`escape`函数对该标签进行转义
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+ `true` by default: filter out tags not in the whitelist
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+ `false`: escape the tag using configured `escape` function
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示例:
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Example:
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当设置 `stripIgnoreTag = true`时,以下代码
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If `stripIgnoreTag = true` is set, the following code:
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```HTML
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code:<script>alert(/xss/);</script>
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```
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过滤后将输出
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would output filtered:
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```HTML
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code:alert(/xss/);
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```
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#### 去掉不在白名单上的标签及标签体
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#### Filter out tags and tag bodies not in the whitelist
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通过 `stripIgnoreTagBody` 来设置:
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By using `stripIgnoreTagBody` parameter:
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+ `false|null|undefined`:(默认),不特殊处理
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+ `'*'|true`:去掉所有不在白名单上的标签
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+ `['tag1', 'tag2']`:仅去掉指定的不在白名单上的标签
|
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+ `false|null|undefined` by default: do nothing
|
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+ `'*'|true`: filter out all tags not in the whitelist
|
||||
+ `['tag1', 'tag2']`: filter out only specified tags not in the whitelist
|
||||
|
||||
示例:
|
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Example:
|
||||
|
||||
当设置 `stripIgnoreTagBody = ['script']`时,以下代码
|
||||
If `stripIgnoreTagBody = ['script']` is set, the following code:
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||||
|
||||
```HTML
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code:<script>alert(/xss/);</script>
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```
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||||
|
||||
过滤后将输出
|
||||
would output filtered:
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||||
|
||||
```HTML
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||||
code:
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||||
```
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## 应用实例
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## Examples
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||||
|
||||
### 允许标签以data-开头的属性
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### Allow tags start with `data-`
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```JavaScript
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var source = '<div a="1" b="2" data-a="3" data-b="4">hello</div>';
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var html = xss(source, {
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onIgnoreTagAttr: function (tag, name, value, isWhiteAttr) {
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if (name.substr(0, 5) === 'data-') {
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// 通过内置的escapeAttrValue函数来对属性值进行转义
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||||
// escape its value using built-in escapeAttrValue function
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||||
return name + '="' + xss.escapeAttrValue(value) + '"';
|
||||
}
|
||||
}
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||||
@@ -273,7 +281,7 @@ var html = xss(source, {
|
||||
console.log('%s\nconvert to:\n%s', source, html);
|
||||
```
|
||||
|
||||
运行结果:
|
||||
Result:
|
||||
|
||||
```
|
||||
<div a="1" b="2" data-a="3" data-b="4">hello</div>
|
||||
@@ -281,14 +289,14 @@ convert to:
|
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<div data-a="3" data-b="4">hello</div>
|
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```
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||||
|
||||
### 允许名称以x-开头的标签
|
||||
### Allow tags start with `x-`
|
||||
|
||||
```JavaScript
|
||||
var source = '<x><x-1>he<x-2 checked></x-2>wwww</x-1><a>';
|
||||
var html = xss(source, {
|
||||
onIgnoreTag: function (tag, html, options) {
|
||||
if (tag.substr(0, 2) === 'x-') {
|
||||
// 不对其属性列表进行过滤
|
||||
// do not filter its attributes
|
||||
return html;
|
||||
}
|
||||
}
|
||||
@@ -297,7 +305,7 @@ var html = xss(source, {
|
||||
console.log('%s\nconvert to:\n%s', source, html);
|
||||
```
|
||||
|
||||
运行结果:
|
||||
Result:
|
||||
|
||||
```
|
||||
<x><x-1>he<x-2 checked></x-2>wwww</x-1><a>
|
||||
@@ -305,7 +313,7 @@ convert to:
|
||||
<x><x-1>he<x-2 checked></x-2>wwww</x-1><a>
|
||||
```
|
||||
|
||||
### 分析HTML代码中的图片列表
|
||||
### Parse images in HTML
|
||||
|
||||
```JavaScript
|
||||
var source = '<img src="img1">a<img src="img2">b<img src="img3">c<img src="img4">d';
|
||||
@@ -313,37 +321,40 @@ var list = [];
|
||||
var html = xss(source, {
|
||||
onTagAttr: function (tag, name, value, isWhiteAttr) {
|
||||
if (tag === 'img' && name === 'src') {
|
||||
// 使用内置的friendlyAttrValue函数来对属性值进行转义,可将<这类的实体标记转换成打印字符<
|
||||
// Use the built-in friendlyAttrValue function to escape attribute
|
||||
// values. It supports converting entity tags such as < to printable
|
||||
// characters such as <
|
||||
list.push(xss.friendlyAttrValue(value));
|
||||
}
|
||||
// 不返回任何值,表示还是按照默认的方法处理
|
||||
// Return nothing, means keep the default handling measure
|
||||
}
|
||||
});
|
||||
|
||||
console.log('image list:\n%s', list.join(', '));
|
||||
```
|
||||
|
||||
运行结果:
|
||||
Result:
|
||||
|
||||
```
|
||||
image list:
|
||||
img1, img2, img3, img4
|
||||
```
|
||||
|
||||
### 去除HTML标签(只保留文本内容)
|
||||
### Filter out HTML tags (keeps only plain text)
|
||||
|
||||
```JavaScript
|
||||
var source = '<strong>hello</strong><script>alert(/xss/);</script>end';
|
||||
var html = xss(source, {
|
||||
whiteList: [], // 白名单为空,表示过滤所有标签
|
||||
stripIgnoreTag: true, // 过滤所有非白名单标签的HTML
|
||||
stripIgnoreTagBody: ['script'] // script标签较特殊,需要过滤标签中间的内容
|
||||
whiteList: [], // empty, means filter out all tags
|
||||
stripIgnoreTag: true, // filter out all HTML not in the whilelist
|
||||
stripIgnoreTagBody: ['script'] // the script tag is a special case, we need
|
||||
// to filter out its content
|
||||
});
|
||||
|
||||
console.log('text: %s', html);
|
||||
```
|
||||
|
||||
运行结果:
|
||||
Result:
|
||||
|
||||
```
|
||||
text: helloend
|
||||
@@ -355,8 +366,8 @@ text: helloend
|
||||
The MIT License
|
||||
|
||||
|
||||
## 捐赠
|
||||
## Donate
|
||||
|
||||
如果您觉得xss模块对您有帮助,欢迎请作者一杯咖啡
|
||||
If you love the xss module, please send me a cup of coffee :)
|
||||
|
||||
[](https://me.alipay.com/leizongmin)
|
||||
|
||||
362
README.zh.md
Normal file
362
README.zh.md
Normal file
@@ -0,0 +1,362 @@
|
||||
[](http://badge.fury.io/js/xss)
|
||||
[](http://travis-ci.org/leizongmin/js-xss)
|
||||
[](https://david-dm.org/leizongmin/js-xss)
|
||||
|
||||
根据白名单过滤HTML(防止XSS攻击)
|
||||
======
|
||||
|
||||

|
||||
|
||||
--------------
|
||||
|
||||
**注意:0.1.x版本与0.0.x版本在自定义配置(除白名单配置外)格式上有较大改动,如果
|
||||
要使用新版本,请详细阅读下文的使用说明**
|
||||
|
||||
|
||||
`xss`是一个用于对用户输入的内容进行过滤,以避免遭受XSS攻击的模块
|
||||
([什么是XSS攻击?](http://baike.baidu.com/view/2161269.htm))。只要用于论坛、博客、网上商店等等一些可允许用户录入页面排版、
|
||||
格式控制相关的HTML的场景,`xss`模块通过白名单来控制允许的标签及相关的标签属性,
|
||||
另外还提供了一系列的接口以便用户扩展,比其他同类模块更为灵活。
|
||||
|
||||
**项目主页:** https://github.com/leizongmin/js-xss
|
||||
|
||||
---------------
|
||||
|
||||
|
||||
## 特性
|
||||
|
||||
+ 白名单控制允许的HTML标签及各标签的属性
|
||||
+ 通过自定义处理函数,可对任意标签及其属性进行处理
|
||||
|
||||
|
||||
## 参考资料
|
||||
|
||||
+ [XSS与字符编码的那些事儿 ---科普文](http://drops.wooyun.org/tips/689)
|
||||
+ [腾讯实例教程:那些年我们一起学XSS](http://www.wooyun.org/whitehats/%E5%BF%83%E4%BC%A4%E7%9A%84%E7%98%A6%E5%AD%90)
|
||||
+ [XSS Filter Evasion Cheat Sheet](https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet)
|
||||
+ [Data URI scheme](http://en.wikipedia.org/wiki/Data_URI_scheme)
|
||||
+ [XSS with Data URI Scheme](http://hi.baidu.com/badzzzz/item/bdbafe83144619c199255f7b)
|
||||
|
||||
|
||||
## 性能(仅作参考)
|
||||
|
||||
+ xss模块:8.2 MB/s
|
||||
+ validator@0.3.7模块的xss()函数:4.4 MB/s
|
||||
|
||||
测试代码参考 benchmark 目录
|
||||
|
||||
|
||||
## 单元测试
|
||||
|
||||
在源码目录执行命令: `npm test`
|
||||
|
||||
|
||||
## 在线测试
|
||||
|
||||
在源码目录执行命令: `node lib/cli.js` ,可在命令行中输入HTML代码,并看到过滤后的代码
|
||||
|
||||
|
||||
## 使用方法
|
||||
|
||||
### 在Node.js中使用
|
||||
|
||||
安装:
|
||||
|
||||
```bash
|
||||
$ npm install xss
|
||||
```
|
||||
|
||||
简单使用方法:
|
||||
|
||||
```JavaScript
|
||||
var xss = require('xss');
|
||||
var html = xss('<script>alert("xss");</script>');
|
||||
console.log(html);
|
||||
```
|
||||
|
||||
### 在浏览器端使用
|
||||
|
||||
```HTML
|
||||
<script src="https://raw.github.com/leizongmin/js-xss/master/build/xss.js"></script>
|
||||
<script>
|
||||
// 使用函数名 filterXSS,用法一样
|
||||
var html = filterXSS('<script>alert("xss");</scr' + 'ipt>');
|
||||
alert(html);
|
||||
</script>
|
||||
```
|
||||
|
||||
|
||||
## 自定义过滤规则
|
||||
|
||||
在调用 `xss()` 函数进行过滤时,可通过第二个参数来设置自定义规则:
|
||||
|
||||
```JavaScript
|
||||
options = {}; // 自定义规则
|
||||
html = xss('<script>alert("xss");</script>', options);
|
||||
```
|
||||
|
||||
如果不想每次都传入一个 `options` 参数,可以创建一个 `FilterXSS` 实例
|
||||
(使用这种方法速度更快):
|
||||
|
||||
```
|
||||
options = {}; // 自定义规则
|
||||
myxss = new xss.FilterXSS(options);
|
||||
// 以后直接调用 myxss.process() 来处理即可
|
||||
html = myxss.process('<script>alert("xss");</script>');
|
||||
```
|
||||
|
||||
`options` 参数的详细说明见下文。
|
||||
|
||||
### 白名单
|
||||
|
||||
通过 `whiteList` 来指定,格式为:`{'标签名': ['属性1', '属性2']}`。不在白名单上
|
||||
的标签将被过滤,不在白名单上的属性也会被过滤。以下是示例:
|
||||
|
||||
```JavaScript
|
||||
// 只允许a标签,该标签只允许href, title, target这三个属性
|
||||
var options = {
|
||||
whiteList: {
|
||||
a: ['href', 'title', 'target']
|
||||
}
|
||||
};
|
||||
// 使用以上配置后,下面的HTML
|
||||
// <a href="#" onclick="hello()"><i>大家好</i></a>
|
||||
// 将被过滤为
|
||||
// <a href="#">大家好</a>
|
||||
```
|
||||
|
||||
默认白名单参考 `xss.whiteList`。
|
||||
|
||||
### 自定义匹配到标签时的处理方法
|
||||
|
||||
通过 `onTag` 来指定相应的处理函数。以下是详细说明:
|
||||
|
||||
```JavaScript
|
||||
function onTag (tag, html, options) {
|
||||
// tag是当前的标签名称,比如<a>标签,则tag的值是'a'
|
||||
// html是该标签的HTML,比如<a>标签,则html的值是'<a>'
|
||||
// options是一些附加的信息,具体如下:
|
||||
// isWhite boolean类型,表示该标签是否在白名单上
|
||||
// isClosing boolean类型,表示该标签是否为闭合标签,比如</a>时为true
|
||||
// position integer类型,表示当前标签在输出的结果中的起始位置
|
||||
// sourcePosition integer类型,表示当前标签在原HTML中的起始位置
|
||||
// 如果返回一个字符串,则当前标签将被替换为该字符串
|
||||
// 如果不返回任何值,则使用默认的处理方法:
|
||||
// 在白名单上: 通过onTagAttr来过滤属性,详见下文
|
||||
// 不在白名单上:通过onIgnoreTag指定,详见下文
|
||||
}
|
||||
```
|
||||
|
||||
### 自定义匹配到标签的属性时的处理方法
|
||||
|
||||
通过 `onTagAttr` 来指定相应的处理函数。以下是详细说明:
|
||||
|
||||
```JavaScript
|
||||
function onTagAttr (tag, name, value, isWhiteAttr) {
|
||||
// tag是当前的标签名称,比如<a>标签,则tag的值是'a'
|
||||
// name是当前属性的名称,比如href="#",则name的值是'href'
|
||||
// value是当前属性的值,比如href="#",则value的值是'#'
|
||||
// isWhiteAttr是否为白名单上的属性
|
||||
// 如果返回一个字符串,则当前属性值将被替换为该字符串
|
||||
// 如果不返回任何值,则使用默认的处理方法
|
||||
// 在白名单上: 调用safeAttrValue来过滤属性值,并输出该属性,详见下文
|
||||
// 不在白名单上:通过onIgnoreTagAttr指定,详见下文
|
||||
}
|
||||
```
|
||||
|
||||
### 自定义匹配到不在白名单上的标签时的处理方法
|
||||
|
||||
通过 `onIgnoreTag` 来指定相应的处理函数。以下是详细说明:
|
||||
|
||||
```JavaScript
|
||||
function onIgnoreTag (tag, html, options) {
|
||||
// 参数说明与onTag相同
|
||||
// 如果返回一个字符串,则当前标签将被替换为该字符串
|
||||
// 如果不返回任何值,则使用默认的处理方法(通过escape指定,详见下文)
|
||||
}
|
||||
```
|
||||
|
||||
### 自定义匹配到不在白名单上的属性时的处理方法
|
||||
|
||||
通过 `onIgnoreTagAttr` 来指定相应的处理函数。以下是详细说明:
|
||||
|
||||
```JavaScript
|
||||
function onIgnoreTagAttr (tag, name, value, isWhiteAttr) {
|
||||
// 参数说明与onTagAttr相同
|
||||
// 如果返回一个字符串,则当前属性值将被替换为该字符串
|
||||
// 如果不返回任何值,则使用默认的处理方法(删除该属)
|
||||
}
|
||||
```
|
||||
|
||||
### 自定义HTML转义函数
|
||||
|
||||
通过 `escapeHtml` 来指定相应的处理函数。以下是默认代码 **(不建议修改)** :
|
||||
|
||||
```JavaScript
|
||||
function escapeHtml (html) {
|
||||
return html.replace(/</g, '<').replace(/>/g, '>');
|
||||
}
|
||||
```
|
||||
|
||||
### 自定义标签属性值的转义函数
|
||||
|
||||
通过 `safeAttrValue` 来指定相应的处理函数。以下是详细说明:
|
||||
|
||||
```JavaScript
|
||||
function safeAttrValue (tag, name, value) {
|
||||
// 参数说明与onTagAttr相同(没有options参数)
|
||||
// 返回一个字符串表示该属性值
|
||||
}
|
||||
```
|
||||
|
||||
### 快捷配置
|
||||
|
||||
#### 去掉不在白名单只的标签
|
||||
|
||||
通过 `stripIgnoreTag` 来设置:
|
||||
|
||||
+ `true`:(默认),去掉不在白名单上的标签
|
||||
+ `false`:使用配置的`escape`函数对该标签进行转义
|
||||
|
||||
示例:
|
||||
|
||||
当设置 `stripIgnoreTag = true`时,以下代码
|
||||
|
||||
```HTML
|
||||
code:<script>alert(/xss/);</script>
|
||||
```
|
||||
|
||||
过滤后将输出
|
||||
|
||||
```HTML
|
||||
code:alert(/xss/);
|
||||
```
|
||||
|
||||
#### 去掉不在白名单上的标签及标签体
|
||||
|
||||
通过 `stripIgnoreTagBody` 来设置:
|
||||
|
||||
+ `false|null|undefined`:(默认),不特殊处理
|
||||
+ `'*'|true`:去掉所有不在白名单上的标签
|
||||
+ `['tag1', 'tag2']`:仅去掉指定的不在白名单上的标签
|
||||
|
||||
示例:
|
||||
|
||||
当设置 `stripIgnoreTagBody = ['script']`时,以下代码
|
||||
|
||||
```HTML
|
||||
code:<script>alert(/xss/);</script>
|
||||
```
|
||||
|
||||
过滤后将输出
|
||||
|
||||
```HTML
|
||||
code:
|
||||
```
|
||||
|
||||
|
||||
## 应用实例
|
||||
|
||||
### 允许标签以data-开头的属性
|
||||
|
||||
```JavaScript
|
||||
var source = '<div a="1" b="2" data-a="3" data-b="4">hello</div>';
|
||||
var html = xss(source, {
|
||||
onIgnoreTagAttr: function (tag, name, value, isWhiteAttr) {
|
||||
if (name.substr(0, 5) === 'data-') {
|
||||
// 通过内置的escapeAttrValue函数来对属性值进行转义
|
||||
return name + '="' + xss.escapeAttrValue(value) + '"';
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
console.log('%s\nconvert to:\n%s', source, html);
|
||||
```
|
||||
|
||||
运行结果:
|
||||
|
||||
```
|
||||
<div a="1" b="2" data-a="3" data-b="4">hello</div>
|
||||
convert to:
|
||||
<div data-a="3" data-b="4">hello</div>
|
||||
```
|
||||
|
||||
### 允许名称以x-开头的标签
|
||||
|
||||
```JavaScript
|
||||
var source = '<x><x-1>he<x-2 checked></x-2>wwww</x-1><a>';
|
||||
var html = xss(source, {
|
||||
onIgnoreTag: function (tag, html, options) {
|
||||
if (tag.substr(0, 2) === 'x-') {
|
||||
// 不对其属性列表进行过滤
|
||||
return html;
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
console.log('%s\nconvert to:\n%s', source, html);
|
||||
```
|
||||
|
||||
运行结果:
|
||||
|
||||
```
|
||||
<x><x-1>he<x-2 checked></x-2>wwww</x-1><a>
|
||||
convert to:
|
||||
<x><x-1>he<x-2 checked></x-2>wwww</x-1><a>
|
||||
```
|
||||
|
||||
### 分析HTML代码中的图片列表
|
||||
|
||||
```JavaScript
|
||||
var source = '<img src="img1">a<img src="img2">b<img src="img3">c<img src="img4">d';
|
||||
var list = [];
|
||||
var html = xss(source, {
|
||||
onTagAttr: function (tag, name, value, isWhiteAttr) {
|
||||
if (tag === 'img' && name === 'src') {
|
||||
// 使用内置的friendlyAttrValue函数来对属性值进行转义,可将<这类的实体标记转换成打印字符<
|
||||
list.push(xss.friendlyAttrValue(value));
|
||||
}
|
||||
// 不返回任何值,表示还是按照默认的方法处理
|
||||
}
|
||||
});
|
||||
|
||||
console.log('image list:\n%s', list.join(', '));
|
||||
```
|
||||
|
||||
运行结果:
|
||||
|
||||
```
|
||||
image list:
|
||||
img1, img2, img3, img4
|
||||
```
|
||||
|
||||
### 去除HTML标签(只保留文本内容)
|
||||
|
||||
```JavaScript
|
||||
var source = '<strong>hello</strong><script>alert(/xss/);</script>end';
|
||||
var html = xss(source, {
|
||||
whiteList: [], // 白名单为空,表示过滤所有标签
|
||||
stripIgnoreTag: true, // 过滤所有非白名单标签的HTML
|
||||
stripIgnoreTagBody: ['script'] // script标签较特殊,需要过滤标签中间的内容
|
||||
});
|
||||
|
||||
console.log('text: %s', html);
|
||||
```
|
||||
|
||||
运行结果:
|
||||
|
||||
```
|
||||
text: helloend
|
||||
```
|
||||
|
||||
|
||||
## License
|
||||
|
||||
The MIT License
|
||||
|
||||
|
||||
## 捐赠
|
||||
|
||||
如果您觉得xss模块对您有帮助,欢迎请作者一杯咖啡
|
||||
|
||||
[](https://me.alipay.com/leizongmin)
|
||||
Reference in New Issue
Block a user