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July 26, 2017 16:26
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Tornado echo TCP Server & Client. Refer to the corresponding repo for the full working example: https://github.com/Databrawl/real_time_tcp/tree/3147a3f4bddf70616f19a7e4c41df6118d5f348a.
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from tornado import gen | |
from tornado.ioloop import IOLoop | |
from tornado.tcpclient import TCPClient | |
class Client(TCPClient): | |
msg_separator = b'\r\n' | |
@gen.coroutine | |
def run(self, host, port): | |
stream = yield self.connect(host, port) | |
while True: | |
data = input(">> ").encode('utf8') | |
data += self.msg_separator | |
if not data: | |
break | |
else: | |
yield stream.write(data) | |
data = yield stream.read_until(self.msg_separator) | |
body = data.rstrip(self.msg_separator) | |
print(body) | |
if __name__ == '__main__': | |
Client().run('localhost', 5567) | |
print('Connecting to server socket...') | |
IOLoop.instance().start() | |
print('Socket has been closed.') |
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from tornado import gen | |
from tornado.ioloop import IOLoop | |
from tornado.iostream import StreamClosedError | |
from tornado.tcpserver import TCPServer | |
class Server(TCPServer): | |
message_separator = b'\r\n' | |
@gen.coroutine | |
def handle_stream(self, stream, address): | |
while True: | |
try: | |
request = yield stream.read_until(self.message_separator) | |
except StreamClosedError: | |
stream.close(exc_info=True) | |
return | |
try: | |
yield stream.write(request) | |
except StreamClosedError: | |
stream.close(exc_info=True) | |
return | |
if __name__ == '__main__': | |
Server().listen(5567) | |
print('Starting the server...') | |
IOLoop.instance().start() | |
print('Server has shut down.') |
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