92 lines
2.5 KiB
JavaScript
92 lines
2.5 KiB
JavaScript
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/**
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* @fileoverview Prevent usage of `javascript:` URLs
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* @author Sergei Startsev
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*/
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'use strict';
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const docsUrl = require('../util/docsUrl');
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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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// https://github.com/facebook/react/blob/d0ebde77f6d1232cefc0da184d731943d78e86f2/packages/react-dom/src/shared/sanitizeURL.js#L30
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/* eslint-disable-next-line max-len, no-control-regex */
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const isJavaScriptProtocol = /^[\u0000-\u001F ]*j[\r\n\t]*a[\r\n\t]*v[\r\n\t]*a[\r\n\t]*s[\r\n\t]*c[\r\n\t]*r[\r\n\t]*i[\r\n\t]*p[\r\n\t]*t[\r\n\t]*:/i;
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function hasJavaScriptProtocol(attr) {
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return attr.value.type === 'Literal' &&
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isJavaScriptProtocol.test(attr.value.value);
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}
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function shouldVerifyElement(node, config) {
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const name = node.name && node.name.name;
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return name === 'a' || config.find(i => i.name === name);
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}
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function shouldVerifyProp(node, config) {
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const name = node.name && node.name.name;
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const parentName = node.parent.name && node.parent.name.name;
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if (parentName === 'a' && name === 'href') {
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return true;
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}
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const el = config.find(i => i.name === parentName);
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if (!el) {
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return false;
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}
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const props = el.props || [];
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return node.name && props.indexOf(name) !== -1;
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}
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module.exports = {
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meta: {
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docs: {
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description: 'Forbid `javascript:` URLs',
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category: 'Best Practices',
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recommended: false,
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url: docsUrl('jsx-no-script-url')
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},
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schema: [{
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type: 'array',
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uniqueItems: true,
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items: {
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type: 'object',
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properties: {
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name: {
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type: 'string'
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},
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props: {
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type: 'array',
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items: {
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type: 'string',
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uniqueItems: true
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}
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}
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},
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required: ['name', 'props'],
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additionalProperties: false
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}
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}]
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},
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create(context) {
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const config = context.options[0] || [];
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return {
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JSXAttribute(node) {
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const parent = node.parent;
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if (shouldVerifyElement(parent, config) && shouldVerifyProp(node, config) && hasJavaScriptProtocol(node)) {
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context.report({
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node,
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message: 'A future version of React will block javascript: URLs as a security precaution. ' +
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'Use event handlers instead if you can. If you need to generate unsafe HTML, try using dangerouslySetInnerHTML instead.'
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});
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}
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}
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};
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}
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};
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