Netty应用示例（四）websocket应用示例

1、server端实现

源码实现：

public void run(int port){
   EventLoopGroup bossGroup = new NioEventLoopGroup();
   EventLoopGroup workGroup = new NioEventLoopGroup();
   try{
      ServerBootstrap b = new ServerBootstrap();
      b.group(bossGroup, workGroup)
      .channel(NioServerSocketChannel.class)
      .childHandler(new ChannelInitializer() {

         @Override
         protected void initChannel(SocketChannel sc) throws Exception {
            ChannelPipeline pipeline = sc.pipeline();
            // 服务端，对请求解码  
            pipeline.addLast("http-codec", new HttpServerCodec());
            // 聚合器，把多个消息转换为一个单一的FullHttpRequest或是FullHttpResponse  
            pipeline.addLast("aggregator", new HttpObjectAggregator(65536));
             // 块写入处理器
            pipeline.addLast("http-chunked",new ChunkedWriteHandler());
            //自定义处理器
            pipeline.addLast("handler", new WebSocketServerHandler());
            
         }
      });
      
      ChannelFuture cf = b.bind(port).sync();
      
      System.out.println("Web socket server started at port " + port + '.');
      System.out.println("Open your browser and navigate to http://localhost:" + port + '/');
      
      cf.channel().closeFuture().sync();
      
   }catch(Exception e){
      e.printStackTrace();
   }finally{
      bossGroup.shutdownGracefully();
      workGroup.shutdownGracefully();
      
   }
}

• HttpServerCodec：将请求和应答消息解码为HTTP消息
• HttpObjectAggregator：将HTTP消息的多个部分合成一条完整的HTTP消息
• ChunkedWriteHandler：向客户端发送HTML5文件

2、WebsocketHandler实现

源码实现：

public class WebSocketServerHandler extends SimpleChannelInboundHandler