edv:prg:python:example:einfaches_chat-programm

Anonymous (anonymous@undisclosed.example.com) — 2021-12-06T13:30:26+00:00

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	+	====== Einfaches Chat-Programm - Server und Client ======

	+	:!: Dieses Beispiel habe ich dem Artikel Create a Basic LAN Chat Room with Python3 ([[https://python.plainenglish.io/create-a-basic-lan-chat-room-with-python-f334776bf70c]]) entnommen.
	+
	+	Server:
	+	<code python>
	+	#server.py
	+	import socket
	+	import threading
	+
	+	my_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	+	PORT = 8000
	+	ADDRESS = "0.0.0.0"
	+	broadcast_list = []
	+	my_socket.bind((ADDRESS, PORT))
	+
	+	def accept_loop():
	+	while True:
	+	my_socket.listen()
	+	client, client_address = my_socket.accept()
	+	broadcast_list.append(client)
	+	start_listenning_thread(client)
	+
	+	def start_listenning_thread(client):
	+	client_thread = threading.Thread(
	+	target=listen_thread,
	+	args=(client,) #the list of argument for the function
	+	)
	+	client_thread.start()
	+
	+	def listen_thread(client):
	+	while True:
	+	message = client.recv(1024).decode()
	+	if message:
	+	print(f"Received message : {message}")
	+	broadcast(message)
	+	else:
	+	print(f"client has been disconnected : {client}")
	+	return
	+
	+	def broadcast(message):
	+	for client in broadcast_list:
	+	try:
	+	client.send(message.encode())
	+	except:
	+	broadcast_list.remove(client)
	+	print(f"Client removed : {client}")
	+
	+	accept_loop()
	+	</code>
	+
	+
	+	Client:
	+	<code python>
	+	#client.py
	+	import socket
	+	import threading
	+
	+	nickname = input("Choose your nickname : ").strip()
	+	while not nickname:
	+	nickname = input("Your nickname should not be empty : ").strip()
	+
	+	my_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	+	host = "0.0.0.0" # "127.0.1.1"
	+	port = 8000
	+	my_socket.connect((host, port))
	+
	+	def thread_sending():
	+	while True:
	+	message_to_send = input()
	+	if message_to_send:
	+	message_with_nickname = nickname + " : " + message_to_send
	+	my_socket.send(message_with_nickname.encode())
	+
	+	def thread_receiving():
	+	while True:
	+	message = my_socket.recv(1024).decode()
	+	print(message)
	+
	+	thread_send = threading.Thread(target=thread_sending)
	+	thread_receive = threading.Thread(target=thread_receiving)
	+	thread_send.start()
	+	thread_receive.start()
	+	</code>
	+
	+
	+	----
	+	Stand: 06.12.2021\\
	+	--- //[[feedback.jk-wiki@kreick.de\|: Jürgen Kreick]]//
	+
	+	EOF

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