src/de/steamwar/bungeecore/BungeeCore.java

@@ -25,6 +25,7 @@ import de.steamwar.bungeecore.listeners.*;
 import de.steamwar.bungeecore.listeners.mods.ModLoaderBlocker;
 import de.steamwar.bungeecore.listeners.mods.Forge;
 import de.steamwar.bungeecore.listeners.mods.LabyMod;
+import de.steamwar.bungeecore.listeners.mods.WorldDownloader;
 import de.steamwar.bungeecore.sql.SQL;
 import de.steamwar.bungeecore.sql.SteamwarUser;
 import de.steamwar.bungeecore.sql.Team;
@@ -85,6 +86,7 @@ public class BungeeCore extends Plugin {
         new BanListener();
         new CheckListener();
         new ModLoaderBlocker();
+        new WorldDownloader();
 
         commands.put("/b", null);
         commands.put("/gs", null);

src/de/steamwar/bungeecore/listeners/mods/WorldDownloader.java

@@ -0,0 +1,33 @@
+package de.steamwar.bungeecore.listeners.mods;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
+import de.steamwar.bungeecore.listeners.BasicListener;
+import de.steamwar.bungeecore.sql.Mod;
+import net.md_5.bungee.api.connection.Connection;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.event.PluginMessageEvent;
+import net.md_5.bungee.event.EventHandler;
+
+import java.util.Collections;
+import java.util.Set;
+
+public class WorldDownloader extends BasicListener {
+
+    private static final Set<String> wdlTags = Collections.unmodifiableSet(
+            Sets.newHashSet("WDL|INIT", "wdl:init", "WDL|REQUEST", "wdl:request")
+    );
+
+    @EventHandler
+    public void onPluginMessageEvent(PluginMessageEvent event){
+        if(!wdlTags.contains(event.getTag()))
+            return;
+
+        Connection sender = event.getSender();
+        if(!(sender instanceof ProxiedPlayer))
+            return;
+
+        event.setCancelled(true);
+        Utils.handleMods((ProxiedPlayer) sender, Lists.newArrayList(Mod.get("wdl", Mod.Platform.FORGE)));
+    }
+}