Telnet-TTY

A TTY-compatible Telnet interface for node.js

Telnet-TTY consists of the following functions:

• a simple telnet server
• a TTY interface for each telenet session

Each connection to the telnet server is mapped by an instance of the TelnetSession class. This class implements the node.js Duplex interface of the node:stream module. In addition, some necessary TTY functions have been added to comply with the node:tty interface.

Note: this module is still at a very early stage!

Examples

Readline interface

This example demonstrates how a telnet-tty session can be connected to the node:readline interface of node.js.

import { createInterface } from 'node:readline';
import { TelnetServer } from 'telnet-tty';

const server = new TelnetServer();

server.on('connection', (session) =>
{
  const rl = createInterface(
  {
    input: session,
    output: session,
    prompt: 'PROMPT> ',
  });

  rl.prompt();

  rl.on('line', (line) =>
  {
    switch (line.trim())
    {
      case 'hello':
        session.write('world!\n');
        break;

      default:
        session.write(`Say what? I might have heard '${line.trim()}'\n`);
        break;
    }
    rl.prompt();
  });

  rl.on('error', console.log);

  session.on('resize', () =>
  {
    console.log(session.getWindowSize());
  });
});

server.listen(23);