Issue 5146 - Implement DownloadableSubscription parsing in C++

lib/synchronizer.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 139 matching lines @@
     if (!headerMatch)
       return errorCallback("synchronize_invalid_data");
     let minVersion = headerMatch[1];
 
     let parser = DownloadableSubscription.parseDownload();
 
     // Process filters
     for (let line of lines)
       parser.process(line);
 
-    if (!parser.verifyChecksum())
-      return errorCallback("synchronize_checksum_mismatch");
-
     if (parser.redirect)
     {
       let {redirect} = parser;
       parser.delete();
       return redirectCallback(redirect);
     }
 
     // Handle redirects
     let subscription = Subscription.fromURL(downloadable.redirectURL ||
                                             downloadable.url);
@@ skipping 120 matching lines @@
               Array.from(subscription.filters, f => f.text).join("\n");
             redirectCallback("data:text/plain," + encodeURIComponent(data));
           }
         }, false);
         request.send(null);
       }
     }
   }
 };
 Synchronizer.init();