The Python standard library provides the
socketserver package. We can use that to create a TCP server.
from socketserver import BaseRequestHandler, TCPServer class handler(BaseRequestHandler): def handle(self): while True: msg = self.request.recv(1024) if msg == b'quit\n': break self.request.send(b'Message received: ' + msg) with TCPServer(('', 8000), handler) as server: server.serve_forever()
Connect to this using Netcat, a handy utility that is very useful to test-drive TCP and UDP servers. It’s installed by default on Linux and macOS, available under the
nc localhost 8000
Once it’s connected to the server, you can send any message by typing it. The server will reply with a confirmation of the message received.
Until you say
quit. Then the connection will close (but the server will still run, you can connect again)