Netty的http伺服器編程(三)

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Netty提供的handler：HttpServerCodec http 請求編解碼處理類

 

 

第一個netty的例子，，server服務端的編寫，用戶端使用 curl ： http://IP:PORT請求 

 

 

 

服務啟動類

 

 1 public class TestServer { 2  3     public static void main(String[] args) throws Exception { 4  5         //定義兩個線程組 6         EventLoopGroup bossGroup = new NioEventLoopGroup();//接收串連,分發給worker 7         EventLoopGroup workerGroup = new NioEventLoopGroup();//處理串連 8  9         try{10             //啟動伺服器  ： 簡化服務端啟動11             ServerBootstrap serverBootstrap = new ServerBootstrap();12             serverBootstrap.group(bossGroup,workerGroup)13                     .channel(NioServerSocketChannel.class)14                     .childHandler(new TestServerInitializer());//子處理器15 16             //綁定連接埠17             ChannelFuture channelFuture = serverBootstrap.bind(8899).sync();18             channelFuture.channel().closeFuture().sync();19         }finally {20 21             //優雅關閉線程組22             bossGroup.shutdownGracefully();23             workerGroup.shutdownGracefully();24         }25 26 27 28     }29 30 31 }

 

 

 

初始化類 ：

 

 1 public class TestServerInitializer extends ChannelInitializer<SocketChannel> { 2  3     @Override 4     protected void initChannel(SocketChannel ch) throws Exception { 5         //攔截器 6         ChannelPipeline pipeline = ch.pipeline(); 7         //註冊攔截器 8         pipeline.addLast("httpServerCodec",new HttpServerCodec());//請求編解碼 9         pipeline.addLast("testHttpServerHandler",new TestHttpServerHandler());10     }11 }

 

 

 

 

 

自訂處理器類：

 

 1 public class TestHttpServerHandler  extends SimpleChannelInboundHandler<HttpObject> { 2  3     //讀取用戶端的請求，向用戶端返迴響應的方法 4     //計劃在5.0 改名 messagereceived  訊息接收，5.0已廢棄 5     @Override 6     protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception { 7  8         System.out.println(msg.getClass()); 9 10         System.out.println(ctx.channel().remoteAddress());11 12         Thread.sleep(8000);13 14         if(msg instanceof HttpRequest){15             HttpRequest httpRequest = (HttpRequest)msg;16 17             System.out.println("要求方法名："+httpRequest.getMethod().name());18 19             URI uri = new URI(httpRequest.getUri());20             if("/favicon.ico".equals(uri.getPath())){21                 System.out.println("請求favicon.ico");22                 return;23             }24             //構造響應內容25             ByteBuf content = Unpooled.copiedBuffer("hello world", CharsetUtil.UTF_8);26 27             FullHttpResponse response = new DefaultFullHttpResponse(28                     HttpVersion.HTTP_1_1, HttpResponseStatus.OK, content);29 30             response.headers().set(HttpHeaderNames.CONTENT_TYPE,"text/plain");31             response.headers().set(HttpHeaderNames.CONTENT_LENGTH,content.readableBytes());32 33 34             //返迴響應35             ctx.writeAndFlush(response);36             ctx.close();37         }38 39     }40 41     @Override42     public void channelActive(ChannelHandlerContext ctx) throws Exception {43         System.out.println("channel active");44         super.channelActive(ctx);45     }46 47     @Override48     public void channelRegistered(ChannelHandlerContext ctx) throws Exception {49         System.out.println("channel registered");50         super.channelRegistered(ctx);51     }52 53     @Override54     public void handlerAdded(ChannelHandlerContext ctx) throws Exception {55         System.out.println("handler added");56         super.handlerAdded(ctx);57     }58 59     @Override60     public void channelInactive(ChannelHandlerContext ctx) throws Exception {61         System.out.println("channel inactive");62         super.channelInactive(ctx);63     }64 65     @Override66     public void channelUnregistered(ChannelHandlerContext ctx) throws Exception {67         System.out.println("channel unregistered");68         super.channelUnregistered(ctx);69     }70 }

 

Netty的http伺服器編程(三)