PrismarineJS / PrismarineJS/node-minecraft-protocol

cant connect to server example `Internal Exception:io.netty.handler.codec`

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possible bug
Dominant language
JavaScript
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Description

https://github.com/PrismarineJS/node-minecraft-protocol/tree/ee40987dde124cd2f560bb944cfffb29946fef81#hello-world-server-example

const mc = require('minecraft-protocol')
const nbt = require('prismarine-nbt')
const server = mc.createServer({
  'online-mode': true,   // optional
  encryption: true,      // optional
  host: '0.0.0.0',       // optional
  port: 25565,           // optional
  version: '1.18'
})
const mcData = require('minecraft-data')(server.version)

function chatText (text) {
  return mcData.supportFeature('chatPacketsUseNbtComponents')
    ? nbt.comp({ text: nbt.string(text) })
    : JSON.stringify({ text })
}

server.on('playerJoin', function(client) {
  const loginPacket = mcData.loginPacket

  client.write('login', {
    ...loginPacket,
    enforceSecureChat: false,
    entityId: client.id,
    hashedSeed: [0, 0],
    maxPlayers: server.maxPlayers,
    viewDistance: 10,
    reducedDebugInfo: false,
    enableRespawnScreen: true,
    isDebug: false,
    isFlat: false
  })

  client.write('position', {
    x: 0,
    y: 255,
    z: 0,
    yaw: 0,
    pitch: 0,
    flags: 0x00
  })

  const message = {
    translate: 'chat.type.announcement',
    with: [
      'Server',
      'Hello, world!'
    ]
  }
  if (mcData.supportFeature('signedChat')) {
    client.write('player_chat', {
      plainMessage: message,
      signedChatContent: '',
      unsignedChatContent: chatText(message),
      type: mcData.supportFeature('chatTypeIsHolder') ? { chatType: 1 } : 0,
      senderUuid: 'd3527a0b-bc03-45d5-a878-2aafdd8c8a43', // random
      senderName: JSON.stringify({ text: 'me' }),
      senderTeam: undefined,
      timestamp: Date.now(),
      salt: 0n,
      signature: mcData.supportFeature('useChatSessions') ? undefined : Buffer.alloc(0),
      previousMessages: [],
      filterType: 0,
      networkName: JSON.stringify({ text: 'me' })
    })
  } else {
    client.write('chat', { message: JSON.stringify({ text: message }), position: 0, sender: 'me' })
  }
})

Using node-mincraft-protocol version 1.66.2

I get this when connecting to the server with a vanilla client in version 1.18 launched with Prism Launcher.

Image

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked Hello World server example and reproduce the connection using node-minecraft-protocol 1.66.2 and a vanilla Minecraft 1.18 client. Inspect the server and client error output around the login and chat packets; done means the example accepts the connection without the reported Internal Exception.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, node.js
Domain
backend, networking
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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