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#!/usr/bin/env python
"""
A simple Telnet application that asks for input and responds.
The interaction function is an asyncio coroutine.
WARNING: This is experimental! Prompt_toolkit TaskLocals don't work together
with asyncio coroutines. This is also why we have to specify the
output and input manually.
"""
from __future__ import unicode_literals
from prompt_toolkit.contrib.telnet.server import TelnetServer
from prompt_toolkit.eventloop.defaults import use_asyncio_event_loop
from prompt_toolkit.shortcuts import PromptSession
import logging
import asyncio
# Set up logging
logging.basicConfig()
logging.getLogger().setLevel(logging.INFO)
# Tell prompt_toolkit to use the asyncio event loop.
use_asyncio_event_loop()
async def interact(connection):
session = PromptSession(output=connection.vt100_output, input=connection.vt100_input)
connection.erase_screen()
connection.send('Welcome!\n')
# Ask for input.
result = await session.prompt(message='Say something: ', async_=True)
# Send output.
connection.send('You said: {}\n'.format(result))
connection.send('Bye.\n')
def main():
server = TelnetServer(interact=interact, port=2323)
server.start()
asyncio.get_event_loop().run_forever()
if __name__ == '__main__':
main()
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