telnetlib3

import telnetlib3 import asyncio import os async def simple_shell(reader, writer): peername = writer.get_extra_info('peername') print(f'Client {peername} connected.') writer.write(f'Hello, {peername}! Type something and press Enter (or Ctrl+C to quit). ') while True: try: text = await reader.read(1024) if not text: break print(f'Received from {peername}: {text!r}') writer.write(f'You said: {text!r} ') await writer.drain() except asyncio.IncompleteReadError: break # Client disconnected except ConnectionResetError: break # Client forcibly closed print(f'Client {peername} disconnected.') async def main(): # Use os.environ for port to make it runnable without hardcoding port = int(os.environ.get('TELNET_PORT', '6023')) server = await telnetlib3.create_server(port=port, shell=simple_shell) print(f"Telnet server listening on port {port}") async with server: await server.serve_forever() if __name__ == '__main__': try: asyncio.run(main()) except KeyboardInterrupt: print("Server stopped gracefully.")