PacketNova.java

package org.midnightas.novarp;

import io.netty.buffer.ByteBuf;
import net.minecraft.client.Minecraft;
import net.minecraft.util.IThreadListener;
import net.minecraft.world.WorldServer;
import net.minecraftforge.fml.common.network.ByteBufUtils;
import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;

public class PacketNova implements IMessage {

    public String text;

    public PacketNova(String s) {
        this.text = s;
    }

    @Override
    public void fromBytes(ByteBuf bb) {
        text = ByteBufUtils.readUTF8String(bb);
    }

    @Override
    public void toBytes(ByteBuf bb) {
        ByteBufUtils.writeUTF8String(bb, text);
    }

    public static class Handler implements IMessageHandler {

        @Override
        public IMessage onMessage(final IMessage arg0, MessageContext arg1) {
            IThreadListener mainThread = (WorldServer) Minecraft.getMinecraft().thePlayer.worldObj;
            mainThread.addScheduledTask(new Runnable() {
                @Override
                public void run() {
                    if (arg0 instanceof PacketNova) {
                        String text = ((PacketNova) arg0).text;
                        if (text.startsWith("playurl:")) {
                            String url = text.substring(8);

                        }
                    }
                }
            });
            return null;
        }

    }

}