From 70aa7a5cb9de83c0966985618d6e6d4d4400dd0d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Anton=20Luka=20=C5=A0ijanec?= Date: Sun, 9 Feb 2020 00:38:26 +0100 Subject: added images support to messages and removed npm and node modules dependency --- node_modules/xss/README.md | 499 --------------------------------------------- 1 file changed, 499 deletions(-) delete mode 100644 node_modules/xss/README.md (limited to 'node_modules/xss/README.md') diff --git a/node_modules/xss/README.md b/node_modules/xss/README.md deleted file mode 100644 index 4f202f1..0000000 --- a/node_modules/xss/README.md +++ /dev/null @@ -1,499 +0,0 @@ -[![NPM version][npm-image]][npm-url] -[![build status][travis-image]][travis-url] -[![Test coverage][coveralls-image]][coveralls-url] -[![David deps][david-image]][david-url] -[![node version][node-image]][node-url] -[![npm download][download-image]][download-url] -[![npm license][license-image]][download-url] - -[npm-image]: https://img.shields.io/npm/v/xss.svg?style=flat-square -[npm-url]: https://npmjs.org/package/xss -[travis-image]: https://img.shields.io/travis/leizongmin/js-xss.svg?style=flat-square -[travis-url]: https://travis-ci.org/leizongmin/js-xss -[coveralls-image]: https://img.shields.io/coveralls/leizongmin/js-xss.svg?style=flat-square -[coveralls-url]: https://coveralls.io/r/leizongmin/js-xss?branch=master -[david-image]: https://img.shields.io/david/leizongmin/js-xss.svg?style=flat-square -[david-url]: https://david-dm.org/leizongmin/js-xss -[node-image]: https://img.shields.io/badge/node.js-%3E=_0.10-green.svg?style=flat-square -[node-url]: http://nodejs.org/download/ -[download-image]: https://img.shields.io/npm/dm/xss.svg?style=flat-square -[download-url]: https://npmjs.org/package/xss -[license-image]: https://img.shields.io/npm/l/xss.svg - -# Sanitize untrusted HTML (to prevent XSS) with a configuration specified by a Whitelist. - -[![Greenkeeper badge](https://badges.greenkeeper.io/leizongmin/js-xss.svg)](https://greenkeeper.io/) - -![xss](https://nodei.co/npm/xss.png?downloads=true&stars=true) - ---- - -`xss` is a module used to filter input from users to prevent XSS attacks. -([What is XSS attack?](http://en.wikipedia.org/wiki/Cross-site_scripting)) - -**Project Homepage:** http://jsxss.com - -**Try Online:** http://jsxss.com/en/try.html - -**[中文版文档](https://github.com/leizongmin/js-xss/blob/master/README.zh.md)** - ---- - -## Features - -* Specifies HTML tags and their attributes allowed with whitelist -* Handle any tags or attributes using custom function. - -## Reference - -* [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) - -## Benchmark (for references only) - -* the xss module: 8.2 MB/s -* `xss()` function from module `validator@0.3.7`: 4.4 MB/s - -For test code please refer to `benchmark` directory. - -## They are using xss module - -* **nodeclub** - A Node.js bbs using MongoDB - https://github.com/cnodejs/nodeclub -* **cnpmjs.org** - Private npm registry and web for Enterprise - https://github.com/cnpm/cnpmjs.org - -## Install - -### NPM - -```bash -npm install xss -``` - -### Bower - -```bash -bower install xss -``` - -Or - -```bash -bower install https://github.com/leizongmin/js-xss.git -``` - -## Usages - -### On Node.js - -```javascript -var xss = require("xss"); -var html = xss(''); -console.log(html); -``` - -### On Browser - -Shim mode (reference file `test/test.html`): - -```html - - -``` - -AMD mode - shim: - -```html - -``` - -**Notes: please don't use the URL https://rawgit.com/leizongmin/js-xss/master/dist/xss.js in production environment.** - -## Command Line Tool - -### Process File - -You can use the xss command line tool to process a file. Usage: - -```bash -xss -i -o -``` - -Example: - -```bash -xss -i origin.html -o target.html -``` - -### Active Test - -Run the following command, them you can type HTML -code in the command-line, and check the filtered output: - -```bash -xss -t -``` - -For more details, please run `$ xss -h` to see it. - -## Custom filter rules - -When using the `xss()` function, the second parameter could be used to specify -custom rules: - -```javascript -options = {}; // Custom rules -html = xss('', options); -``` - -To avoid passing `options` every time, you can also do it in a faster way by -creating a `FilterXSS` instance: - -```javascript -options = {}; // Custom rules -myxss = new xss.FilterXSS(options); -// then apply myxss.process() -html = myxss.process(''); -``` - -Details of parameters in `options` would be described below. - -### Whitelist - -By specifying a `whiteList`, e.g. `{ 'tagName': [ 'attr-1', 'attr-2' ] }`. Tags -and attributes not in the whitelist would be filter out. For example: - -```javascript -// only tag a and its attributes href, title, target are allowed -var options = { - whiteList: { - a: ["href", "title", "target"] - } -}; -// With the configuration specified above, the following HTML: -// Hello -// would become: -// Hello -``` - -For the default whitelist, please refer `xss.whiteList`. - -### Customize the handler function for matched tags - -By specifying the handler function with `onTag`: - -```javascript -function onTag(tag, html, options) { - // tag is the name of current tag, e.g. 'a' for tag - // html is the HTML of this tag, e.g. '' for tag - // options is some addition informations: - // isWhite boolean, whether the tag is in whitelist - // isClosing boolean, whether the tag is a closing tag, e.g. true for - // position integer, the position of the tag in output result - // sourcePosition integer, the position of the tag in input HTML source - // If a string is returned, the current tag would be replaced with the string - // If return nothing, the default measure would be taken: - // If in whitelist: filter attributes using onTagAttr, as described below - // If not in whitelist: handle by onIgnoreTag, as described below -} -``` - -### Customize the handler function for attributes of matched tags - -By specifying the handler function with `onTagAttr`: - -```javascript -function onTagAttr(tag, name, value, isWhiteAttr) { - // tag is the name of current tag, e.g. 'a' for tag - // name is the name of current attribute, e.g. 'href' for href="#" - // isWhiteAttr whether the attribute is in whitelist - // If a string is returned, the attribute would be replaced with the string - // If return nothing, the default measure would be taken: - // If in whitelist: filter the value using safeAttrValue as described below - // If not in whitelist: handle by onIgnoreTagAttr, as described below -} -``` - -### Customize the handler function for tags not in the whitelist - -By specifying the handler function with `onIgnoreTag`: - -```javascript -function onIgnoreTag(tag, html, options) { - // Parameters are the same with onTag - // If a string is returned, the tag would be replaced with the string - // If return nothing, the default measure would be taken (specifies using - // escape, as described below) -} -``` - -### Customize the handler function for attributes not in the whitelist - -By specifying the handler function with `onIgnoreTagAttr`: - -```javascript -function onIgnoreTagAttr(tag, name, value, isWhiteAttr) { - // Parameters are the same with onTagAttr - // If a string is returned, the value would be replaced with this string - // If return nothing, then keep default (remove the attribute) -} -``` - -### Customize escaping function for HTML - -By specifying the handler function with `escapeHtml`. Following is the default -function **(Modification is not recommended)**: - -```javascript -function escapeHtml(html) { - return html.replace(//g, ">"); -} -``` - -### Customize escaping function for value of attributes - -By specifying the handler function with `safeAttrValue`: - -```javascript -function safeAttrValue(tag, name, value) { - // Parameters are the same with onTagAttr (without options) - // Return the value as a string -} -``` - -### Customize CSS filter - -If you allow the attribute `style`, the value will be processed by [cssfilter](https://github.com/leizongmin/js-css-filter) module. The cssfilter module includes a default css whitelist. You can specify the options for cssfilter module like this: - -```javascript -myxss = new xss.FilterXSS({ - css: { - whiteList: { - position: /^fixed|relative$/, - top: true, - left: true - } - } -}); -html = myxss.process(''); -``` - -If you don't want to filter out the `style` content, just specify `false` to the `css` option: - -```javascript -myxss = new xss.FilterXSS({ - css: false -}); -``` - -For more help, please see https://github.com/leizongmin/js-css-filter - -### Quick Start - -#### Filter out tags not in the whitelist - -By using `stripIgnoreTag` parameter: - -* `true` filter out tags not in the whitelist -* `false`: by default: escape the tag using configured `escape` function - -Example: - -If `stripIgnoreTag = true` is set, the following code: - -```html -code: -``` - -would output filtered: - -```html -code:alert(/xss/); -``` - -#### Filter out tags and tag bodies not in the whitelist - -By using `stripIgnoreTagBody` parameter: - -* `false|null|undefined` by default: do nothing -* `'*'|true`: filter out all tags not in the whitelist -* `['tag1', 'tag2']`: filter out only specified tags not in the whitelist - -Example: - -If `stripIgnoreTagBody = ['script']` is set, the following code: - -```html -code: -``` - -would output filtered: - -```html -code: -``` - -#### Filter out HTML comments - -By using `allowCommentTag` parameter: - -* `true`: do nothing -* `false` by default: filter out HTML comments - -Example: - -If `allowCommentTag = false` is set, the following code: - -```html -code: END -``` - -would output filtered: - -```html -code: END -``` - -## Examples - -### Allow attributes of whitelist tags start with `data-` - -```javascript -var source = '
hello
'; -var html = xss(source, { - onIgnoreTagAttr: function(tag, name, value, isWhiteAttr) { - if (name.substr(0, 5) === "data-") { - // escape its value using built-in escapeAttrValue function - return name + '="' + xss.escapeAttrValue(value) + '"'; - } - } -}); - -console.log("%s\nconvert to:\n%s", source, html); -``` - -Result: - -```html -
hello
-convert to: -
hello
-``` - -### Allow tags start with `x-` - -```javascript -var source = "hewwww"; -var html = xss(source, { - onIgnoreTag: function(tag, html, options) { - if (tag.substr(0, 2) === "x-") { - // do not filter its attributes - return html; - } - } -}); - -console.log("%s\nconvert to:\n%s", source, html); -``` - -Result: - -```html -hewwww -convert to: -<x>hewwww -``` - -### Parse images in HTML - -```javascript -var source = - 'abcd'; -var list = []; -var html = xss(source, { - onTagAttr: function(tag, name, value, isWhiteAttr) { - if (tag === "img" && name === "src") { - // 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)); - } - // Return nothing, means keep the default handling measure - } -}); - -console.log("image list:\n%s", list.join(", ")); -``` - -Result: - -```html -image list: -img1, img2, img3, img4 -``` - -### Filter out HTML tags (keeps only plain text) - -```javascript -var source = "helloend"; -var html = xss(source, { - 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); -``` - -Result: - -```html -text: helloend -``` - -## License - -```text -Copyright (c) 2012-2018 Zongmin Lei(雷宗民) -http://ucdok.com - -The MIT License - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE -LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -``` -- cgit v1.2.3