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JavaScript

/*!
* Copyright (c) 2018, 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";
const psl = require("psl");
// RFC 6761
const SPECIAL_USE_DOMAINS = [
"local",
"example",
"invalid",
"localhost",
"test"
];
const SPECIAL_TREATMENT_DOMAINS = ["localhost", "invalid"];
function getPublicSuffix(domain, options = {}) {
const domainParts = domain.split(".");
const topLevelDomain = domainParts[domainParts.length - 1];
const allowSpecialUseDomain = !!options.allowSpecialUseDomain;
const ignoreError = !!options.ignoreError;
if (allowSpecialUseDomain && SPECIAL_USE_DOMAINS.includes(topLevelDomain)) {
if (domainParts.length > 1) {
const secondLevelDomain = domainParts[domainParts.length - 2];
// In aforementioned example, the eTLD/pubSuf will be apple.localhost
return `${secondLevelDomain}.${topLevelDomain}`;
} else if (SPECIAL_TREATMENT_DOMAINS.includes(topLevelDomain)) {
// For a single word special use domain, e.g. 'localhost' or 'invalid', per RFC 6761,
// "Application software MAY recognize {localhost/invalid} names as special, or
// MAY pass them to name resolution APIs as they would for other domain names."
return `${topLevelDomain}`;
}
}
if (!ignoreError && SPECIAL_USE_DOMAINS.includes(topLevelDomain)) {
throw new Error(
`Cookie has domain set to the public suffix "${topLevelDomain}" which is a special use domain. To allow this, configure your CookieJar with {allowSpecialUseDomain:true, rejectPublicSuffixes: false}.`
);
}
return psl.get(domain);
}
exports.getPublicSuffix = getPublicSuffix;