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-rw-r--r--vendor/twbs/bootstrap/js/src/tools/sanitizer.js127
1 files changed, 127 insertions, 0 deletions
diff --git a/vendor/twbs/bootstrap/js/src/tools/sanitizer.js b/vendor/twbs/bootstrap/js/src/tools/sanitizer.js
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+++ b/vendor/twbs/bootstrap/js/src/tools/sanitizer.js
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+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.3.1): tools/sanitizer.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+const uriAttrs = [
+ 'background',
+ 'cite',
+ 'href',
+ 'itemtype',
+ 'longdesc',
+ 'poster',
+ 'src',
+ 'xlink:href'
+]
+
+const ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i
+
+export const DefaultWhitelist = {
+ // Global attributes allowed on any supplied element below.
+ '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],
+ a: ['target', 'href', 'title', 'rel'],
+ area: [],
+ b: [],
+ br: [],
+ col: [],
+ code: [],
+ div: [],
+ em: [],
+ hr: [],
+ h1: [],
+ h2: [],
+ h3: [],
+ h4: [],
+ h5: [],
+ h6: [],
+ i: [],
+ img: ['src', 'alt', 'title', 'width', 'height'],
+ li: [],
+ ol: [],
+ p: [],
+ pre: [],
+ s: [],
+ small: [],
+ span: [],
+ sub: [],
+ sup: [],
+ strong: [],
+ u: [],
+ ul: []
+}
+
+/**
+ * A pattern that recognizes a commonly useful subset of URLs that are safe.
+ *
+ * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+ */
+const SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file):|[^&:/?#]*(?:[/?#]|$))/gi
+
+/**
+ * A pattern that matches safe data URLs. Only matches image, video and audio types.
+ *
+ * Shoutout to Angular 7 https://github.com/angular/angular/blob/7.2.4/packages/core/src/sanitization/url_sanitizer.ts
+ */
+const DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[a-z0-9+/]+=*$/i
+
+function allowedAttribute(attr, allowedAttributeList) {
+ const attrName = attr.nodeName.toLowerCase()
+
+ if (allowedAttributeList.indexOf(attrName) !== -1) {
+ if (uriAttrs.indexOf(attrName) !== -1) {
+ return Boolean(attr.nodeValue.match(SAFE_URL_PATTERN) || attr.nodeValue.match(DATA_URL_PATTERN))
+ }
+
+ return true
+ }
+
+ const regExp = allowedAttributeList.filter((attrRegex) => attrRegex instanceof RegExp)
+
+ // Check if a regular expression validates the attribute.
+ for (let i = 0, l = regExp.length; i < l; i++) {
+ if (attrName.match(regExp[i])) {
+ return true
+ }
+ }
+
+ return false
+}
+
+export function sanitizeHtml(unsafeHtml, whiteList, sanitizeFn) {
+ if (unsafeHtml.length === 0) {
+ return unsafeHtml
+ }
+
+ if (sanitizeFn && typeof sanitizeFn === 'function') {
+ return sanitizeFn(unsafeHtml)
+ }
+
+ const domParser = new window.DOMParser()
+ const createdDocument = domParser.parseFromString(unsafeHtml, 'text/html')
+ const whitelistKeys = Object.keys(whiteList)
+ const elements = [].slice.call(createdDocument.body.querySelectorAll('*'))
+
+ for (let i = 0, len = elements.length; i < len; i++) {
+ const el = elements[i]
+ const elName = el.nodeName.toLowerCase()
+
+ if (whitelistKeys.indexOf(el.nodeName.toLowerCase()) === -1) {
+ el.parentNode.removeChild(el)
+
+ continue
+ }
+
+ const attributeList = [].slice.call(el.attributes)
+ const whitelistedAttributes = [].concat(whiteList['*'] || [], whiteList[elName] || [])
+
+ attributeList.forEach((attr) => {
+ if (!allowedAttribute(attr, whitelistedAttributes)) {
+ el.removeAttribute(attr.nodeName)
+ }
+ })
+ }
+
+ return createdDocument.body.innerHTML
+}