A benefit of the multithreading approach is that the OS handles the thread switches for us, which means we can continue to write our program in a procedural style. Hence we only need to make small adjustments to our server program to make it multithreaded, and thus, capable of handling multiple clients simultaneously.
Create a new file called 1.3-echo_server-multi.py and add the following code to it:
import threading
import tincanchat
HOST = tincanchat.HOST
PORT = tincanchat.PORT
def handle_client(sock, addr):
""" Receive one message and echo it back to client, then close
socket """
try:
msg = tincanchat.recv_msg(sock) # blocks until received
# complete message
msg = '{}: {}'.format(addr, msg)
print(msg)
tincanchat.send_msg(sock, msg) # blocks until sent
except (ConnectionError, BrokenPipeError):
print('Socket error')
finally:
print('Closed connection...