Netty WebSocket Game Server

A simple game server implementation using Netty 4 with WebSocket support.

Features

• WebSocket-based game server using Netty 4
• JSON message protocol for client-server communication
• Built-in HTTP server for serving the web client
• Simple web-based test client

Prerequisites

• Java 11 or higher
• Maven 3.6 or higher

Building the Project

mvn clean package

Running the Server

java -cp target/netty-game-server-1.0-SNAPSHOT.jar com.gameserver.GameServer

By default, the server runs on port 8080. You can specify a different port as a command-line argument:

java -cp target/netty-game-server-1.0-SNAPSHOT.jar com.gameserver.GameServer 9000

Testing the Server

1. Start the server using the instructions above
2. Open a web browser and navigate to http://localhost:8080
3. Use the web interface to send test messages to the server

Message Protocol

The server uses a simple JSON-based message protocol:

{
    "type": "MESSAGE_TYPE",
    "payload": "Message content"
}

Supported Message Types

• PING: Basic ping message
• Any other type will be echoed back with a SERVER_RESPONSE type

Project Structure

• GameServer.java: Main server class that initializes Netty
• GameWebSocketHandler.java: Handles WebSocket frame processing
• GameMessage.java: Message model for client-server communication
• HttpStaticFileHandler.java: Serves static web content
• index.html: Web-based test client