Minecraft Server Utilities 🛠️

A modern Node.js library for interacting with Minecraft Java Edition servers. Query server status and execute RCON commands with ease.

Features ✨

• ✅ Server status checking (MOTD, players, version)
• 🔑 Secure RCON command execution
• 📢 Built-in say command helper
• ⏱️ Configurable timeouts (10s default)
• 🔍 Debug logging capabilities
• 🛡️ Comprehensive error handling

Installation 📦

npm install mc-server-util

Usage Examples 🚀

Basic Server Status Check

import { getMinecraftServerStatus } from 'mc-server-util';

try {
  const status = await getMinecraftServerStatus('mc.example.com');
  console.log(`Server version: ${status.version.name}`);
  console.log(`Players online: ${status.players.online}`);
} catch (error) {
  console.error('Server offline:', error.message);
}

Execute RCON Command

import { sendRconCommand } from 'mc-server-util';

const response = await sendRconCommand(
  'mc.example.com',
  25575,
  'secure-password',
  'whitelist add PlayerName'
);
console.log('Command response:', response);

Broadcast Server Message

import { sendRconSayCommand } from 'mc-server-util';

await sendRconSayCommand(
  'mc.example.com',
  'secure-password',
  'Server maintenance in 5 minutes!'
);

API Documentation 📖

getMinecraftServerStatus(host, [port = 25565], [debug = false])

Returns: Promise<ServerStatus>

ServerStatus Object:

{
  online: boolean,
  version: {
    name: string,
    protocol: number
  },
  players: {
    max: number,
    online: number,
    sample?: Player[],
    nicknames?: string
  },
  description: string,
  favicon?: string
}

sendRconCommand(host, [port = 25575], password, command, [debug = false])

Returns: Promise<string>

sendRconSayCommand(host, password, message, [debug = false])

Returns: Promise<string>

Advanced Configuration ⚙️

Debug Mode

// Enable debug logging
await getMinecraftServerStatus('mc.example.com', 25565, true);

// Example debug output:
// Connected to server, sending handshake
// Handshake packet: 0f0000...
// Received data chunk: 0f0000...

Custom Timeout

// Create custom timeout (in milliseconds)
const status = await getMinecraftServerStatus('mc.example.com', 25565, {
  debug: false,
  timeout: 15000
});

Error Handling ⚠️

Common error scenarios:

• Connection timeout - Server not responding
• RCON authentication failed - Incorrect password
• Invalid RCON packet - Protocol mismatch

Example error handling:

try {
  await sendRconCommand('mc.example.com', 25575, 'wrong-password', 'help');
} catch (error) {
  if (error.message.includes('authentication failed')) {
    console.error('Invalid RCON credentials');
  } else {
    console.error('Connection error:', error.message);
  }
}

Security Best Practices 🔒

1. Never hardcode credentials
   Use environment variables:

   import dotenv from 'dotenv';
   dotenv.config();
   
   sendRconCommand(
     process.env.MC_HOST,
     process.env.MC_RCON_PORT,
     process.env.MC_RCON_PASSWORD,
     'save-all'
   );

2. Validate user input
   Sanitize command inputs:

   const sanitizeInput = (input) => input.replace(/[^\w\s-]/g, '');
   const safeCommand = sanitizeInput(userInput);

Contributing 🤝

We welcome contributions! Please follow these steps:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/your-feature)
3. Commit changes with descriptive messages
4. Push to your branch (git push origin feature/your-feature)
5. Open a Pull Request

License 📄

MIT © Alex Mashkovtsev

---

Protocol Reference
For low-level protocol details, see the Minecraft Protocol Specification.