meetups/meetup06-MobileDev/x-platform/ionic/js/angular/angular-sanitize.js
/**
* @license AngularJS v1.4.3
* (c) 2010-2015 Google, Inc. http://angularjs.org
* License: MIT
*/
(function(window, angular, undefined) {'use strict';
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Any commits to this file should be reviewed with security in mind. *
* Changes to this file can potentially create security vulnerabilities. *
* An approval from 2 Core members with history of modifying *
* this file is required. *
* *
* Does the change somehow allow for arbitrary javascript to be executed? *
* Or allows for someone to change the prototype of built-in objects? *
* Or gives undesired access to variables likes document or window? *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
var $sanitizeMinErr = angular.$$minErr('$sanitize');
/**
* @ngdoc module
* @name ngSanitize
* @description
*
* # ngSanitize
*
* The `ngSanitize` module provides functionality to sanitize HTML.
*
*
* <div doc-module-components="ngSanitize"></div>
*
* See {@link ngSanitize.$sanitize `$sanitize`} for usage.
*/
/*
* 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 $sanitize
* @kind 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. The input may also contain SVG markup.
* The whitelist is configured using the functions `aHrefSanitizationWhitelist` and
* `imgSrcSanitizationWhitelist` of {@link ng.$compileProvider `$compileProvider`}.
*
* @param {string} html HTML input.
* @returns {string} Sanitized HTML.
*
* @example
<example module="sanitizeExample" deps="angular-sanitize.js">
<file name="index.html">
<script>
angular.module('sanitizeExample', ['ngSanitize'])
.controller('ExampleController', ['$scope', '$sce', function($scope, $sce) {
$scope.snippet =
'<p style="color:blue">an html\n' +
'<em onmouseover="this.textContent=\'PWN3D!\'">click here</em>\n' +
'snippet</p>';
$scope.deliberatelyTrustDangerousSnippet = function() {
return $sce.trustAsHtml($scope.snippet);
};
}]);
</script>
<div ng-controller="ExampleController">
Snippet: <textarea ng-model="snippet" cols="60" rows="3"></textarea>
<table>
<tr>
<td>Directive</td>
<td>How</td>
<td>Source</td>
<td>Rendered</td>
</tr>
<tr id="bind-html-with-sanitize">
<td>ng-bind-html</td>
<td>Automatically uses $sanitize</td>
<td><pre><div ng-bind-html="snippet"><br/></div></pre></td>
<td><div ng-bind-html="snippet"></div></td>
</tr>
<tr id="bind-html-with-trust">
<td>ng-bind-html</td>
<td>Bypass $sanitize by explicitly trusting the dangerous value</td>
<td>
<pre><div ng-bind-html="deliberatelyTrustDangerousSnippet()">
</div></pre>
</td>
<td><div ng-bind-html="deliberatelyTrustDangerousSnippet()"></div></td>
</tr>
<tr id="bind-default">
<td>ng-bind</td>
<td>Automatically escapes</td>
<td><pre><div ng-bind="snippet"><br/></div></pre></td>
<td><div ng-bind="snippet"></div></td>
</tr>
</table>
</div>
</file>
<file name="protractor.js" type="protractor">
it('should sanitize the html snippet by default', function() {
expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
toBe('<p>an html\n<em>click here</em>\nsnippet</p>');
});
it('should inline raw snippet if bound to a trusted value', function() {
expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).
toBe("<p style=\"color:blue\">an html\n" +
"<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
"snippet</p>");
});
it('should escape snippet without any filter', function() {
expect(element(by.css('#bind-default div')).getInnerHtml()).
toBe("<p style=\"color:blue\">an html\n" +
"<em onmouseover=\"this.textContent='PWN3D!'\">click here</em>\n" +
"snippet</p>");
});
it('should update', function() {
element(by.model('snippet')).clear();
element(by.model('snippet')).sendKeys('new <b onclick="alert(1)">text</b>');
expect(element(by.css('#bind-html-with-sanitize div')).getInnerHtml()).
toBe('new <b>text</b>');
expect(element(by.css('#bind-html-with-trust div')).getInnerHtml()).toBe(
'new <b onclick="alert(1)">text</b>');
expect(element(by.css('#bind-default div')).getInnerHtml()).toBe(
"new <b onclick=\"alert(1)\">text</b>");
});
</file>
</example>
*/
function $SanitizeProvider() {
this.$get = ['$$sanitizeUri', function($$sanitizeUri) {
return function(html) {
var buf = [];
htmlParser(html, htmlSanitizeWriter(buf, function(uri, isImage) {
return !/^unsafe/.test($$sanitizeUri(uri, isImage));
}));
return buf.join('');
};
}];
}
function sanitizeText(chars) {
var buf = [];
var writer = htmlSanitizeWriter(buf, angular.noop);
writer.chars(chars);
return buf.join('');
}
// Regular Expressions for parsing tags and attributes
var START_TAG_REGEXP =
/^<((?:[a-zA-Z])[\w:-]*)((?:\s+[\w:-]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)\s*(>?)/,
END_TAG_REGEXP = /^<\/\s*([\w:-]+)[^>]*>/,
ATTR_REGEXP = /([\w:-]+)(?:\s*=\s*(?:(?:"((?:[^"])*)")|(?:'((?:[^'])*)')|([^>\s]+)))?/g,
BEGIN_TAG_REGEXP = /^</,
BEGING_END_TAGE_REGEXP = /^<\//,
COMMENT_REGEXP = /<!--(.*?)-->/g,
DOCTYPE_REGEXP = /<!DOCTYPE([^>]*?)>/i,
CDATA_REGEXP = /<!\[CDATA\[(.*?)]]>/g,
SURROGATE_PAIR_REGEXP = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
// Match everything outside of normal chars and " (quote character)
NON_ALPHANUMERIC_REGEXP = /([^\#-~| |!])/g;
// 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"));
// SVG Elements
// https://wiki.whatwg.org/wiki/Sanitization_rules#svg_Elements
// Note: the elements animate,animateColor,animateMotion,animateTransform,set are intentionally omitted.
// They can potentially allow for arbitrary javascript to be executed. See #11290
var svgElements = makeMap("circle,defs,desc,ellipse,font-face,font-face-name,font-face-src,g,glyph," +
"hkern,image,linearGradient,line,marker,metadata,missing-glyph,mpath,path,polygon,polyline," +
"radialGradient,rect,stop,svg,switch,text,title,tspan,use");
// Special Elements (can contain anything)
var specialElements = makeMap("script,style");
var validElements = angular.extend({},
voidElements,
blockElements,
inlineElements,
optionalEndTagElements,
svgElements);
//Attributes that have href and hence need to be sanitized
var uriAttrs = makeMap("background,cite,href,longdesc,src,usemap,xlink:href");
var htmlAttrs = 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,size,span,start,summary,tabindex,target,title,type,' +
'valign,value,vspace,width');
// SVG attributes (without "id" and "name" attributes)
// https://wiki.whatwg.org/wiki/Sanitization_rules#svg_Attributes
var svgAttrs = makeMap('accent-height,accumulate,additive,alphabetic,arabic-form,ascent,' +
'baseProfile,bbox,begin,by,calcMode,cap-height,class,color,color-rendering,content,' +
'cx,cy,d,dx,dy,descent,display,dur,end,fill,fill-rule,font-family,font-size,font-stretch,' +
'font-style,font-variant,font-weight,from,fx,fy,g1,g2,glyph-name,gradientUnits,hanging,' +
'height,horiz-adv-x,horiz-origin-x,ideographic,k,keyPoints,keySplines,keyTimes,lang,' +
'marker-end,marker-mid,marker-start,markerHeight,markerUnits,markerWidth,mathematical,' +
'max,min,offset,opacity,orient,origin,overline-position,overline-thickness,panose-1,' +
'path,pathLength,points,preserveAspectRatio,r,refX,refY,repeatCount,repeatDur,' +
'requiredExtensions,requiredFeatures,restart,rotate,rx,ry,slope,stemh,stemv,stop-color,' +
'stop-opacity,strikethrough-position,strikethrough-thickness,stroke,stroke-dasharray,' +
'stroke-dashoffset,stroke-linecap,stroke-linejoin,stroke-miterlimit,stroke-opacity,' +
'stroke-width,systemLanguage,target,text-anchor,to,transform,type,u1,u2,underline-position,' +
'underline-thickness,unicode,unicode-range,units-per-em,values,version,viewBox,visibility,' +
'width,widths,x,x-height,x1,x2,xlink:actuate,xlink:arcrole,xlink:role,xlink:show,xlink:title,' +
'xlink:type,xml:base,xml:lang,xml:space,xmlns,xmlns:xlink,y,y1,y2,zoomAndPan', true);
var validAttrs = angular.extend({},
uriAttrs,
svgAttrs,
htmlAttrs);
function makeMap(str, lowercaseKeys) {
var obj = {}, items = str.split(','), i;
for (i = 0; i < items.length; i++) {
obj[lowercaseKeys ? angular.lowercase(items[i]) : 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) {
if (typeof html !== 'string') {
if (html === null || typeof html === 'undefined') {
html = '';
} else {
html = '' + html;
}
}
var index, chars, match, stack = [], last = html, text;
stack.last = function() { return stack[stack.length - 1]; };
while (html) {
text = '';
chars = true;
// Make sure we're not in a script or style element
if (!stack.last() || !specialElements[stack.last()]) {
// Comment
if (html.indexOf("<!--") === 0) {
// comments containing -- are not allowed unless they terminate the comment
index = html.indexOf("--", 4);
if (index >= 0 && html.lastIndexOf("-->", index) === index) {
if (handler.comment) handler.comment(html.substring(4, index));
html = html.substring(index + 3);
chars = false;
}
// DOCTYPE
} else if (DOCTYPE_REGEXP.test(html)) {
match = html.match(DOCTYPE_REGEXP);
if (match) {
html = html.replace(match[0], '');
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) {
// We only have a valid start-tag if there is a '>'.
if (match[4]) {
html = html.substring(match[0].length);
match[0].replace(START_TAG_REGEXP, parseStartTag);
}
chars = false;
} else {
// no ending tag found --- this piece should be encoded as an entity.
text += '<';
html = html.substring(1);
}
}
if (chars) {
index = html.indexOf("<");
text += index < 0 ? html : html.substring(0, index);
html = index < 0 ? "" : html.substring(index);
if (handler.chars) handler.chars(decodeEntities(text));
}
} else {
// IE versions 9 and 10 do not understand the regex '[^]', so using a workaround with [\W\w].
html = html.replace(new RegExp("([\\W\\w]*)<\\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 $sanitizeMinErr('badparse', "The sanitizer was unable to parse the following block " +
"of html: {0}", 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, singleQuotedValue, unquotedValue) {
var value = doubleQuotedValue
|| singleQuotedValue
|| unquotedValue
|| '';
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;
}
}
}
var hiddenPre=document.createElement("pre");
/**
* decodes all entities into regular string
* @param value
* @returns {string} A string with decoded entities.
*/
function decodeEntities(value) {
if (!value) { return ''; }
hiddenPre.innerHTML = value.replace(/</g,"<");
// innerText depends on styling as it doesn't display hidden elements.
// Therefore, it's better to use textContent not to cause unnecessary reflows.
return hiddenPre.textContent;
}
/**
* Escapes all potentially dangerous characters, so that the
* resulting string can be safely inserted into attribute or
* element text.
* @param value
* @returns {string} escaped text
*/
function encodeEntities(value) {
return value.
replace(/&/g, '&').
replace(SURROGATE_PAIR_REGEXP, function(value) {
var hi = value.charCodeAt(0);
var low = value.charCodeAt(1);
return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';';
}).
replace(NON_ALPHANUMERIC_REGEXP, function(value) {
return '&#' + value.charCodeAt(0) + ';';
}).
replace(/</g, '<').
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, uriValidator) {
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);
var isImage = (tag === 'img' && lkey === 'src') || (lkey === 'background');
if (validAttrs[lkey] === true &&
(uriAttrs[lkey] !== true || uriValidator(value, isImage))) {
out(' ');
out(key);
out('="');
out(encodeEntities(value));
out('"');
}
});
out(unary ? '/>' : '>');
}
},
end: function(tag) {
tag = angular.lowercase(tag);
if (!ignore && validElements[tag] === true) {
out('</');
out(tag);
out('>');
}
if (tag == ignore) {
ignore = false;
}
},
chars: function(chars) {
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?):\/\/|(www\.)|(mailto:)?[A-Za-z0-9._%+-]+@)\S*[^\s.;,(){}<>"”’]/i,
MAILTO_REGEXP = /^mailto:/i;
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/www/mailto then assume mailto
if (!match[2] && !match[4]) {
url = (match[3] ? 'http://' : '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="',
target,
'" ');
}
html.push('href="',
url.replace(/"/g, '"'),
'">');
addText(text);
html.push('</a>');
}
};
}]);
})(window, window.angular);