web-app-from-scratch-1-11.py

NOT_FOUND_RESPONSE = b"""\
HTTP/1.1 404 Not Found
Content-type: text/plain
Content-length: 9

Not Found""".replace(b"\n", b"\r\n")

#...

with socket.socket() as server_sock:
    server_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    server_sock.bind((HOST, PORT))
    server_sock.listen(0)
    print(f"Listening on {HOST}:{PORT}...")

    while True:
        client_sock, client_addr = server_sock.accept()
        print(f"Received connection from {client_addr}...")
        with client_sock:
            try:
                request = Request.from_socket(client_sock)
                print(request)
                client_sock.sendall(NOT_FOUND_RESPONSE)
            except Exception as e:
                print(f"Failed to parse request: {e}")
                client_sock.sendall(BAD_REQUEST_RESPONSE)