minecraft protocol

Parse and serialize minecraft packets, plus authentication and encryption.

Features

• Supports Minecraft version 1.8.8
• Parses all packets and emits events with packet fields as JavaScript objects.
• Send a packet by supplying fields as a JavaScript object.
• Client
  • Authenticating and logging in
  • Encryption
  • Compression
  • Both online and offline mode
  • Respond to keep-alive packets.
  • Ping a server for status
• Server
  • Online/Offline mode
  • Encryption
  • Compression
  • Handshake
  • Keep-alive checking
  • Ping status
• Robust test coverage.
• Optimized for rapidly staying up to date with Minecraft protocol updates.

Projects Using node-minecraft-protocol

• mineflayer - create minecraft bots with a stable, high level API.
• mcserve - runs and monitors your minecraft server, provides real-time web interface, allow your users to create bots.
• flying-squid create minecraft servers with a high level API, also a minecraft server by itself.

Usage

Echo client example

var mc = require('minecraft-protocol');
var client = mc.createClient({
  host: "localhost",   // optional
  port: 25565,         // optional
  username: "email@example.com",
  password: "12345678",
});
client.on('chat', function(packet) {
  // Listen for chat messages and echo them back.
  var jsonMsg = JSON.parse(packet.message);
  if(jsonMsg.translate == 'chat.type.announcement' || jsonMsg.translate == 'chat.type.text') {
    var username = jsonMsg.with[0].text;
    var msg = jsonMsg.with[1];
    if(username === client.username) return;
    client.write('chat', {message: msg});
  }
});

If the server is in offline mode, you may leave out the password option.

Hello World server example

var mc = require('minecraft-protocol');
var server = mc.createServer({
  'online-mode': true,   // optional
  encryption: true,      // optional
  host: '0.0.0.0',       // optional
  port: 25565,           // optional
});
server.on('login', function(client) {
  client.write('login', {
    entityId: client.id,
    levelType: 'default',
    gameMode: 0,
    dimension: 0,
    difficulty: 2,
    maxPlayers: server.maxPlayers,
    reducedDebugInfo: false
  });
  client.write('position', {
    x: 0,
    y: 1.62,
    z: 0,
    yaw: 0,
    pitch: 0,
    flags: 0x00
  });
  var msg = {
    translate: 'chat.type.announcement',
    "with": [
      'Server',
      'Hello, world!'
    ]
  };
  client.write("chat", { message: JSON.stringify(msg), position: 0 });
});

Installation

npm install minecraft-protocol

URSA, an optional dependency, should improve login times for servers. However, it can be somewhat complicated to install.

Follow the instructions from Obvious/ursa

Documentation

See doc

Testing

• Ensure your system has the java executable in PATH.
• Download the appropriate version of minecraft_server.jar.
• MC_SERVER_JAR=path/to/minecraft_server.jar MC_USERNAME=email@example.com MC_PASSWORD=password npm test

Debugging

You can enable some protocol debugging output using NODE_DEBUG environment variable:

NODE_DEBUG="minecraft-protocol" node [...]

History

See history