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stripIgnoreTagBody, allowCommentTag, stripBlankChar\n * css{whiteList, onAttr, onIgnoreAttr} `css=false` means don't use `cssfilter`\n */\nfunction FilterXSS(options) {\n options = shallowCopyObject(options || {});\n\n if (options.stripIgnoreTag) {\n if (options.onIgnoreTag) {\n console.error(\n 'Notes: cannot use these two options \"stripIgnoreTag\" and \"onIgnoreTag\" at the same time'\n );\n }\n options.onIgnoreTag = DEFAULT.onIgnoreTagStripAll;\n }\n\n options.whiteList = options.whiteList || DEFAULT.whiteList;\n options.onTag = options.onTag || DEFAULT.onTag;\n options.onTagAttr = options.onTagAttr || DEFAULT.onTagAttr;\n options.onIgnoreTag = options.onIgnoreTag || DEFAULT.onIgnoreTag;\n options.onIgnoreTagAttr = options.onIgnoreTagAttr || DEFAULT.onIgnoreTagAttr;\n options.safeAttrValue = options.safeAttrValue || DEFAULT.safeAttrValue;\n options.escapeHtml = options.escapeHtml || DEFAULT.escapeHtml;\n this.options = options;\n\n if (options.css === false) {\n this.cssFilter = false;\n } else {\n options.css = options.css || {};\n this.cssFilter = new FilterCSS(options.css);\n }\n}\n\n/**\n * start process and returns result\n *\n * @param {String} html\n * @return {String}\n */\nFilterXSS.prototype.process = function(html) {\n // compatible with the input\n html = html || \"\";\n html = html.toString();\n if (!html) return \"\";\n\n var me = this;\n var options = me.options;\n var whiteList = options.whiteList;\n var onTag = options.onTag;\n var onIgnoreTag = options.onIgnoreTag;\n var onTagAttr = options.onTagAttr;\n var onIgnoreTagAttr = options.onIgnoreTagAttr;\n var safeAttrValue = options.safeAttrValue;\n var escapeHtml = options.escapeHtml;\n var cssFilter = me.cssFilter;\n\n // remove invisible characters\n if (options.stripBlankChar) {\n html = DEFAULT.stripBlankChar(html);\n }\n\n // remove html comments\n if (!options.allowCommentTag) {\n html = DEFAULT.stripCommentTag(html);\n }\n\n // if enable stripIgnoreTagBody\n var stripIgnoreTagBody = false;\n if (options.stripIgnoreTagBody) {\n var stripIgnoreTagBody = DEFAULT.StripTagBody(\n options.stripIgnoreTagBody,\n onIgnoreTag\n );\n onIgnoreTag = stripIgnoreTagBody.onIgnoreTag;\n }\n\n var retHtml = parseTag(\n html,\n function(sourcePosition, position, tag, html, isClosing) {\n var info = {\n sourcePosition: sourcePosition,\n position: position,\n isClosing: isClosing,\n isWhite: whiteList.hasOwnProperty(tag)\n };\n\n // call `onTag()`\n var ret = onTag(tag, html, info);\n if (!isNull(ret)) return ret;\n\n if (info.isWhite) {\n if (info.isClosing) {\n return \"\";\n }\n\n var attrs = getAttrs(html);\n var whiteAttrList = whiteList[tag];\n var attrsHtml = parseAttr(attrs.html, function(name, value) {\n // call `onTagAttr()`\n var isWhiteAttr = _.indexOf(whiteAttrList, name) !== -1;\n var ret = onTagAttr(tag, name, value, isWhiteAttr);\n if (!isNull(ret)) return ret;\n\n if (isWhiteAttr) {\n // call `safeAttrValue()`\n value = safeAttrValue(tag, name, value, cssFilter);\n if (value) {\n return name + '=\"' + value + '\"';\n } else {\n return name;\n }\n } else {\n // call `onIgnoreTagAttr()`\n var ret = onIgnoreTagAttr(tag, name, value, isWhiteAttr);\n if (!isNull(ret)) return ret;\n return;\n }\n });\n\n // build new tag html\n var html = \"<\" + tag;\n if (attrsHtml) html += \" \" + attrsHtml;\n if (attrs.closing) html += \" /\";\n html += \">\";\n return html;\n } else {\n // call `onIgnoreTag()`\n var ret = onIgnoreTag(tag, html, info);\n if (!isNull(ret)) return ret;\n return escapeHtml(html);\n }\n },\n escapeHtml\n );\n\n // if enable stripIgnoreTagBody\n if (stripIgnoreTagBody) {\n retHtml = stripIgnoreTagBody.remove(retHtml);\n }\n\n return retHtml;\n};\n\nmodule.exports = FilterXSS;\n","/**\n * Simple HTML Parser\n *\n * @author Zongmin Lei\n */\n\nvar _ = require(\"./util\");\n\n/**\n * get tag name\n *\n * @param {String} html e.g. ''\n * @return {String}\n */\nfunction getTagName(html) {\n var i = _.spaceIndex(html);\n if (i === -1) {\n var tagName = html.slice(1, -1);\n } else {\n var tagName = html.slice(1, i + 1);\n }\n tagName = _.trim(tagName).toLowerCase();\n if (tagName.slice(0, 1) === \"/\") tagName = tagName.slice(1);\n if (tagName.slice(-1) === \"/\") tagName = tagName.slice(0, -1);\n return tagName;\n}\n\n/**\n * is close tag?\n *\n * @param {String} html 如：''\n * @return {Boolean}\n */\nfunction isClosing(html) {\n return html.slice(0, 2) === \"\") {\n rethtml += escapeHtml(html.slice(lastPos, tagStart));\n currentHtml = html.slice(tagStart, currentPos + 1);\n currentTagName = getTagName(currentHtml);\n rethtml += onTag(\n tagStart,\n rethtml.length,\n currentTagName,\n currentHtml,\n isClosing(currentHtml)\n );\n lastPos = currentPos + 1;\n tagStart = false;\n continue;\n }\n if ((c === '\"' || c === \"'\") && html.charAt(currentPos - 1) === \"=\") {\n quoteStart = c;\n continue;\n }\n } else {\n if (c === quoteStart) {\n quoteStart = false;\n continue;\n }\n }\n }\n }\n if (lastPos < html.length) {\n rethtml += escapeHtml(html.substr(lastPos));\n }\n\n return rethtml;\n}\n\nvar REGEXP_ILLEGAL_ATTR_NAME = /[^a-zA-Z0-9_:\\.\\-]/gim;\n\n/**\n * parse input attributes and returns processed attributes\n *\n * @param {String} html e.g. `href=\"#\" target=\"_blank\"`\n * @param {Function} onAttr e.g. `function (name, value)`\n * @return {String}\n */\nfunction parseAttr(html, onAttr) {\n \"use strict\";\n\n var lastPos = 0;\n var retAttrs = [];\n var tmpName = false;\n var len = html.length;\n\n function addAttr(name, value) {\n name = _.trim(name);\n name = name.replace(REGEXP_ILLEGAL_ATTR_NAME, \"\").toLowerCase();\n if (name.length < 1) return;\n var ret = onAttr(name, value || \"\");\n if (ret) retAttrs.push(ret);\n }\n\n // 逐个分析字符\n for (var i = 0; i < len; i++) {\n var c = html.charAt(i);\n var v, j;\n if (tmpName === false && c === \"=\") {\n tmpName = html.slice(lastPos, i);\n lastPos = i + 1;\n continue;\n }\n if (tmpName !== false) {\n if (\n i === lastPos &&\n (c === '\"' || c === \"'\") &&\n html.charAt(i - 1) === \"=\"\n ) {\n j = html.indexOf(c, i + 1);\n if (j === -1) {\n break;\n } else {\n v = _.trim(html.slice(lastPos + 1, j));\n addAttr(tmpName, v);\n tmpName = false;\n i = j;\n lastPos = i + 1;\n continue;\n }\n }\n }\n if (/\\s|\\n|\\t/.test(c)) {\n html = html.replace(/\\s|\\n|\\t/g, \" \");\n if (tmpName === false) {\n j = findNextEqual(html, i);\n if (j === -1) {\n v = _.trim(html.slice(lastPos, i));\n addAttr(v);\n tmpName = false;\n lastPos = i + 1;\n continue;\n } else {\n i = j - 1;\n continue;\n }\n } else {\n j = findBeforeEqual(html, i - 1);\n if (j === -1) {\n v = _.trim(html.slice(lastPos, i));\n v = stripQuoteWrap(v);\n addAttr(tmpName, v);\n tmpName = false;\n lastPos = i + 1;\n continue;\n } else {\n continue;\n }\n }\n }\n }\n\n if (lastPos < html.length) {\n if (tmpName === false) {\n addAttr(html.slice(lastPos));\n } else {\n addAttr(tmpName, stripQuoteWrap(_.trim(html.slice(lastPos))));\n }\n }\n\n return _.trim(retAttrs.join(\" \"));\n}\n\nfunction findNextEqual(str, i) {\n for (; i < str.length; i++) {\n var c = str[i];\n if (c === \" \") continue;\n if (c === \"=\") return i;\n return -1;\n }\n}\n\nfunction findBeforeEqual(str, i) {\n for (; i > 0; i--) {\n var c = str[i];\n if (c === \" \") continue;\n if (c === \"=\") return i;\n return -1;\n }\n}\n\nfunction isQuoteWrapString(text) {\n if (\n (text[0] === '\"' && text[text.length - 1] === '\"') ||\n (text[0] === \"'\" && text[text.length - 1] === \"'\")\n ) {\n return true;\n } else {\n return false;\n }\n}\n\nfunction stripQuoteWrap(text) {\n if (isQuoteWrapString(text)) {\n return text.substr(1, text.length - 2);\n } else {\n return text;\n }\n}\n\nexports.parseTag = parseTag;\nexports.parseAttr = parseAttr;\n","/**\n * xss\n *\n * @author Zongmin Lei\n */\n\nvar DEFAULT = require(\"./default\");\nvar parser = require(\"./parser\");\nvar FilterXSS = require(\"./xss\");\n\n/**\n * filter xss function\n *\n * @param {String} html\n * @param {Object} options { whiteList, onTag, onTagAttr, onIgnoreTag, onIgnoreTagAttr, safeAttrValue, escapeHtml }\n * @return {String}\n */\nfunction filterXSS(html, options) {\n var xss = new FilterXSS(options);\n return xss.process(html);\n}\n\nexports = module.exports = filterXSS;\nexports.filterXSS = filterXSS;\nexports.FilterXSS = FilterXSS;\nfor (var i in DEFAULT) exports[i] = DEFAULT[i];\nfor (var i in parser) exports[i] = parser[i];\n\n// using `xss` on the browser, output `filterXSS` to the globals\nif (typeof window !== \"undefined\") {\n window.filterXSS = module.exports;\n}\n\n// using `xss` on the WebWorker, output `filterXSS` to the globals\nfunction isWorkerEnv() {\n return typeof self !== 'undefined' && typeof DedicatedWorkerGlobalScope !== 'undefined' && self instanceof DedicatedWorkerGlobalScope;\n}\nif (isWorkerEnv()) {\n self.filterXSS = module.exports;\n}\n","/**\n * default settings\n *\n * @author Zongmin Lei\n */\n\nvar FilterCSS = require(\"cssfilter\").FilterCSS;\nvar getDefaultCSSWhiteList = require(\"cssfilter\").getDefaultWhiteList;\nvar _ = require(\"./util\");\n\nfunction getDefaultWhiteList() {\n return {\n a: [\"target\", \"href\", \"title\"],\n abbr: [\"title\"],\n address: [],\n area: [\"shape\", \"coords\", \"href\", \"alt\"],\n article: [],\n aside: [],\n audio: [\"autoplay\", \"controls\", \"loop\", \"preload\", \"src\"],\n b: [],\n bdi: [\"dir\"],\n bdo: [\"dir\"],\n big: [],\n blockquote: [\"cite\"],\n br: [],\n caption: [],\n center: [],\n cite: [],\n code: [],\n col: [\"align\", \"valign\", \"span\", \"width\"],\n colgroup: [\"align\", \"valign\", \"span\", \"width\"],\n dd: [],\n del: [\"datetime\"],\n details: [\"open\"],\n div: [],\n dl: [],\n dt: [],\n em: [],\n font: [\"color\", \"size\", \"face\"],\n footer: [],\n h1: [],\n h2: [],\n h3: [],\n h4: [],\n h5: [],\n h6: [],\n header: [],\n hr: [],\n i: [],\n img: [\"src\", \"alt\", \"title\", \"width\", \"height\"],\n ins: [\"datetime\"],\n li: [],\n mark: [],\n nav: [],\n ol: [],\n p: [],\n pre: [],\n s: [],\n section: [],\n small: [],\n span: [],\n sub: [],\n sup: [],\n strong: [],\n table: [\"width\", \"border\", \"align\", \"valign\"],\n tbody: [\"align\", \"valign\"],\n td: [\"width\", \"rowspan\", \"colspan\", \"align\", \"valign\"],\n tfoot: [\"align\", \"valign\"],\n th: [\"width\", \"rowspan\", \"colspan\", \"align\", \"valign\"],\n thead: [\"align\", \"valign\"],\n tr: [\"rowspan\", \"align\", \"valign\"],\n tt: [],\n u: [],\n ul: [],\n video: [\"autoplay\", \"controls\", \"loop\", \"preload\", \"src\", \"height\", \"width\"]\n };\n}\n\nvar defaultCSSFilter = new FilterCSS();\n\n/**\n * default onTag function\n *\n * @param {String} tag\n * @param {String} html\n * @param {Object} options\n * @return {String}\n */\nfunction onTag(tag, html, options) {\n // do nothing\n}\n\n/**\n * default onIgnoreTag function\n *\n * @param {String} tag\n * @param {String} html\n * @param {Object} options\n * @return {String}\n */\nfunction onIgnoreTag(tag, html, options) {\n // do nothing\n}\n\n/**\n * default onTagAttr function\n *\n * @param {String} tag\n * @param {String} name\n * @param {String} value\n * @return {String}\n */\nfunction onTagAttr(tag, name, value) {\n // do nothing\n}\n\n/**\n * default onIgnoreTagAttr function\n *\n * @param {String} tag\n * @param {String} name\n * @param {String} value\n * @return {String}\n */\nfunction onIgnoreTagAttr(tag, name, value) {\n // do nothing\n}\n\n/**\n * default escapeHtml function\n *\n * @param {String} html\n */\nfunction escapeHtml(html) {\n return html.replace(REGEXP_LT, \"<\").replace(REGEXP_GT, \">\");\n}\n\n/**\n * default safeAttrValue function\n *\n * @param {String} tag\n * @param {String} name\n * @param {String} value\n * @param {Object} cssFilter\n * @return {String}\n */\nfunction safeAttrValue(tag, name, value, cssFilter) {\n // unescape attribute value firstly\n value = friendlyAttrValue(value);\n\n if (name === \"href\" || name === \"src\") {\n // filter `href` and `src` attribute\n // only allow the value that starts with `http://` | `https://` | `mailto:` | `/` | `#`\n value = _.trim(value);\n if (value === \"#\") return \"#\";\n if (\n !(\n value.substr(0, 7) === \"http://\" ||\n value.substr(0, 8) === \"https://\" ||\n value.substr(0, 7) === \"mailto:\" ||\n value.substr(0, 4) === \"tel:\" ||\n value.substr(0, 11) === \"data:image/\" ||\n value.substr(0, 6) === \"ftp://\" ||\n value.substr(0, 2) === \"./\" ||\n value.substr(0, 3) === \"../\" ||\n value[0] === \"#\" ||\n value[0] === \"/\"\n )\n ) {\n return \"\";\n }\n } else if (name === \"background\") {\n // filter `background` attribute (maybe no use)\n // `javascript:`\n REGEXP_DEFAULT_ON_TAG_ATTR_4.lastIndex = 0;\n if (REGEXP_DEFAULT_ON_TAG_ATTR_4.test(value)) {\n return \"\";\n }\n } else if (name === \"style\") {\n // `expression()`\n REGEXP_DEFAULT_ON_TAG_ATTR_7.lastIndex = 0;\n if (REGEXP_DEFAULT_ON_TAG_ATTR_7.test(value)) {\n return \"\";\n }\n // `url()`\n REGEXP_DEFAULT_ON_TAG_ATTR_8.lastIndex = 0;\n if (REGEXP_DEFAULT_ON_TAG_ATTR_8.test(value)) {\n REGEXP_DEFAULT_ON_TAG_ATTR_4.lastIndex = 0;\n if (REGEXP_DEFAULT_ON_TAG_ATTR_4.test(value)) {\n return \"\";\n }\n }\n if (cssFilter !== false) {\n cssFilter = cssFilter || defaultCSSFilter;\n value = cssFilter.process(value);\n }\n }\n\n // escape `<>\"` before returns\n value = escapeAttrValue(value);\n return value;\n}\n\n// RegExp list\nvar REGEXP_LT = //g;\nvar REGEXP_QUOTE = /\"/g;\nvar REGEXP_QUOTE_2 = /"/g;\nvar REGEXP_ATTR_VALUE_1 = /&#([a-zA-Z0-9]*);?/gim;\nvar REGEXP_ATTR_VALUE_COLON = /:?/gim;\nvar REGEXP_ATTR_VALUE_NEWLINE = /&newline;?/gim;\nvar REGEXP_DEFAULT_ON_TAG_ATTR_3 = /\\/\\*|\\*\\//gm;\nvar REGEXP_DEFAULT_ON_TAG_ATTR_4 = /((j\\s*a\\s*v\\s*a|v\\s*b|l\\s*i\\s*v\\s*e)\\s*s\\s*c\\s*r\\s*i\\s*p\\s*t\\s*|m\\s*o\\s*c\\s*h\\s*a)\\:/gi;\nvar REGEXP_DEFAULT_ON_TAG_ATTR_5 = /^[\\s\"'`]*(d\\s*a\\s*t\\s*a\\s*)\\:/gi;\nvar REGEXP_DEFAULT_ON_TAG_ATTR_6 = /^[\\s\"'`]*(d\\s*a\\s*t\\s*a\\s*)\\:\\s*image\\//gi;\nvar REGEXP_DEFAULT_ON_TAG_ATTR_7 = /e\\s*x\\s*p\\s*r\\s*e\\s*s\\s*s\\s*i\\s*o\\s*n\\s*\\(.*/gi;\nvar REGEXP_DEFAULT_ON_TAG_ATTR_8 = /u\\s*r\\s*l\\s*\\(.*/gi;\n\n/**\n * escape doube quote\n *\n * @param {String} str\n * @return {String} str\n */\nfunction escapeQuote(str) {\n return str.replace(REGEXP_QUOTE, \""\");\n}\n\n/**\n * unescape double quote\n *\n * @param {String} str\n * @return {String} str\n */\nfunction unescapeQuote(str) {\n return str.replace(REGEXP_QUOTE_2, '\"');\n}\n\n/**\n * escape html entities\n *\n * @param {String} str\n * @return {String}\n */\nfunction escapeHtmlEntities(str) {\n return str.replace(REGEXP_ATTR_VALUE_1, function replaceUnicode(str, code) {\n return code[0] === \"x\" || code[0] === \"X\"\n ? String.fromCharCode(parseInt(code.substr(1), 16))\n : String.fromCharCode(parseInt(code, 10));\n });\n}\n\n/**\n * escape html5 new danger entities\n *\n * @param {String} str\n * @return {String}\n */\nfunction escapeDangerHtml5Entities(str) {\n return str\n .replace(REGEXP_ATTR_VALUE_COLON, \":\")\n .replace(REGEXP_ATTR_VALUE_NEWLINE, \" \");\n}\n\n/**\n * clear nonprintable characters\n *\n * @param {String} str\n * @return {String}\n */\nfunction clearNonPrintableCharacter(str) {\n var str2 = \"\";\n for (var i = 0, len = str.length; i < len; i++) {\n str2 += str.charCodeAt(i) < 32 ? \" \" : str.charAt(i);\n }\n return _.trim(str2);\n}\n\n/**\n * get friendly attribute value\n *\n * @param {String} str\n * @return {String}\n */\nfunction friendlyAttrValue(str) {\n str = unescapeQuote(str);\n str = escapeHtmlEntities(str);\n str = escapeDangerHtml5Entities(str);\n str = clearNonPrintableCharacter(str);\n return str;\n}\n\n/**\n * unescape attribute value\n *\n * @param {String} str\n * @return {String}\n */\nfunction escapeAttrValue(str) {\n str = escapeQuote(str);\n str = escapeHtml(str);\n return str;\n}\n\n/**\n * `onIgnoreTag` function for removing all the tags that are not in whitelist\n */\nfunction onIgnoreTagStripAll() {\n return \"\";\n}\n\n/**\n * remove tag body\n * specify a `tags` list, if the tag is not in the `tags` list then process by the specify function (optional)\n *\n * @param {array} tags\n * @param {function} next\n */\nfunction StripTagBody(tags, next) {\n if (typeof next !== \"function\") {\n next = function() {};\n }\n\n var isRemoveAllTag = !Array.isArray(tags);\n function isRemoveTag(tag) {\n if (isRemoveAllTag) return true;\n return _.indexOf(tags, tag) !== -1;\n }\n\n var removeList = [];\n var posStart = false;\n\n return {\n onIgnoreTag: function(tag, html, options) {\n if (isRemoveTag(tag)) {\n if (options.isClosing) {\n var ret = \"[/removed]\";\n var end = options.position + ret.length;\n removeList.push([\n posStart !== false ? posStart : options.position,\n end\n ]);\n posStart = false;\n return ret;\n } else {\n if (!posStart) {\n posStart = options.position;\n }\n return \"[removed]\";\n }\n } else {\n return next(tag, html, options);\n }\n },\n remove: function(html) {\n var rethtml = \"\";\n var lastPos = 0;\n _.forEach(removeList, function(pos) {\n rethtml += html.slice(lastPos, pos[0]);\n lastPos = pos[1];\n });\n rethtml += html.slice(lastPos);\n return rethtml;\n }\n };\n}\n\n/**\n * remove html comments\n *\n * @param {String} html\n * @return {String}\n */\nfunction stripCommentTag(html) {\n return html.replace(STRIP_COMMENT_TAG_REGEXP, \"\");\n}\nvar STRIP_COMMENT_TAG_REGEXP = //g;\n\n/**\n * remove invisible characters\n *\n * @param {String} html\n * @return {String}\n */\nfunction stripBlankChar(html) {\n var chars = html.split(\"\");\n chars = chars.filter(function(char) {\n var c = char.charCodeAt(0);\n if (c === 127) return false;\n if (c <= 31) {\n if (c === 10 || c === 13) return true;\n return false;\n }\n return true;\n });\n return chars.join(\"\");\n}\n\nexports.whiteList = getDefaultWhiteList();\nexports.getDefaultWhiteList = getDefaultWhiteList;\nexports.onTag = onTag;\nexports.onIgnoreTag = onIgnoreTag;\nexports.onTagAttr = onTagAttr;\nexports.onIgnoreTagAttr = onIgnoreTagAttr;\nexports.safeAttrValue = safeAttrValue;\nexports.escapeHtml = escapeHtml;\nexports.escapeQuote = escapeQuote;\nexports.unescapeQuote = unescapeQuote;\nexports.escapeHtmlEntities = escapeHtmlEntities;\nexports.escapeDangerHtml5Entities = escapeDangerHtml5Entities;\nexports.clearNonPrintableCharacter = clearNonPrintableCharacter;\nexports.friendlyAttrValue = friendlyAttrValue;\nexports.escapeAttrValue = escapeAttrValue;\nexports.onIgnoreTagStripAll = onIgnoreTagStripAll;\nexports.StripTagBody = StripTagBody;\nexports.stripCommentTag = stripCommentTag;\nexports.stripBlankChar = stripBlankChar;\nexports.cssFilter = defaultCSSFilter;\nexports.getDefaultCSSWhiteList = getDefaultCSSWhiteList;\n"],"sourceRoot":""}