http2irc/testserver.py

import asyncio
import logging
import random


logging.basicConfig(level = logging.INFO, format = '{asctime} {levelname} {message}', style = '{')


class EchoServerProtocol(asyncio.Protocol):
	def __init__(self, loop = None):
		self.loop = loop or asyncio.get_event_loop()

	def send(self, data):
		logging.info(f'Send: {data!r}')
		self.transport.write(data)

	def connection_made(self, transport):
		peername = transport.get_extra_info('peername')
		logging.info('Connection from {}'.format(peername))
		self.transport = transport
		self.connected = True
		asyncio.create_task(self.pingloop())

	async def pingloop(self):
		while self.connected:
			self.send(b'PING :' + str(random.randint(0, 10000)).encode('ascii') + b'\r\n')
			await asyncio.sleep(10)

	def data_received(self, data):
		logging.info('Data received: {!r}'.format(data))

	def connection_lost(self, exc):
		logging.info(f'Connection to {self.transport.get_extra_info("peername")} lost')
		self.connected = False


async def main():
	# Get a reference to the event loop as we plan to use
	# low-level APIs.
	loop = asyncio.get_running_loop()

	server = await loop.create_server(
		lambda: EchoServerProtocol(),
		'127.0.0.1', 8888)

	async with server:
		await server.serve_forever()


asyncio.run(main())