Issue 7260 - Internalize third-party request check in matcher

lib/domain.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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
@@ skipping 96 matching lines @@
     return hostname;
 
   return slices[cutoff];
 }
 
 exports.getDomain = getDomain;
 
 /**
  * Checks whether a request's origin is different from its document's origin.
  *
- * @param {URL} url The request URL.
+ * @param {URL|string} url The request URL.

[Sebastian Noack, 2019/02/05 04:32:53]

Do we even still need to support the case where an URL object is passed in?

[Manish Jethani, 2019/02/05 05:07:28]

Actually the default is a URL object now, which is created in
lib/requestBlocker.js in adblockpluschrome. It makes it all the way to here.

[Sebastian Noack, 2019/02/05 05:21:16]

So why did you add support for passing in strings then?

[Manish Jethani, 2019/02/05 05:42:23]

It's there for backwards compatibility with (1) libadblockplus, (2) unit tests,
(3) lib/popUpBlocker.js in adblockpluschrome.

Also I'd like to try to avoid trying to create a new URL object if possible
(hostname can be extracted using a regular expression), but that would be a
separate issue.

[Sebastian Noack, 2019/02/05 05:54:45]

I don't get it, you can just make the unit tsts create an URL object, I don't
see any code left in adblockpluschrome (after your related changes there) that
would still call isThirdParty(), and libadblockplus never used a version of
adblockpluscore that provided an isThirdParty() function, and if it did the code
needs to be changed anyway since the matcher no longer let's you pass in a
third-party value.

  * @param {string} documentHostname The IDNA-encoded hostname of the document.
  *
  * @returns {boolean}
  */
 function isThirdParty(url, documentHostname)
 {
-  let requestHostname = url.hostname;
+  let requestHostname = typeof url == "string" ? new URL(url).hostname :
+                          url.hostname;
 
   if (requestHostname[requestHostname.length - 1] == ".")
     requestHostname = requestHostname.replace(/\.+$/, "");
 
   if (documentHostname[documentHostname.length - 1] == ".")
     documentHostname = documentHostname.replace(/\.+$/, "");
 
   if (requestHostname == documentHostname)
     return false;
 
   if (!isDomain(requestHostname) || !isDomain(documentHostname))
     return true;
 
   return getDomain(requestHostname) != getDomain(documentHostname);
 }
 
 exports.isThirdParty = isThirdParty;