Issue 1727 - Prevent circumvention via WebSocket

lib/requestBlocker.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
@@ skipping 128 matching lines @@
 
   ignoreFilterNotifications = true;
   setTimeout(() =>
   {
     ignoreFilterNotifications = false;
     ext.webRequest.handlerBehaviorChanged();
     FilterNotifier.emit("filter.behaviorChanged");
   });
 }
 
-FilterNotifier.on("subscription.added", onFilterChange)
+FilterNotifier.on("subscription.added", onFilterChange);
 FilterNotifier.on("subscription.removed", onFilterChange);
 FilterNotifier.on("subscription.updated", onFilterChange);
 FilterNotifier.on("subscription.disabled", arg => onFilterChange(arg, true));
 FilterNotifier.on("filter.added", onFilterChange);
 FilterNotifier.on("filter.removed", onFilterChange);
 FilterNotifier.on("filter.disabled", arg => onFilterChange(arg, true));
 FilterNotifier.on("load", onFilterChange);
+
+port.on("websocket-request", function(msg, sender)
+{
+  var results = ext.webRequest.onBeforeRequest._dispatch(
+    new URL(msg.url),
+    "OTHER",
+    sender.page,
+    sender.frame
+  );
+  return results.indexOf(false) != -1;
+});