1/*! 2 * Copyright (c) 2015, Salesforce.com, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * 3. Neither the name of Salesforce.com nor the names of its contributors may 16 * be used to endorse or promote products derived from this software without 17 * specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31"use strict"; 32var pubsuffix = require('./pubsuffix-psl'); 33 34// Gives the permutation of all possible domainMatch()es of a given domain. The 35// array is in shortest-to-longest order. Handy for indexing. 36function permuteDomain (domain) { 37 var pubSuf = pubsuffix.getPublicSuffix(domain); 38 if (!pubSuf) { 39 return null; 40 } 41 if (pubSuf == domain) { 42 return [domain]; 43 } 44 45 var prefix = domain.slice(0, -(pubSuf.length + 1)); // ".example.com" 46 var parts = prefix.split('.').reverse(); 47 var cur = pubSuf; 48 var permutations = [cur]; 49 while (parts.length) { 50 cur = parts.shift() + '.' + cur; 51 permutations.push(cur); 52 } 53 return permutations; 54} 55 56exports.permuteDomain = permuteDomain; 57