mirror of
https://github.com/element-hq/synapse
synced 2024-09-01 20:20:20 +00:00
647 lines
21 KiB
JavaScript
647 lines
21 KiB
JavaScript
/**
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* @license AngularJS v1.3.0-rc.1
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* (c) 2010-2014 Google, Inc. http://angularjs.org
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* License: MIT
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*/
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(function(window, angular, undefined) {'use strict';
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var $sanitizeMinErr = angular.$$minErr('$sanitize');
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/**
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* @ngdoc module
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* @name ngSanitize
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* @description
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*
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* # ngSanitize
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*
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* The `ngSanitize` module provides functionality to sanitize HTML.
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*
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*
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* <div doc-module-components="ngSanitize"></div>
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*
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* See {@link ngSanitize.$sanitize `$sanitize`} for usage.
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*/
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/*
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* HTML Parser By Misko Hevery (misko@hevery.com)
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* based on: HTML Parser By John Resig (ejohn.org)
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* Original code by Erik Arvidsson, Mozilla Public License
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* http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
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*
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* // Use like so:
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* htmlParser(htmlString, {
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* start: function(tag, attrs, unary) {},
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* end: function(tag) {},
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* chars: function(text) {},
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* comment: function(text) {}
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* });
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*
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*/
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/**
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* @ngdoc service
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* @name $sanitize
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* @kind function
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*
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* @description
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* The input is sanitized by parsing the html into tokens. All safe tokens (from a whitelist) are
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* then serialized back to properly escaped html string. This means that no unsafe input can make
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* it into the returned string, however, since our parser is more strict than a typical browser
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* parser, it's possible that some obscure input, which would be recognized as valid HTML by a
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* browser, won't make it through the sanitizer.
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* The whitelist is configured using the functions `aHrefSanitizationWhitelist` and
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* `imgSrcSanitizationWhitelist` of {@link ng.$compileProvider `$compileProvider`}.
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*
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* @param {string} html Html input.
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* @returns {string} Sanitized html.
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*
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* @example
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<example module="sanitizeExample" deps="angular-sanitize.js">
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<file name="index.html">
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<script>
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angular.module('sanitizeExample', ['ngSanitize'])
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.controller('ExampleController', ['$scope', '$sce', function($scope, $sce) {
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$scope.snippet =
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'<p style="color:blue">an html\n' +
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'<em onmouseover="this.textContent=\'PWN3D!\'">click here</em>\n' +
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'snippet</p>';
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$scope.deliberatelyTrustDangerousSnippet = function() {
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return $sce.trustAsHtml($scope.snippet);
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};
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}]);
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</script>
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<div ng-controller="ExampleController">
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Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
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<table>
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<tr>
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<td>Directive</td>
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<td>How</td>
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<td>Source</td>
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<td>Rendered</td>
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</tr>
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<tr id="bind-html-with-sanitize">
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<td>ng-bind-html</td>
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<td>Automatically uses $sanitize</td>
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<td><pre><div ng-bind-html="snippet"><br/></div></pre></td>
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<td><div ng-bind-html="snippet"></div></td>
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</tr>
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<tr id="bind-html-with-trust">
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<td>ng-bind-html</td>
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<td>Bypass $sanitize by explicitly trusting the dangerous value</td>
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<td>
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<pre><div ng-bind-html="deliberatelyTrustDangerousSnippet()">
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</div></pre>
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</td>
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<td><div ng-bind-html="deliberatelyTrustDangerousSnippet()"></div></td>
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</tr>
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<tr id="bind-default">
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<td>ng-bind</td>
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<td>Automatically escapes</td>
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<td><pre><div ng-bind="snippet"><br/></div></pre></td>
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<td><div ng-bind="snippet"></div></td>
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</tr>
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</table>
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</div>
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</file>
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<file name="protractor.js" type="protractor">
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it('should sanitize the html snippet by default', function() {
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expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
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toBe('<p>an html\n<em>click here</em>\nsnippet</p>');
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});
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it('should inline raw snippet if bound to a trusted value', function() {
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expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).
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toBe("<p style=\"color:blue\">an html\n" +
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"<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
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"snippet</p>");
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});
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it('should escape snippet without any filter', function() {
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expect(element(by.css('#bind-default div')).getInnerHtml()).
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toBe("<p style=\"color:blue\">an html\n" +
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"<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
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"snippet</p>");
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});
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it('should update', function() {
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element(by.model('snippet')).clear();
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element(by.model('snippet')).sendKeys('new <b onclick="alert(1)">text</b>');
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expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
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toBe('new <b>text</b>');
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expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).toBe(
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'new <b onclick="alert(1)">text</b>');
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expect(element(by.css('#bind-default div')).getInnerHtml()).toBe(
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"new <b onclick=\"alert(1)\">text</b>");
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});
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</file>
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</example>
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*/
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function $SanitizeProvider() {
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this.$get = ['$$sanitizeUri', function($$sanitizeUri) {
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return function(html) {
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var buf = [];
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htmlParser(html, htmlSanitizeWriter(buf, function(uri, isImage) {
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return !/^unsafe/.test($$sanitizeUri(uri, isImage));
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}));
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return buf.join('');
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};
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}];
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}
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function sanitizeText(chars) {
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var buf = [];
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var writer = htmlSanitizeWriter(buf, angular.noop);
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writer.chars(chars);
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return buf.join('');
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}
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// Regular Expressions for parsing tags and attributes
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var START_TAG_REGEXP =
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/^<((?:[a-zA-Z])[\w:-]*)((?:\s+[\w:-]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)\s*(>?)/,
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END_TAG_REGEXP = /^<\/\s*([\w:-]+)[^>]*>/,
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ATTR_REGEXP = /([\w:-]+)(?:\s*=\s*(?:(?:"((?:[^"])*)")|(?:'((?:[^'])*)')|([^>\s]+)))?/g,
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BEGIN_TAG_REGEXP = /^</,
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BEGING_END_TAGE_REGEXP = /^<\//,
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COMMENT_REGEXP = /<!--(.*?)-->/g,
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DOCTYPE_REGEXP = /<!DOCTYPE([^>]*?)>/i,
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CDATA_REGEXP = /<!\[CDATA\[(.*?)]]>/g,
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SURROGATE_PAIR_REGEXP = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
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// Match everything outside of normal chars and " (quote character)
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NON_ALPHANUMERIC_REGEXP = /([^\#-~| |!])/g;
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// Good source of info about elements and attributes
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// http://dev.w3.org/html5/spec/Overview.html#semantics
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// http://simon.html5.org/html-elements
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// Safe Void Elements - HTML5
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// http://dev.w3.org/html5/spec/Overview.html#void-elements
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var voidElements = makeMap("area,br,col,hr,img,wbr");
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// Elements that you can, intentionally, leave open (and which close themselves)
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// http://dev.w3.org/html5/spec/Overview.html#optional-tags
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var optionalEndTagBlockElements = makeMap("colgroup,dd,dt,li,p,tbody,td,tfoot,th,thead,tr"),
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optionalEndTagInlineElements = makeMap("rp,rt"),
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optionalEndTagElements = angular.extend({},
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optionalEndTagInlineElements,
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optionalEndTagBlockElements);
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// Safe Block Elements - HTML5
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var blockElements = angular.extend({}, optionalEndTagBlockElements, makeMap("address,article," +
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"aside,blockquote,caption,center,del,dir,div,dl,figure,figcaption,footer,h1,h2,h3,h4,h5," +
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"h6,header,hgroup,hr,ins,map,menu,nav,ol,pre,script,section,table,ul"));
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// Inline Elements - HTML5
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var inlineElements = angular.extend({}, optionalEndTagInlineElements, makeMap("a,abbr,acronym,b," +
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"bdi,bdo,big,br,cite,code,del,dfn,em,font,i,img,ins,kbd,label,map,mark,q,ruby,rp,rt,s," +
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"samp,small,span,strike,strong,sub,sup,time,tt,u,var"));
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// Special Elements (can contain anything)
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var specialElements = makeMap("script,style");
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var validElements = angular.extend({},
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voidElements,
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blockElements,
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inlineElements,
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optionalEndTagElements);
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//Attributes that have href and hence need to be sanitized
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var uriAttrs = makeMap("background,cite,href,longdesc,src,usemap");
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var validAttrs = angular.extend({}, uriAttrs, makeMap(
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'abbr,align,alt,axis,bgcolor,border,cellpadding,cellspacing,class,clear,'+
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'color,cols,colspan,compact,coords,dir,face,headers,height,hreflang,hspace,'+
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'ismap,lang,language,nohref,nowrap,rel,rev,rows,rowspan,rules,'+
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'scope,scrolling,shape,size,span,start,summary,target,title,type,'+
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'valign,value,vspace,width'));
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function makeMap(str) {
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var obj = {}, items = str.split(','), i;
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for (i = 0; i < items.length; i++) obj[items[i]] = true;
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return obj;
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}
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/**
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* @example
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* htmlParser(htmlString, {
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* start: function(tag, attrs, unary) {},
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* end: function(tag) {},
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* chars: function(text) {},
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* comment: function(text) {}
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* });
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*
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* @param {string} html string
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* @param {object} handler
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*/
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function htmlParser( html, handler ) {
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if (typeof html !== 'string') {
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if (html === null || typeof html === 'undefined') {
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html = '';
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} else {
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html = '' + html;
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}
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}
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var index, chars, match, stack = [], last = html, text;
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stack.last = function() { return stack[ stack.length - 1 ]; };
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while ( html ) {
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text = '';
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chars = true;
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// Make sure we're not in a script or style element
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if ( !stack.last() || !specialElements[ stack.last() ] ) {
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// Comment
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if ( html.indexOf("<!--") === 0 ) {
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// comments containing -- are not allowed unless they terminate the comment
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index = html.indexOf("--", 4);
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if ( index >= 0 && html.lastIndexOf("-->", index) === index) {
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if (handler.comment) handler.comment( html.substring( 4, index ) );
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html = html.substring( index + 3 );
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chars = false;
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}
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// DOCTYPE
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} else if ( DOCTYPE_REGEXP.test(html) ) {
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match = html.match( DOCTYPE_REGEXP );
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if ( match ) {
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html = html.replace( match[0], '');
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chars = false;
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}
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// end tag
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} else if ( BEGING_END_TAGE_REGEXP.test(html) ) {
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match = html.match( END_TAG_REGEXP );
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if ( match ) {
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html = html.substring( match[0].length );
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match[0].replace( END_TAG_REGEXP, parseEndTag );
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chars = false;
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}
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// start tag
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} else if ( BEGIN_TAG_REGEXP.test(html) ) {
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match = html.match( START_TAG_REGEXP );
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if ( match ) {
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// We only have a valid start-tag if there is a '>'.
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if ( match[4] ) {
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html = html.substring( match[0].length );
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match[0].replace( START_TAG_REGEXP, parseStartTag );
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}
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chars = false;
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} else {
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// no ending tag found --- this piece should be encoded as an entity.
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text += '<';
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html = html.substring(1);
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}
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}
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if ( chars ) {
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index = html.indexOf("<");
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text += index < 0 ? html : html.substring( 0, index );
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html = index < 0 ? "" : html.substring( index );
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if (handler.chars) handler.chars( decodeEntities(text) );
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}
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} else {
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html = html.replace(new RegExp("(.*)<\\s*\\/\\s*" + stack.last() + "[^>]*>", 'i'),
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function(all, text){
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text = text.replace(COMMENT_REGEXP, "$1").replace(CDATA_REGEXP, "$1");
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if (handler.chars) handler.chars( decodeEntities(text) );
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return "";
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});
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parseEndTag( "", stack.last() );
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}
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if ( html == last ) {
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throw $sanitizeMinErr('badparse', "The sanitizer was unable to parse the following block " +
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"of html: {0}", html);
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}
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last = html;
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}
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// Clean up any remaining tags
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parseEndTag();
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function parseStartTag( tag, tagName, rest, unary ) {
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tagName = angular.lowercase(tagName);
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if ( blockElements[ tagName ] ) {
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while ( stack.last() && inlineElements[ stack.last() ] ) {
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parseEndTag( "", stack.last() );
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}
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}
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if ( optionalEndTagElements[ tagName ] && stack.last() == tagName ) {
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parseEndTag( "", tagName );
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}
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unary = voidElements[ tagName ] || !!unary;
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if ( !unary )
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stack.push( tagName );
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var attrs = {};
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rest.replace(ATTR_REGEXP,
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function(match, name, doubleQuotedValue, singleQuotedValue, unquotedValue) {
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var value = doubleQuotedValue
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|| singleQuotedValue
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|| unquotedValue
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|| '';
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attrs[name] = decodeEntities(value);
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});
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if (handler.start) handler.start( tagName, attrs, unary );
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}
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function parseEndTag( tag, tagName ) {
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var pos = 0, i;
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tagName = angular.lowercase(tagName);
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if ( tagName )
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// Find the closest opened tag of the same type
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for ( pos = stack.length - 1; pos >= 0; pos-- )
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if ( stack[ pos ] == tagName )
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break;
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if ( pos >= 0 ) {
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// Close all the open elements, up the stack
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for ( i = stack.length - 1; i >= pos; i-- )
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if (handler.end) handler.end( stack[ i ] );
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// Remove the open elements from the stack
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stack.length = pos;
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}
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}
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}
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var hiddenPre=document.createElement("pre");
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var spaceRe = /^(\s*)([\s\S]*?)(\s*)$/;
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/**
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* decodes all entities into regular string
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* @param value
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* @returns {string} A string with decoded entities.
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*/
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function decodeEntities(value) {
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if (!value) { return ''; }
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// Note: IE8 does not preserve spaces at the start/end of innerHTML
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// so we must capture them and reattach them afterward
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var parts = spaceRe.exec(value);
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var spaceBefore = parts[1];
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var spaceAfter = parts[3];
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var content = parts[2];
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if (content) {
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hiddenPre.innerHTML=content.replace(/</g,"<");
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// innerText depends on styling as it doesn't display hidden elements.
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// Therefore, it's better to use textContent not to cause unnecessary
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// reflows. However, IE<9 don't support textContent so the innerText
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// fallback is necessary.
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content = 'textContent' in hiddenPre ?
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hiddenPre.textContent : hiddenPre.innerText;
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}
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return spaceBefore + content + spaceAfter;
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}
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/**
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* Escapes all potentially dangerous characters, so that the
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* resulting string can be safely inserted into attribute or
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* element text.
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* @param value
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* @returns {string} escaped text
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*/
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function encodeEntities(value) {
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return value.
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replace(/&/g, '&').
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replace(SURROGATE_PAIR_REGEXP, function (value) {
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var hi = value.charCodeAt(0);
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var low = value.charCodeAt(1);
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return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';';
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}).
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replace(NON_ALPHANUMERIC_REGEXP, function(value){
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return '&#' + value.charCodeAt(0) + ';';
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}).
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replace(/</g, '<').
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replace(/>/g, '>');
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}
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/**
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* create an HTML/XML writer which writes to buffer
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* @param {Array} buf use buf.jain('') to get out sanitized html string
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* @returns {object} in the form of {
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* start: function(tag, attrs, unary) {},
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* end: function(tag) {},
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* chars: function(text) {},
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* comment: function(text) {}
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* }
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*/
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function htmlSanitizeWriter(buf, uriValidator){
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var ignore = false;
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var out = angular.bind(buf, buf.push);
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return {
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start: function(tag, attrs, unary){
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tag = angular.lowercase(tag);
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if (!ignore && specialElements[tag]) {
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ignore = tag;
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}
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if (!ignore && validElements[tag] === true) {
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out('<');
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out(tag);
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angular.forEach(attrs, function(value, key){
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var lkey=angular.lowercase(key);
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var isImage = (tag === 'img' && lkey === 'src') || (lkey === 'background');
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if (validAttrs[lkey] === true &&
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(uriAttrs[lkey] !== true || uriValidator(value, isImage))) {
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out(' ');
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out(key);
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out('="');
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out(encodeEntities(value));
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out('"');
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}
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});
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out(unary ? '/>' : '>');
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}
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},
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end: function(tag){
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tag = angular.lowercase(tag);
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if (!ignore && validElements[tag] === true) {
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out('</');
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out(tag);
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out('>');
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}
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if (tag == ignore) {
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ignore = false;
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}
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},
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chars: function(chars){
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if (!ignore) {
|
|
out(encodeEntities(chars));
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
|
|
// define ngSanitize module and register $sanitize service
|
|
angular.module('ngSanitize', []).provider('$sanitize', $SanitizeProvider);
|
|
|
|
/* global sanitizeText: false */
|
|
|
|
/**
|
|
* @ngdoc filter
|
|
* @name linky
|
|
* @kind function
|
|
*
|
|
* @description
|
|
* Finds links in text input and turns them into html links. Supports http/https/ftp/mailto and
|
|
* plain email address links.
|
|
*
|
|
* Requires the {@link ngSanitize `ngSanitize`} module to be installed.
|
|
*
|
|
* @param {string} text Input text.
|
|
* @param {string} target Window (_blank|_self|_parent|_top) or named frame to open links in.
|
|
* @returns {string} Html-linkified text.
|
|
*
|
|
* @usage
|
|
<span ng-bind-html="linky_expression | linky"></span>
|
|
*
|
|
* @example
|
|
<example module="linkyExample" deps="angular-sanitize.js">
|
|
<file name="index.html">
|
|
<script>
|
|
angular.module('linkyExample', ['ngSanitize'])
|
|
.controller('ExampleController', ['$scope', function($scope) {
|
|
$scope.snippet =
|
|
'Pretty text with some links:\n'+
|
|
'http://angularjs.org/,\n'+
|
|
'mailto:us@somewhere.org,\n'+
|
|
'another@somewhere.org,\n'+
|
|
'and one more: ftp://127.0.0.1/.';
|
|
$scope.snippetWithTarget = 'http://angularjs.org/';
|
|
}]);
|
|
</script>
|
|
<div ng-controller="ExampleController">
|
|
Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
|
|
<table>
|
|
<tr>
|
|
<td>Filter</td>
|
|
<td>Source</td>
|
|
<td>Rendered</td>
|
|
</tr>
|
|
<tr id="linky-filter">
|
|
<td>linky filter</td>
|
|
<td>
|
|
<pre><div ng-bind-html="snippet | linky"><br></div></pre>
|
|
</td>
|
|
<td>
|
|
<div ng-bind-html="snippet | linky"></div>
|
|
</td>
|
|
</tr>
|
|
<tr id="linky-target">
|
|
<td>linky target</td>
|
|
<td>
|
|
<pre><div ng-bind-html="snippetWithTarget | linky:'_blank'"><br></div></pre>
|
|
</td>
|
|
<td>
|
|
<div ng-bind-html="snippetWithTarget | linky:'_blank'"></div>
|
|
</td>
|
|
</tr>
|
|
<tr id="escaped-html">
|
|
<td>no filter</td>
|
|
<td><pre><div ng-bind="snippet"><br></div></pre></td>
|
|
<td><div ng-bind="snippet"></div></td>
|
|
</tr>
|
|
</table>
|
|
</file>
|
|
<file name="protractor.js" type="protractor">
|
|
it('should linkify the snippet with urls', function() {
|
|
expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
|
|
toBe('Pretty text with some links: http://angularjs.org/, us@somewhere.org, ' +
|
|
'another@somewhere.org, and one more: ftp://127.0.0.1/.');
|
|
expect(element.all(by.css('#linky-filter a')).count()).toEqual(4);
|
|
});
|
|
|
|
it('should not linkify snippet without the linky filter', function() {
|
|
expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText()).
|
|
toBe('Pretty text with some links: http://angularjs.org/, mailto:us@somewhere.org, ' +
|
|
'another@somewhere.org, and one more: ftp://127.0.0.1/.');
|
|
expect(element.all(by.css('#escaped-html a')).count()).toEqual(0);
|
|
});
|
|
|
|
it('should update', function() {
|
|
element(by.model('snippet')).clear();
|
|
element(by.model('snippet')).sendKeys('new http://link.');
|
|
expect(element(by.id('linky-filter')).element(by.binding('snippet | linky')).getText()).
|
|
toBe('new http://link.');
|
|
expect(element.all(by.css('#linky-filter a')).count()).toEqual(1);
|
|
expect(element(by.id('escaped-html')).element(by.binding('snippet')).getText())
|
|
.toBe('new http://link.');
|
|
});
|
|
|
|
it('should work with the target property', function() {
|
|
expect(element(by.id('linky-target')).
|
|
element(by.binding("snippetWithTarget | linky:'_blank'")).getText()).
|
|
toBe('http://angularjs.org/');
|
|
expect(element(by.css('#linky-target a')).getAttribute('target')).toEqual('_blank');
|
|
});
|
|
</file>
|
|
</example>
|
|
*/
|
|
angular.module('ngSanitize').filter('linky', ['$sanitize', function($sanitize) {
|
|
var LINKY_URL_REGEXP =
|
|
/((ftp|https?):\/\/|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"]/,
|
|
MAILTO_REGEXP = /^mailto:/;
|
|
|
|
return function(text, target) {
|
|
if (!text) return text;
|
|
var match;
|
|
var raw = text;
|
|
var html = [];
|
|
var url;
|
|
var i;
|
|
while ((match = raw.match(LINKY_URL_REGEXP))) {
|
|
// We can not end in these as they are sometimes found at the end of the sentence
|
|
url = match[0];
|
|
// if we did not match ftp/http/mailto then assume mailto
|
|
if (match[2] == match[3]) url = 'mailto:' + url;
|
|
i = match.index;
|
|
addText(raw.substr(0, i));
|
|
addLink(url, match[0].replace(MAILTO_REGEXP, ''));
|
|
raw = raw.substring(i + match[0].length);
|
|
}
|
|
addText(raw);
|
|
return $sanitize(html.join(''));
|
|
|
|
function addText(text) {
|
|
if (!text) {
|
|
return;
|
|
}
|
|
html.push(sanitizeText(text));
|
|
}
|
|
|
|
function addLink(url, text) {
|
|
html.push('<a ');
|
|
if (angular.isDefined(target)) {
|
|
html.push('target="');
|
|
html.push(target);
|
|
html.push('" ');
|
|
}
|
|
html.push('href="');
|
|
html.push(url);
|
|
html.push('">');
|
|
addText(text);
|
|
html.push('</a>');
|
|
}
|
|
};
|
|
}]);
|
|
|
|
|
|
})(window, window.angular);
|