netty-http服务demo

服务端

        NioEventLoopGroup bossGroup = new NioEventLoopGroup(1);
        NioEventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap
                    .group(bossGroup,workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new TestServerInitializer());
            ChannelFuture channelFuture = bootstrap
                    .bind(12345).sync();
            channelFuture.channel().closeFuture().sync();
        }finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

通道初始化对象

public class TestServerInitializer extends ChannelInitializer<SocketChannel> {
    @Override
    protected void initChannel(SocketChannel socketChannel) throws Exception {
        //向管道加入处理器
        //得到管道
        ChannelPipeline pipeline = socketChannel.pipeline();
        //加入一个netty提供的httpServerCodec（code，decoder的缩写）
        //HttpServerCodec是netty提供的处理http的编解码器
        pipeline.addLast("myCodec",new HttpServerCodec());
        //增加一个自定义的处理器
        pipeline.addLast("myServerHandler",new TestServerHandler());
    }
}

控制器

//SimpleChannelInboundHandler是ChannelInboundHandlerAdapter的子类
//HttpObject 客户端和服务器端相互通信的数据被封装成HttpObject
public class TestServerHandler extends SimpleChannelInboundHandler<HttpObject> {
    //读取客户端数据
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
        //判断msg是不是一个HttpRequest
        if (msg instanceof HttpRequest){
            System.out.println("msg类型："+msg.getClass());
            System.out.println("客户端地址："+ctx.channel().remoteAddress());
            
            //过滤请求
            HttpRequest httpRequest = (HttpRequest) msg;
            //获取uri
            URI uri = new URI(httpRequest.uri());
            if ("/favicon.ico".equals(uri.getPath())){
                System.out.println("此资源不做响应...");    
                return;
            }

            //回复信息给浏览器(http协议)
            ByteBuf content = Unpooled.copiedBuffer("hello,我是服务器", CharsetUtil.UTF_16);
            //构造一个http的响应，即httpResponse
            DefaultFullHttpResponse response =
                    new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK, content);//指定协议版本的状态码
            response.headers().set(HttpHeaderNames.CONTENT_TYPE,"text/plain");
            response.headers().set(HttpHeaderNames.CONTENT_LENGTH,content.readableBytes());
            //将构建好的response返回
            ctx.writeAndFlush(response);
        }
    }
}