zv3zdochka / TCP-Messenger

This project is a client-server application for exchanging messages with support for chats and rooms.

TCP Chat Server and Client

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This project is a client-server application for exchanging messages with support for chats and rooms. The server and client communicate via the TCP protocol.

Key Features

Server

• User Authentication:

  • Connecting new users with registration.
  • Login of registered users with password verification.
  • Storing passwords as SHA-1 hashes.

• General Chat and Rooms:

  • Maintaining a general chat.
  • Creating rooms and connecting to them.
  • Exchanging messages within rooms.
  • Switching between rooms and the general chat.

• Commands:

  • /create <name> — creating a new room with password generation.
  • /join <name> <password> — connecting to a room using a password.
  • /exit — exiting a room and returning to the general chat.

• Data Persistence:

  • Saving user and room data upon server shutdown.
  • Restoring data upon server restart.

Client

• Connection to the Server:
  • Entering a login and password for authentication.
  • Sending and receiving messages in real-time.
  • Handling system commands and messages.

Installation and Usage

Server

1. Ensure you have Python 3.8 or higher installed.
2. Install the necessary dependencies:

   pip install requirements.txt

3. Run the server:

   python Server.py

Client

1. Ensure you have Python 3.8 or higher installed.
2. Install the necessary dependencies:

   pip install requirements.txt

3. Run the client application:

   python client.py

File Descriptions

Server.py

This file contains the implementation of the server-side of the application. Key functions include:

• Handling client connections.
• User authentication.
• Managing the general chat and supporting rooms.
• Saving and restoring data upon server shutdown and restart.

Key functions and variables:

• save_data(), load_data() — functions for saving and loading data.
• handle_client() — function for handling messages from the client.
• broadcast() — function for sending messages to all clients.
• shutdown_server() — signal handler for gracefully shutting down the server.

Client.py

This file contains the implementation of the client-side of the application. Key functions include:

• Connecting to the server.
• Authenticating with login and password input.
• Sending messages to and receiving messages from the server.
• Handling chat commands and system messages.

Key functions and variables:

• keyboard_input() — function for sending messages inputted by the user.
• receive_messages() — function for receiving and displaying messages from the server.

Usage

1. Start the server-side as described above.
2. Launch the client application, specifying the server's IP address and port.
3. After successful connection, enter your login and password. If it's a new login, you'll need to enter the password twice for registration.
4. After authentication, you can use chat commands or simply communicate with other users.

Example Commands

• Create a room:

  /create myroom
  

• Join a room:

  /join myroom 1234
  

• Exit a room and return to the general chat:

  /exit
  

Data Persistence

The server saves user and room data upon normal shutdown (Ctrl+C). This data will be loaded upon the next server restart.

System Requirements

• Python 3.8 or higher
• Libraries: socket, threading, datetime, functools, sys, colorama, hashlib, signal, pickle, os.

License

This project is licensed under the Apache 2.0 license.