| "use strict"; |
| |
| const _ = require("lodash"); |
| const functionArgumentsSearch = require("../../utils/functionArgumentsSearch"); |
| const getSchemeFromUrl = require("../../utils/getSchemeFromUrl"); |
| const isStandardSyntaxUrl = require("../../utils/isStandardSyntaxUrl"); |
| const matchesStringOrRegExp = require("../../utils/matchesStringOrRegExp"); |
| const report = require("../../utils/report"); |
| const ruleMessages = require("../../utils/ruleMessages"); |
| const validateOptions = require("../../utils/validateOptions"); |
| |
| const ruleName = "function-url-scheme-whitelist"; |
| |
| const messages = ruleMessages(ruleName, { |
| rejected: scheme => `Unexpected URL scheme "${scheme}:"` |
| }); |
| |
| const rule = function(whitelist) { |
| return (root, result) => { |
| const validOptions = validateOptions(result, ruleName, { |
| actual: whitelist, |
| possible: [_.isString, _.isRegExp] |
| }); |
| |
| if (!validOptions) { |
| return; |
| } |
| |
| root.walkDecls(function(decl) { |
| functionArgumentsSearch( |
| decl.toString().toLowerCase(), |
| "url", |
| (args, index) => { |
| const unspacedUrlString = _.trim(args, " "); |
| |
| if (!isStandardSyntaxUrl(unspacedUrlString)) { |
| return; |
| } |
| |
| const urlString = _.trim(unspacedUrlString, "'\""); |
| const scheme = getSchemeFromUrl(urlString); |
| |
| if (scheme === null) { |
| return; |
| } |
| |
| if (matchesStringOrRegExp(scheme, whitelist)) { |
| return; |
| } |
| |
| report({ |
| message: messages.rejected(scheme), |
| node: decl, |
| index, |
| result, |
| ruleName |
| }); |
| } |
| ); |
| }); |
| }; |
| }; |
| |
| rule.primaryOptionArray = true; |
| |
| rule.ruleName = ruleName; |
| rule.messages = messages; |
| module.exports = rule; |