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Commit2f6da6e

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add chat application tutorial
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‎README.md

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@@ -110,6 +110,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
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-[How to Work with JSON Files in Python](https://www.thepythoncode.com/article/working-with-json-files-in-python). ([code](python-standard-library/working-with-json))
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-[How to Use Regular Expressions in Python](https://www.thepythoncode.com/article/work-with-regular-expressions-in-python). ([code](python-standard-library/regular-expressions))
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-[Logging in Python](https://www.thepythoncode.com/article/logging-in-python). ([code](python-standard-library/logging))
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-[How to Make a Chat Application in Python](https://www.thepythoncode.com/article/make-a-chat-room-application-in-python). ([code](python-standard-library/chat-application))
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-###[Using APIs](https://www.thepythoncode.com/topic/using-apis-in-python)
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-[How to Automate your VPS or Dedicated Server Management in Python](https://www.thepythoncode.com/article/automate-veesp-server-management-in-python). ([code](general/automating-server-management))
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#[How to Make a Chat Application in Python](https://www.thepythoncode.com/article/make-a-chat-room-application-in-python)
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To run this:
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-`pip3 install -r requirements.txt`
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- Run`server.py` first to initialize the server.
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- Run one or more`client.py` instances and chat!
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- If you want to run`client.py` from another machine, make sure you change`SERVER_HOST` in`client.py` to the server's IP address.
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importsocket
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importrandom
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fromthreadingimportThread
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fromdatetimeimportdatetime
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fromcoloramaimportFore,init,Back
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# init colors
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init()
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# set the available colors
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colors= [Fore.BLUE,Fore.CYAN,Fore.GREEN,Fore.LIGHTBLACK_EX,
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Fore.LIGHTBLUE_EX,Fore.LIGHTCYAN_EX,Fore.LIGHTGREEN_EX,
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Fore.LIGHTMAGENTA_EX,Fore.LIGHTRED_EX,Fore.LIGHTWHITE_EX,
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Fore.LIGHTYELLOW_EX,Fore.MAGENTA,Fore.RED,Fore.WHITE,Fore.YELLOW
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]
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# choose a random color for the client
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client_color=random.choice(colors)
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# server's IP address
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# if the server is not on this machine,
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# put the private (network) IP address (e.g 192.168.1.2)
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SERVER_HOST="127.0.0.1"
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SERVER_PORT=5002# server's port
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separator_token="<SEP>"# we will use this to separate the client name & message
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# initialize TCP socket
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s=socket.socket()
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print(f"[*] Connecting to{SERVER_HOST}:{SERVER_PORT}...")
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# connect to the server
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s.connect((SERVER_HOST,SERVER_PORT))
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print("[+] Connected.")
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# prompt the client for a name
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name=input("Enter your name: ")
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deflisten_for_messages():
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whileTrue:
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message=s.recv(1024).decode()
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print("\n"+message)
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# make a thread that listens for messages to this client & print them
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t=Thread(target=listen_for_messages)
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# make the thread daemon so it ends whenever the main thread ends
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t.daemon=True
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# start the thread
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t.start()
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whileTrue:
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# input message we want to send to the server
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to_send=input()
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# a way to exit the program
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ifto_send.lower()=='q':
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break
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# add the datetime, name & the color of the sender
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date_now=datetime.now().strftime('%Y-%m-%d %H:%M:%S')
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to_send=f"{client_color}[{date_now}]{name}{separator_token}{to_send}{Fore.RESET}"
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# finally, send the message
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s.send(to_send.encode())
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# close the socket
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s.close()
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colorama
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importsocket
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fromthreadingimportThread
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# server's IP address
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SERVER_HOST="0.0.0.0"
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SERVER_PORT=5002# port we want to use
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separator_token="<SEP>"# we will use this to separate the client name & message
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# initialize list/set of all connected client's sockets
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client_sockets=set()
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# create a TCP socket
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s=socket.socket()
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# make the port as reusable port
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s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
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# bind the socket to the address we specified
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s.bind((SERVER_HOST,SERVER_PORT))
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# listen for upcoming connections
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s.listen(5)
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print(f"[*] Listening as{SERVER_HOST}:{SERVER_PORT}")
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deflisten_for_client(cs):
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"""
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This function keep listening for a message from `cs` socket
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Whenever a message is received, broadcast it to all other connected clients
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"""
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whileTrue:
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try:
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# keep listening for a message from `cs` socket
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msg=cs.recv(1024).decode()
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exceptExceptionase:
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# client no longer connected
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# remove it from the set
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print(f"[!] Error:{e}")
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client_sockets.remove(cs)
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else:
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# if we received a message, replace the <SEP>
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# token with ": " for nice printing
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msg=msg.replace(separator_token,": ")
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# iterate over all connected sockets
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forclient_socketinclient_sockets:
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# and send the message
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client_socket.send(msg.encode())
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whileTrue:
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# we keep listening for new connections all the time
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client_socket,client_address=s.accept()
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print(f"[+]{client_address} connected.")
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# add the new connected client to connected sockets
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client_sockets.add(client_socket)
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# start a new thread that listens for each client's messages
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t=Thread(target=listen_for_client,args=(client_socket,))
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# make the thread daemon so it ends whenever the main thread ends
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t.daemon=True
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# start the thread
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t.start()
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# close client sockets
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forcsinclient_sockets:
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cs.close()
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# close server socket
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s.close()

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