1 | /*!
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2 | * Copyright (c) 2015, Salesforce.com, Inc.
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions are met:
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7 | *
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8 | * 1. Redistributions of source code must retain the above copyright notice,
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9 | * this list of conditions and the following disclaimer.
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10 | *
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11 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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12 | * this list of conditions and the following disclaimer in the documentation
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13 | * and/or other materials provided with the distribution.
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14 | *
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15 | * 3. Neither the name of Salesforce.com nor the names of its contributors may
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16 | * be used to endorse or promote products derived from this software without
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17 | * specific prior written permission.
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18 | *
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19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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29 | * POSSIBILITY OF SUCH DAMAGE.
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30 | */
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31 | ;
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32 | const pubsuffix = require("./pubsuffix-psl");
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33 |
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34 | // Gives the permutation of all possible domainMatch()es of a given domain. The
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35 | // array is in shortest-to-longest order. Handy for indexing.
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36 | const SPECIAL_USE_DOMAINS = ["local"]; // RFC 6761
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37 | function permuteDomain(domain, allowSpecialUseDomain) {
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38 | let pubSuf = null;
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39 | if (allowSpecialUseDomain) {
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40 | const domainParts = domain.split(".");
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41 | if (SPECIAL_USE_DOMAINS.includes(domainParts[domainParts.length - 1])) {
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42 | pubSuf = `${domainParts[domainParts.length - 2]}.${
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43 | domainParts[domainParts.length - 1]
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44 | }`;
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45 | } else {
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46 | pubSuf = pubsuffix.getPublicSuffix(domain);
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47 | }
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48 | } else {
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49 | pubSuf = pubsuffix.getPublicSuffix(domain);
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50 | }
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51 |
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52 | if (!pubSuf) {
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53 | return null;
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54 | }
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55 | if (pubSuf == domain) {
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56 | return [domain];
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57 | }
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58 |
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59 | const prefix = domain.slice(0, -(pubSuf.length + 1)); // ".example.com"
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60 | const parts = prefix.split(".").reverse();
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61 | let cur = pubSuf;
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62 | const permutations = [cur];
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63 | while (parts.length) {
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64 | cur = `${parts.shift()}.${cur}`;
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65 | permutations.push(cur);
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66 | }
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67 | return permutations;
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68 | }
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69 |
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70 | exports.permuteDomain = permuteDomain;
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