/** * @license AngularJS v1.1.5 * (c) 2010-2012 Google, Inc. http://angularjs.org * License: MIT */ (function(window, angular, undefined) { 'use strict'; /** * @ngdoc overview * @name ngSanitize * @description */ /* * HTML Parser By Misko Hevery (misko@hevery.com) * based on: HTML Parser By John Resig (ejohn.org) * Original code by Erik Arvidsson, Mozilla Public License * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js * * // Use like so: * htmlParser(htmlString, { * start: function(tag, attrs, unary) {}, * end: function(tag) {}, * chars: function(text) {}, * comment: function(text) {} * }); * */ /** * @ngdoc service * @name ngSanitize.$sanitize * @function * * @description * The input is sanitized by parsing the html into tokens. All safe tokens (from a whitelist) are * then serialized back to properly escaped html string. This means that no unsafe input can make * it into the returned string, however, since our parser is more strict than a typical browser * parser, it's possible that some obscure input, which would be recognized as valid HTML by a * browser, won't make it through the sanitizer. * * @param {string} html Html input. * @returns {string} Sanitized html. * * @example
Snippet:
Filter Source Rendered
html filter
<div ng-bind-html="snippet">
</div>
no filter
<div ng-bind="snippet">
</div>
unsafe html filter
<div ng-bind-html-unsafe="snippet">
</div>
it('should sanitize the html snippet ', function() { expect(using('#html-filter').element('div').html()). toBe('

an html\nclick here\nsnippet

'); }); it('should escape snippet without any filter', function() { expect(using('#escaped-html').element('div').html()). toBe("<p style=\"color:blue\">an html\n" + "<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" + "snippet</p>"); }); it('should inline raw snippet if filtered as unsafe', function() { expect(using('#html-unsafe-filter').element("div").html()). toBe("

an html\n" + "click here\n" + "snippet

"); }); it('should update', function() { input('snippet').enter('new text'); expect(using('#html-filter').binding('snippet')).toBe('new text'); expect(using('#escaped-html').element('div').html()).toBe("new <b>text</b>"); expect(using('#html-unsafe-filter').binding("snippet")).toBe('new text'); });
*/ var $sanitize = function(html) { var buf = []; htmlParser(html, htmlSanitizeWriter(buf)); return buf.join(''); }; // Regular Expressions for parsing tags and attributes var START_TAG_REGEXP = /^<\s*([\w:-]+)((?:\s+[\w:-]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)\s*>/, END_TAG_REGEXP = /^<\s*\/\s*([\w:-]+)[^>]*>/, ATTR_REGEXP = /([\w:-]+)(?:\s*=\s*(?:(?:"((?:[^"])*)")|(?:'((?:[^'])*)')|([^>\s]+)))?/g, BEGIN_TAG_REGEXP = /^/g, CDATA_REGEXP = //g, URI_REGEXP = /^((ftp|https?):\/\/|mailto:|tel:|#)/, NON_ALPHANUMERIC_REGEXP = /([^\#-~| |!])/g; // Match everything outside of normal chars and " (quote character) // Good source of info about elements and attributes // http://dev.w3.org/html5/spec/Overview.html#semantics // http://simon.html5.org/html-elements // Safe Void Elements - HTML5 // http://dev.w3.org/html5/spec/Overview.html#void-elements var voidElements = makeMap("area,br,col,hr,img,wbr"); // Elements that you can, intentionally, leave open (and which close themselves) // http://dev.w3.org/html5/spec/Overview.html#optional-tags var optionalEndTagBlockElements = makeMap("colgroup,dd,dt,li,p,tbody,td,tfoot,th,thead,tr"), optionalEndTagInlineElements = makeMap("rp,rt"), optionalEndTagElements = angular.extend({}, optionalEndTagInlineElements, optionalEndTagBlockElements); // Safe Block Elements - HTML5 var blockElements = angular.extend({}, optionalEndTagBlockElements, makeMap("address,article,aside," + "blockquote,caption,center,del,dir,div,dl,figure,figcaption,footer,h1,h2,h3,h4,h5,h6," + "header,hgroup,hr,ins,map,menu,nav,ol,pre,script,section,table,ul")); // Inline Elements - HTML5 var inlineElements = angular.extend({}, optionalEndTagInlineElements, makeMap("a,abbr,acronym,b,bdi,bdo," + "big,br,cite,code,del,dfn,em,font,i,img,ins,kbd,label,map,mark,q,ruby,rp,rt,s,samp,small," + "span,strike,strong,sub,sup,time,tt,u,var")); // Special Elements (can contain anything) var specialElements = makeMap("script,style"); var validElements = angular.extend({}, voidElements, blockElements, inlineElements, optionalEndTagElements); //Attributes that have href and hence need to be sanitized var uriAttrs = makeMap("background,cite,href,longdesc,src,usemap"); var validAttrs = angular.extend({}, uriAttrs, makeMap( 'abbr,align,alt,axis,bgcolor,border,cellpadding,cellspacing,class,clear,'+ 'color,cols,colspan,compact,coords,dir,face,headers,height,hreflang,hspace,'+ 'ismap,lang,language,nohref,nowrap,rel,rev,rows,rowspan,rules,'+ 'scope,scrolling,shape,span,start,summary,target,title,type,'+ 'valign,value,vspace,width')); function makeMap(str) { var obj = {}, items = str.split(','), i; for (i = 0; i < items.length; i++) obj[items[i]] = true; return obj; } /** * @example * htmlParser(htmlString, { * start: function(tag, attrs, unary) {}, * end: function(tag) {}, * chars: function(text) {}, * comment: function(text) {} * }); * * @param {string} html string * @param {object} handler */ function htmlParser( html, handler ) { var index, chars, match, stack = [], last = html; stack.last = function() { return stack[ stack.length - 1 ]; }; while ( html ) { chars = true; // Make sure we're not in a script or style element if ( !stack.last() || !specialElements[ stack.last() ] ) { // Comment if ( html.indexOf(""); if ( index >= 0 ) { if (handler.comment) handler.comment( html.substring( 4, index ) ); html = html.substring( index + 3 ); chars = false; } // end tag } else if ( BEGING_END_TAGE_REGEXP.test(html) ) { match = html.match( END_TAG_REGEXP ); if ( match ) { html = html.substring( match[0].length ); match[0].replace( END_TAG_REGEXP, parseEndTag ); chars = false; } // start tag } else if ( BEGIN_TAG_REGEXP.test(html) ) { match = html.match( START_TAG_REGEXP ); if ( match ) { html = html.substring( match[0].length ); match[0].replace( START_TAG_REGEXP, parseStartTag ); chars = false; } } if ( chars ) { index = html.indexOf("<"); var text = index < 0 ? html : html.substring( 0, index ); html = index < 0 ? "" : html.substring( index ); if (handler.chars) handler.chars( decodeEntities(text) ); } } else { html = html.replace(new RegExp("(.*)<\\s*\\/\\s*" + stack.last() + "[^>]*>", 'i'), function(all, text){ text = text. replace(COMMENT_REGEXP, "$1"). replace(CDATA_REGEXP, "$1"); if (handler.chars) handler.chars( decodeEntities(text) ); return ""; }); parseEndTag( "", stack.last() ); } if ( html == last ) { throw "Parse Error: " + html; } last = html; } // Clean up any remaining tags parseEndTag(); function parseStartTag( tag, tagName, rest, unary ) { tagName = angular.lowercase(tagName); if ( blockElements[ tagName ] ) { while ( stack.last() && inlineElements[ stack.last() ] ) { parseEndTag( "", stack.last() ); } } if ( optionalEndTagElements[ tagName ] && stack.last() == tagName ) { parseEndTag( "", tagName ); } unary = voidElements[ tagName ] || !!unary; if ( !unary ) stack.push( tagName ); var attrs = {}; rest.replace(ATTR_REGEXP, function(match, name, doubleQuotedValue, singleQoutedValue, unqoutedValue) { var value = doubleQuotedValue || singleQoutedValue || unqoutedValue || ''; attrs[name] = decodeEntities(value); }); if (handler.start) handler.start( tagName, attrs, unary ); } function parseEndTag( tag, tagName ) { var pos = 0, i; tagName = angular.lowercase(tagName); if ( tagName ) // Find the closest opened tag of the same type for ( pos = stack.length - 1; pos >= 0; pos-- ) if ( stack[ pos ] == tagName ) break; if ( pos >= 0 ) { // Close all the open elements, up the stack for ( i = stack.length - 1; i >= pos; i-- ) if (handler.end) handler.end( stack[ i ] ); // Remove the open elements from the stack stack.length = pos; } } } /** * decodes all entities into regular string * @param value * @returns {string} A string with decoded entities. */ var hiddenPre=document.createElement("pre"); function decodeEntities(value) { hiddenPre.innerHTML=value.replace(//g, '>'); } /** * create an HTML/XML writer which writes to buffer * @param {Array} buf use buf.jain('') to get out sanitized html string * @returns {object} in the form of { * start: function(tag, attrs, unary) {}, * end: function(tag) {}, * chars: function(text) {}, * comment: function(text) {} * } */ function htmlSanitizeWriter(buf){ var ignore = false; var out = angular.bind(buf, buf.push); return { start: function(tag, attrs, unary){ tag = angular.lowercase(tag); if (!ignore && specialElements[tag]) { ignore = tag; } if (!ignore && validElements[tag] == true) { out('<'); out(tag); angular.forEach(attrs, function(value, key){ var lkey=angular.lowercase(key); if (validAttrs[lkey]==true && (uriAttrs[lkey]!==true || value.match(URI_REGEXP))) { out(' '); out(key); out('="'); out(encodeEntities(value)); out('"'); } }); out(unary ? '/>' : '>'); } }, end: function(tag){ tag = angular.lowercase(tag); if (!ignore && validElements[tag] == true) { out(''); } if (tag == ignore) { ignore = false; } }, chars: function(chars){ if (!ignore) { out(encodeEntities(chars)); } } }; } // define ngSanitize module and register $sanitize service angular.module('ngSanitize', []).value('$sanitize', $sanitize); /** * @ngdoc directive * @name ngSanitize.directive:ngBindHtml * * @description * Creates a binding that will sanitize the result of evaluating the `expression` with the * {@link ngSanitize.$sanitize $sanitize} service and innerHTML the result into the current element. * * See {@link ngSanitize.$sanitize $sanitize} docs for examples. * * @element ANY * @param {expression} ngBindHtml {@link guide/expression Expression} to evaluate. */ angular.module('ngSanitize').directive('ngBindHtml', ['$sanitize', function($sanitize) { return function(scope, element, attr) { element.addClass('ng-binding').data('$binding', attr.ngBindHtml); scope.$watch(attr.ngBindHtml, function ngBindHtmlWatchAction(value) { value = $sanitize(value); element.html(value || ''); }); }; }]); /** * @ngdoc filter * @name ngSanitize.filter:linky * @function * * @description * Finds links in text input and turns them into html links. Supports http/https/ftp/mailto and * plain email address links. * * @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 * * @example
Snippet:
Filter Source Rendered
linky filter
<div ng-bind-html="snippet | linky">
</div>
linky target
<div ng-bind-html="snippetWithTarget | linky:'_blank'">
</div>
no filter
<div ng-bind="snippet">
</div>
it('should linkify the snippet with urls', function() { expect(using('#linky-filter').binding('snippet | linky')). toBe('Pretty text with some links: ' + 'http://angularjs.org/, ' + 'us@somewhere.org, ' + 'another@somewhere.org, ' + 'and one more: ftp://127.0.0.1/.'); }); it ('should not linkify snippet without the linky filter', function() { expect(using('#escaped-html').binding('snippet')). toBe("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/."); }); it('should update', function() { input('snippet').enter('new http://link.'); expect(using('#linky-filter').binding('snippet | linky')). toBe('new http://link.'); expect(using('#escaped-html').binding('snippet')).toBe('new http://link.'); }); it('should work with the target property', function() { expect(using('#linky-target').binding("snippetWithTarget | linky:'_blank'")). toBe('http://angularjs.org/'); }); */ angular.module('ngSanitize').filter('linky', function() { 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 = []; // TODO(vojta): use $sanitize instead var writer = htmlSanitizeWriter(html); var url; var i; var properties = {}; if (angular.isDefined(target)) { properties.target = target; } 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; writer.chars(raw.substr(0, i)); properties.href = url; writer.start('a', properties); writer.chars(match[0].replace(MAILTO_REGEXP, '')); writer.end('a'); raw = raw.substring(i + match[0].length); } writer.chars(raw); return html.join(''); }; }); })(window, window.angular);