[SOLVED][1.6.2] Packet not sending itemstack nttagcompound.

mr_crayfish · July 13, 2013

Hello! Some of you may know me for creating a furniture mod called "MrCrayfish's Furniture Mod" but that is besides the point. I am very new to packets and handling them. So far I wrote a code that you would think would seem to work. I am sending an itemstack through a packet. I have taken a look how the book does it, copied the code and just modified to suit mine. The problem is that it doesn't send the NBTTagCompound when I'm on a server or LAN. If anyone could help me out to solve this, I will thank you a lot!

Here is all the code associated.

GuiEnvelope

Only the nesssary code is here

@Override
protected void actionPerformed(GuiButton guibutton) 
{
	if(!guibutton.enabled) 
	{
		return;
	}
	if(guibutton.id == 0)
	{
		if(player.getCurrentEquippedItem() != null)
		{
			ItemStack mail = player.getCurrentEquippedItem();
			mail.setTagInfo("author", new NBTTagString("author", this.player.getCommandSenderName()));
			mail.setTagInfo("signed", new NBTTagString("signed", "true"));
			mail.itemID = MrCrayfishFurnitureMod.itemEnvelopeSigned.itemID;
			this.sendItemStackToServer(mail);
			this.mc.displayGuiScreen(null);
		}
	}

}

protected void sendItemStackToServer(ItemStack mail) 
{
	//Sending packet
	ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream();
	DataOutputStream dataoutputstream = new DataOutputStream(bytearrayoutputstream);

	NBTTagCompound nbt = NBTHelper.getCompoundTag(mail, "Envelope");
	if(nbt != null)
	{
		if(nbt.getTagList("Items").tagCount() > 0)
		{
			System.out.println("[sENDING]Has contents");
		}
	}

	try
	{
		PacketManager.writeItemStack(mail, dataoutputstream);
	}
	catch (Exception exception)
	{
		exception.printStackTrace();
	}

	Packet250CustomPayload packet = new Packet250CustomPayload();
	packet.channel = "envelope";
	packet.data = bytearrayoutputstream.toByteArray();
	packet.length = bytearrayoutputstream.size();
	PacketDispatcher.sendPacketToServer(packet);
}

PacketManager

package com.mrcrayfish.furniture;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.IOException;

import com.google.common.io.ByteArrayDataInput;
import com.google.common.io.ByteStreams;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.CompressedStreamTools;
import net.minecraft.nbt.NBTBase;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.network.INetworkManager;
import net.minecraft.network.packet.Packet;
import net.minecraft.network.packet.Packet250CustomPayload;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;
import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.network.IPacketHandler;
import cpw.mods.fml.common.network.PacketDispatcher;
import cpw.mods.fml.common.network.Player;

import net.minecraft.entity.*;

public class PacketManager implements IPacketHandler
{
@Override
public void onPacketData(INetworkManager manager, Packet250CustomPayload packet, Player player)
{
	DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(packet.data));

	if(packet.channel.equals("envelope"))
	{
		handlePacket(inputStream, (EntityPlayerMP) player, 0);
	}
	if(packet.channel.equals("package"))
	{
		handlePacket(inputStream, (EntityPlayerMP) player, 1);
	}
}

private void handlePacket(DataInputStream inputStream, EntityPlayerMP player, int id) 
{
	System.out.println(player.username);
	if(id == 0)
	{
		try 
		{
			ItemStack itemstack = readItemStack(inputStream);
			NBTTagCompound nbt = NBTHelper.getCompoundTag(itemstack, "Envelope");
			if(nbt != null)
			{
				if(nbt.getTagList("Items") != null)
				{
					System.out.println("Has contents");
				}
			}
			player.setCurrentItemOrArmor(0, itemstack);
		} 
		catch (IOException e) 
		{
			e.printStackTrace();
		}
	}

	/*if(id == 1)
	{
		String author = "ERROR";
		try 
		{
			author = inputStream.readUTF();
		} 
		catch (IOException e) 
		{
			e.printStackTrace();
		}
		if(player.getCurrentEquippedItem() != null)
		{
			ItemStack mail = player.getCurrentEquippedItem();
			NBTTagCompound nbt = NBTHelper.getCompoundTag(mail, "Envelope");
			if(nbt == null)
			{
				System.out.println("Doesn't have contents");
			}
		}
	}*/
}

public static ItemStack readItemStack(DataInput par0DataInput) throws IOException
{
	ItemStack itemstack = null;
	short short1 = par0DataInput.readShort();
	System.out.println("[RECIEVING]itemstack id: " + short1);

	if (short1 >= 0)
	{
		byte b0 = par0DataInput.readByte();
		short short2 = par0DataInput.readShort();
		itemstack = new ItemStack(short1, b0, short2);
		itemstack.stackTagCompound = readNBTTagCompound(par0DataInput);

		System.out.println("[RECIEVING]itemstack stacksize: " + b0);
		System.out.println("[RECIEVING]itemstack damage: " + short2);

	}

	return itemstack;
}

public static NBTTagCompound readNBTTagCompound(DataInput par0DataInput) throws IOException
{
	short short1 = par0DataInput.readShort();
	System.out.println("[RECIEVING]abyte length: " + short1);

	if (short1 < 0)
	{
		return null;
	}
	else
	{
		byte[] abyte = new byte[short1];
		par0DataInput.readFully(abyte);
		return CompressedStreamTools.decompress(abyte);
	}
}

public static void writeItemStack(ItemStack par0ItemStack, DataOutput par1DataOutput) throws IOException
{
	if (par0ItemStack == null)
	{
		par1DataOutput.writeShort(-1);
	}
	else
	{			
		par1DataOutput.writeShort(par0ItemStack.itemID);
		par1DataOutput.writeByte(par0ItemStack.stackSize);
		par1DataOutput.writeShort(par0ItemStack.getItemDamage());
		NBTTagCompound nbttagcompound = null;

		if (par0ItemStack.getItem().isDamageable() || par0ItemStack.getItem().getShareTag())
		{
			nbttagcompound = par0ItemStack.stackTagCompound;
		}

		writeNBTTagCompound(nbttagcompound, par1DataOutput);

		System.out.println("[sENDING]itemstack id: " + par0ItemStack.itemID);
		System.out.println("[sENDING]itemstack stacksize: " + par0ItemStack.stackSize);
		System.out.println("[sENDING]itemstack damage: " + par0ItemStack.getItemDamage());
	}
}

protected static void writeNBTTagCompound(NBTTagCompound par0NBTTagCompound, DataOutput par1DataOutput) throws IOException
{
	if (par0NBTTagCompound == null)
	{
		par1DataOutput.writeShort(-1);
	}
	else
	{
		byte[] abyte = CompressedStreamTools.compress(par0NBTTagCompound);
		par1DataOutput.writeShort((short)abyte.length);
		par1DataOutput.write(abyte);

		System.out.println("[sENDING]abyte length: " + (short)abyte.length);
		System.out.println("[sENDING]abyte: " + abyte);
	}
}
}

ItemEnvelope'

package com.mrcrayfish.furniture;

import java.util.List;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

import net.minecraft.client.renderer.texture.IconRegister;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.nbt.NBTTagString;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumChatFormatting;
import net.minecraft.util.StatCollector;
import net.minecraft.world.World;

public class ItemEnvelope extends Item implements IMail
{	
public ItemEnvelope(int par1) 
{
	super(par1);
	this.maxStackSize = 1;
}

@Override
public boolean getShareTag()
    {
        return false;
    }

public boolean onItemUse(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, World par3World, int par4, int par5, int par6, int par7, float par8, float par9, float par10)
{
	TileEntity tile_entity = par3World.getBlockTileEntity(par4, par5, par6);
	if(!par3World.isRemote)
	{
		if(par2EntityPlayer.capabilities.isCreativeMode && par2EntityPlayer.isSneaking())
		{
			par2EntityPlayer.addChatMessage("You cannot use this in creative.");
		}
		else if(tile_entity instanceof TileEntityMailBox)
		{
			TileEntityMailBox tileEntityMailBox = (TileEntityMailBox)tile_entity;
			if(par2EntityPlayer.isSneaking() && !par3World.isRemote)
			{
				par2EntityPlayer.addChatMessage("You must sign the envelope before depositing it.");
			}
		}
	}
	return true;    
}

public ItemStack onItemRightClick(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer)
{
	if(!par2World.isRemote)
	{
		par3EntityPlayer.openGui(MrCrayfishFurnitureMod.instance, 5, par2World, 0, 0, 0);
	}
	return par1ItemStack;
}

public static IInventory getInv(EntityPlayer par1EntityPlayer) 
{
	ItemStack mail = par1EntityPlayer.getCurrentEquippedItem();
	InventoryEnvelope invMail = null;
	if(mail != null && mail.getItem() instanceof ItemEnvelope)
	{
		invMail = new InventoryEnvelope(par1EntityPlayer, mail);
	}
	return invMail;
}

public void registerIcons(IconRegister par1IconRegister)
    {
	this.itemIcon = par1IconRegister.registerIcon("cfm:itemenvelope");
    }
}

ItemEnvelopeSigned'

package com.mrcrayfish.furniture;

import java.util.List;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

import net.minecraft.client.renderer.texture.IconRegister;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.nbt.NBTTagString;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumChatFormatting;
import net.minecraft.util.StatCollector;
import net.minecraft.world.World;

public class ItemEnvelopeSigned extends Item implements IMail
{
public static boolean canUse;

public ItemEnvelopeSigned(int par1) 
{
	super(par1);
	this.maxStackSize = 1;
}

@Override
public boolean getShareTag()
    {
        return true;
    }

public void addInformation(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, List par3List, boolean par4)
    {
        if (par1ItemStack.hasTagCompound())
        {
            NBTTagCompound nbttagcompound = par1ItemStack.getTagCompound();
            NBTTagString nbttagstring = (NBTTagString)nbttagcompound.getTag("author");

            if (nbttagstring != null)
            {
                par3List.add(EnumChatFormatting.GRAY + String.format("from " + nbttagstring.data));
            }
        }
    }

public boolean onItemUse(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, World par3World, int par4, int par5, int par6, int par7, float par8, float par9, float par10)
{
	TileEntity tile_entity = par3World.getBlockTileEntity(par4, par5, par6);
	if(!par3World.isRemote)
	{
		if(par2EntityPlayer.capabilities.isCreativeMode && par2EntityPlayer.isSneaking())
		{
			par2EntityPlayer.addChatMessage("You cannot use this in creative.");
		}
		else if(tile_entity instanceof TileEntityMailBox)
		{
			TileEntityMailBox tileEntityMailBox = (TileEntityMailBox)tile_entity;
			if(tileEntityMailBox.isMailBoxFull() == false && par2EntityPlayer.isSneaking() && !par3World.isRemote)
			{
				ItemStack itemStack = par1ItemStack.copy();
				tileEntityMailBox.addMail(itemStack);
				par2EntityPlayer.addChatMessage("Thank you! - " + tileEntityMailBox.ownerName);
				par1ItemStack.stackSize--;
			}
			else if(tileEntityMailBox.isMailBoxFull() == true && par2EntityPlayer.isSneaking())
			{
				par2EntityPlayer.addChatMessage(tileEntityMailBox.ownerName + "'s mail box seems to be full. Try again later.");
			}
		}
	}
	return true;    
}

public ItemStack onItemRightClick(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer)
{
	if(!par2World.isRemote)
	{
		par3EntityPlayer.openGui(MrCrayfishFurnitureMod.instance, 6, par2World, 0, 0, 0);
	}
	return par1ItemStack;
}

public static IInventory getInv(EntityPlayer par1EntityPlayer) 
{
	ItemStack mail = par1EntityPlayer.getCurrentEquippedItem();
	InventoryEnvelope invMail = null;
	if(mail != null && mail.getItem() instanceof ItemEnvelopeSigned)
	{
		invMail = new InventoryEnvelope(par1EntityPlayer, mail);
	}
	return invMail;
}

public void registerIcons(IconRegister par1IconRegister)
    {
	this.itemIcon = par1IconRegister.registerIcon("cfm:itemenvelope");
    }

@SideOnly(Side.CLIENT)
    public boolean hasEffect(ItemStack par1ItemStack)
    {
	return true;
    }
}

GuiHandler

package com.mrcrayfish.furniture;

import cpw.mods.fml.common.network.IGuiHandler;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.src.*;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;

public class GuiHandler implements IGuiHandler
{
@Override
public Object getServerGuiElement(int id, EntityPlayer player, World world, int x, int y, int z)
{
	TileEntity tile_entity = world.getBlockTileEntity(x, y, z);
	if(id == 5)
	{
		return new ContainerEnvelope(player.inventory, ItemEnvelope.getInv(player));
	}
	if(id == 6)
	{
		return new ContainerEnvelope(player.inventory, ItemEnvelopeSigned.getInv(player));
	}
	return null;
}

@Override
public Object getClientGuiElement(int id, EntityPlayer player, World world, int x, int y, int z)
{
	TileEntity tile_entity = world.getBlockTileEntity(x, y, z);
	if(id == 5)
	{
		return new GuiEnvelope(player.inventory, ItemEnvelope.getInv(player), player);
	}
	if(id == 6)
	{
		return new GuiEnvelope(player.inventory, ItemEnvelopeSigned.getInv(player), player);
	}
	return null;
}
}

GotoLink · July 13, 2013

In your main mod class, at the NetworkMod annotation, did you set packetHandler=PacketManager.class and your channels {"enveloppe","package"} ?

mr_crayfish · July 14, 2013

In your main mod class, at the NetworkMod annotation, did you set packetHandler=PacketManager.class and your channels {"enveloppe","package"} ?

Yes. This is the exact line in my main class.

@NetworkMod(clientSideRequired = true, serverSideRequired = false, channels = {"envelope", "package"}, packetHandler = PacketManager.class)

pelep · July 14, 2013

not a solution, but i suggest making your channels more unique than "envelope" and "package"

mr_crayfish · July 14, 2013

not a solution, but i suggest making your channels more unique than "envelope" and "package"

Thanks for that tip.

mr_crayfish · July 14, 2013

I found a solution. I had to cast "Player" to "EntityPlayerMP". Works like a charm now. Thank you anyway guys!

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[SOLVED][1.6.2] Packet not sending itemstack nttagcompound.

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