Issue 3687 - Add experimental support for Safari content blockers

lib/url.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /** @module url */
 
+let getDomain = require("tldjs").getDomain;
+let punycode = require("punycode");
+
 let getDecodedHostname =
 /**
  * Gets the IDN-decoded hostname from a URL object.
  *
  * @param {URL} url
  * @return {string}
  * @static
  */
 exports.getDecodedHostname = function(url)
 {
@@ skipping 55 matching lines @@
 {
   // No hostname or IPv4 address, also considering hexadecimal octets.
   if (/^((0x[\da-f]+|\d+)(\.|$))*$/i.test(hostname))
     return false;
 
   // IPv6 address. Since there can't be colons in domains, we can
   // just check whether there are any colons to exclude IPv6 addresses.
   return hostname.indexOf(":") == -1;
 }
 
-function getBaseDomain(hostname)
-{
-  let bits = hostname.split(".");
-  let cutoff = bits.length - 2;
-
-  for (let i = 0; i < bits.length; i++)
-  {
-    let offset = publicSuffixes[bits.slice(i).join(".")];
-
-    if (typeof offset != "undefined")
-    {
-      cutoff = i - offset;
-      break;
-    }
-  }
-
-  if (cutoff <= 0)
-    return hostname;
-
-  return bits.slice(cutoff).join(".");
-}
-
 /**
  * Checks whether the request's origin is different from the document's origin.
  *
  * @param {URL}    url           The request URL
  * @param {string} documentHost  The IDN-decoded hostname of the document
  * @return {Boolean}
  */
 exports.isThirdParty = function(url, documentHost)
 {
   let requestHost = getDecodedHostname(url).replace(/\.+$/, "");
   documentHost = documentHost.replace(/\.+$/, "");
 
   if (requestHost == documentHost)
     return false;
 
   if (!isDomain(requestHost) || !isDomain(documentHost))
     return true;
 
-  return getBaseDomain(requestHost) != getBaseDomain(documentHost);
+  return getDomain(requestHost) != getDomain(documentHost);
 };