001-tcp_echo_server.py

# Init code for Protocol practice
import socket
import logging


logger = logging.getLogger(__name__)
logging.basicConfig(
    level=logging.DEBUG,
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
    encoding="utf-8",
)


class Server:
    def __init__(self, host="127.0.0.1", port=5000):
        self.host = host
        self.port = port

    def run(self):
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            s.bind((self.host, self.port))
            s.listen()
            logger.info(f"Server listening on {self.host}:{self.port}")

            conn, addr = s.accept()
            with conn:
                logger.debug(f"Connected by {addr}")
                data = conn.recv(1024)
                if data:
                    conn.sendall(data)
                logger.info("Server closing after one echo")


if __name__ == "__main__":
    tcp_echo = Server(host="127.0.0.1", port=5000)
    tcp_echo.run()