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permuteDomain.js
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/*! * Copyright (c) 2015, Salesforce.com, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. Neither the name of Salesforce.com nor the names of its contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ "use strict"; var pubsuffix = require('./pubsuffix-psl'); // Gives the permutation of all possible domainMatch()es of a given domain. The // array is in shortest-to-longest order. Handy for indexing. function permuteDomain (domain) { var pubSuf = pubsuffix.getPublicSuffix(domain); if (!pubSuf) { return null; } if (pubSuf == domain) { return [domain]; } var prefix = domain.slice(0, -(pubSuf.length + 1)); // ".example.com" var parts = prefix.split('.').reverse(); var cur = pubSuf; var permutations = [cur]; while (parts.length) { cur = parts.shift() + '.' + cur; permutations.push(cur); } return permutations; } exports.permuteDomain = permuteDomain;