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A dynamic web terminal service built with Babashka that provides on-demand terminal sessions through a web interface. This service integrates ttyd (web-based terminal) with Traefik for dynamic routing and automatic session management.

• Dynamic Session Management: Creates isolated terminal sessions with unique URLs
• Traefik Integration: Automatic reverse proxy configuration for each session
• Auto-cleanup: Sessions automatically terminate after specified timeout
• RESTful API: Simple HTTP API for session management
• Process Isolation: Each session runs in its own process with configurable timeouts

Start a new terminal session with a specified command.

Request Body:

{
  "command": "htop",
  "timeout": 300
}

Response:

{
  "url": "/session/550e8400-e29b-41d4-a716-446655440000",
  "session-id": "550e8400-e29b-41d4-a716-446655440000",
  "timeout": 300,
  "expires-at": 1691234567890
}

List all active sessions and their status.

Response:

{
  "active-sessions": 2,
  "sessions": [
    {
      "session-id": "550e8400-e29b-41d4-a716-446655440000",
      "command": "htop",
      "port": 9123,
      "uptime": 45000
    }
  ]
}

Manually cleanup a specific session.

Response:

{
  "message": "Session cleaned up"
}

1. Start a new session:

   curl -X POST http://localhost/api/execute \
     -H "Content-Type: application/json" \
     -d '{"command": "htop", "timeout": 300}'
       

2. Access the terminal: Open the returned URL in your browser to access the web-based terminal.
3. Check active sessions:

   curl http://localhost/api/status
       

1. Session Creation: When a new session is requested, the service:
   • Generates a unique session ID and port
   • Starts a ttyd process with the specified command
   • Creates a Traefik configuration file for routing
   • Sets up automatic cleanup after timeout
2. Routing: Traefik dynamically routes requests to /session/{session-id} to the appropriate ttyd instance
3. Cleanup: Sessions are automatically cleaned up after the specified timeout plus a 10-second buffer, removing:
   • The running process
   • Traefik configuration file
   • Session from active sessions registry