hello-websocket-nodejs/
├── package.json            # npm package definition
├── common/
│   ├── codec.js            # Binary protocol codec
│   └── codec.test.js       # Codec unit tests
├── server/
│   └── ws_server.js        # WebSocket server
├── client/
│   └── ws_client.js        # WebSocket client
├── scripts/
│   ├── build.sh            # Install and test
│   ├── run-server.sh       # Run server
│   └── run-client.sh       # Run client
└── README.md