A peer-to-peer file sharing application with integrated chat functionality, allowing users to connect, communicate, and share files directly with each other.
- 👤 User Authentication: Connect with a username and maintain persistent sessions
- 💬 Real-time Chat: Send and receive messages with all connected users
- 📁 File Sharing: Transfer files directly between users
- 📂 Folder Sharing: Share entire folders with other users
- 🔍 File Discovery: Look up and browse other users' shared directories
- 🔄 Automatic Reconnection: Seamlessly reconnect with your existing session
- 👥 Status Tracking: Monitor which users are currently online
- 🎨 Colorful UI: Enhanced CLI interface with colors and emojis
- 📊 Progress Bars: Visual feedback for file and folder transfers
- 🔒 Data Integrity: MD5 checksum verification for files and folders
- Go (1.16 or later) 🔧
- Clone the repository ⬇️
git clone https://github.com/Harsh2563/DrizLink_Cli.git
cd DrizLink_Cli- Build the application 🛠️
go build -o DrizLink_Cli# Start server on default port 8080
go run ./server/cmd --port 8080
# Start server on custom port
go run ./server/cmd --port 3000
# Connect to local server with default port
go run ./client/cmd --server localhost:8080
# Connect to remote server
go run ./client/cmd --server 192.168.0.203:4000
The application will validate:
- Server availability before client connection attempts
- Port availability before starting a server
- Existence of shared folder paths
The application follows a hybrid P2P architecture:
- 🌐 A central server handles user registration, discovery, and connection brokering
↔️ File and folder transfers occur directly between peers- 💓 Server maintains connection status through regular heartbeat checks
| Command | Description |
|---|---|
/help |
Show all available commands |
/status |
Show online users |
exit |
Disconnect and exit the application |
| Command | Description |
|---|---|
/lookup <userId> |
Browse user's shared files |
/sendfile <userId> <filePath> |
Send a file to another user |
/sendfolder <userId> <folderPath> |
Send a folder to another user |
/download <userId> <filename> |
Download a file from another user |
-
🌈 Color-coded messages:
- Commands appear in blue
- Success messages appear in green
- Error messages appear in red
- User status notifications in yellow
-
📊 Progress bars for file transfers:
[===================================>------] 75% (1.2 MB/1.7 MB) -
📁 Improved file listings:
=== FOLDERS === 📁 [FOLDER] documents (Size: 0 bytes) 📁 [FOLDER] images (Size: 0 bytes) === FILES === 📄 [FILE] document.pdf (Size: 1024 bytes) 📄 [FILE] image.jpg (Size: 2048 bytes)
The application implements basic reconnection security by tracking IP addresses and user sessions.
- 📁 Folder Path Validation: The application verifies that shared folder paths exist before establishing a connection. If an invalid path is provided, the user will be prompted to enter a valid folder path.
- 🔌 Server Availability Check: Client automatically verifies server availability before attempting connection, preventing connection errors.
- 🚫 Port Conflict Prevention: Server detects if a port is already in use and alerts the user to choose another port.
- 🔐 Checksum Verification: All file and folder transfers include MD5 checksum calculation to verify data integrity:
- When sending, a unique MD5 hash is calculated for the file/folder contents
- During transfer, the hash is securely transmitted alongside the data
- Upon receiving, a new hash is calculated from the received data
- The application compares both hashes to confirm the transfer was successful and uncorrupted
- Users receive visual confirmation of integrity checks with clear success/failure messages
This checksum process ensures that files and folders arrive exactly as they were sent, protecting against data corruption during transfer.
Made with ❤️ by the DrizLink Team