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#!/usr/bin/env python
import asyncio
import logging
from tornado import gen
from tornado.iostream import StreamClosedError
from tornado.tcpserver import TCPServer
from tornado.options import options, define
define("port", default=9888, help="TCP port to listen on")
logger = logging.getLogger(__name__)
class EchoServer(TCPServer):
@gen.coroutine
def handle_stream(self, stream, address):
while True:
try:
data = yield stream.read_until(b"\n")
logger.info("Received bytes: %s", data)
if not data.endswith(b"\n"):
data = data + b"\n"
yield stream.write(data)
except StreamClosedError:
logger.warning("Lost client at host %s", address[0])
break
except Exception as e:
print(e)
async def main():
options.parse_command_line()
logger.info("Listening on TCP port %d", options.port)
server = EchoServer()
server.listen(options.port)
await asyncio.Event().wait()
if __name__ == "__main__":
asyncio.run(main())
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