53 lines
1.4 KiB
JavaScript
53 lines
1.4 KiB
JavaScript
import { sanitize as dompurifySanitize, addHook } from 'dompurify';
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import { getBaseURL, relativePathToAbsolute } from '~/lib/utils/url_utility';
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// Safely allow SVG <use> tags
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const defaultConfig = {
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ADD_TAGS: ['use'],
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};
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// Only icons urls from `gon` are allowed
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const getAllowedIconUrls = (gon = window.gon) =>
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[gon.sprite_file_icons, gon.sprite_icons].filter(Boolean);
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const isUrlAllowed = url => getAllowedIconUrls().some(allowedUrl => url.startsWith(allowedUrl));
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const isHrefSafe = url =>
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isUrlAllowed(url) || isUrlAllowed(relativePathToAbsolute(url, getBaseURL()));
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const removeUnsafeHref = (node, attr) => {
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if (!node.hasAttribute(attr)) {
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return;
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}
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if (!isHrefSafe(node.getAttribute(attr))) {
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node.removeAttribute(attr);
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}
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};
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/**
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* Sanitize icons' <use> tag attributes, to safely include
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* svgs such as in:
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*
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* <svg viewBox="0 0 100 100">
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* <use href="/assets/icons-xxx.svg#icon_name"></use>
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* </svg>
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*
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* @param {Object} node - Node to sanitize
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*/
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const sanitizeSvgIcon = node => {
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removeUnsafeHref(node, 'href');
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// Note: `xlink:href` is deprecated, but still in use
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// https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/xlink:href
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removeUnsafeHref(node, 'xlink:href');
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};
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addHook('afterSanitizeAttributes', node => {
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if (node.tagName.toLowerCase() === 'use') {
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sanitizeSvgIcon(node);
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}
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});
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export const sanitize = (val, config = defaultConfig) => dompurifySanitize(val, config);
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