Learning Python Network Programming

A simple echo server

As we work through this chapter, we'll find ourselves reusing several pieces of code, so to save ourselves from repetition, we'll set up a module with useful functions that we can reuse as we go along. Create a file called tincanchat.py and save the following code in it:

import socket HOST = '' PORT = 4040 def create_listen_socket(host, port): """ Setup the sockets our server will receive connection requests on """ sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) sock.bind((host, port)) sock.listen(100) return sock def recv_msg(sock): """ Wait for data to arrive on the socket, then parse into messages using b'\0' as message delimiter """ data = bytearray() msg ...