In this blog post, we will learn how to create a TCP server in Python using the socketserver package from the Python standard library. TCP (Transmission Control Protocol) is a widely used protocol for transmitting data reliably over a network.

Code Example

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()

The above code demonstrates how to create a TCP server in Python. We define a Handler class that extends the socketserver.BaseRequestHandler class. The handle method within the Handler class is responsible for handling client requests.

Connecting to the Server

To connect to the server and test it, you can use Netcat, a useful utility for testing TCP and UDP servers.

Open a terminal and run the following command to connect to the server:

nc localhost 8000

Once connected, you can send any message by typing it. The server will reply with a confirmation that the message has been received. You can continue sending messages until you type quit to close the connection.

Conclusion

Creating a TCP server in Python is made easy with the socketserver package. By following the code example and using a tool like Netcat, you can easily test and interact with your TCP server. Have fun experimenting and building network applications!

TCP Server Screenshot

Tags: TCP server, Python networking, socket programming