linux 101 add chat code

pages/linux101.md

@@ -152,7 +152,115 @@ except KeyboardInterrupt:
     print('Hello user you have pressed ctrl-c button.')
 ~~~
 
+## create a simple chat with python 
 
+[https://python.plainenglish.io/create-a-basic-lan-chat-room-with-python-f334776bf70c](https://python.plainenglish.io/create-a-basic-lan-chat-room-with-python-f334776bf70c)
+
+
+fixed code 
+
+===client=== 
+
+~~~python 
+import socket
+import threading
+
+my_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+
+PORT = 8000
+ADDRESS = "localhost" # Same as "127.0.1.1"
+
+my_socket.connect((ADDRESS, PORT))
+
+nickname = input("Choose your nickname : ").strip()
+
+
+while not nickname:
+    nickname = input("Your nickname should not be empty : ").strip()
+    
+    
+
+def thread_sending():
+    while True:   
+        message_to_send = input("your message :")
+        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()
+~~~
+
+===server===
+
+~~~python 
+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 thread_accept():
+    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}")
+            
+
+thread_accept()
+
+~~~
+
+
+
+
+--------
 
 ## create folder in ```apache``` server