NettyExample 1 构建简单的http服务

NettyExample 1 构建简单的http服务

netty 最新版本是netty-4.1.15.Final. 本来还有Netty5，但官网已经放弃5.0了，maven仓库倒是还有5.0的版本。下载netty-4.1.15.Final源码包，里面包含一个 netty-example-4.1.15.Final-sources.jar文件,提供了比较丰富的example例子。

Netty Http服务端代码实现

import com.mdq.HttpServerTest.netty.handler.HttpServerInboundHandler;

import com.mdq.HttpServerTest.netty.handler.TestInBoundHandler1;

import com.mdq.HttpServerTest.netty.handler.TestOutBoundHandler1;

import io.netty.bootstrap.ServerBootstrap;

import io.netty.channel.ChannelFuture;

import io.netty.channel.ChannelInitializer;

import io.netty.channel.ChannelOption;

import io.netty.channel.ChannelPipeline;

import io.netty.channel.EventLoopGroup;

import io.netty.channel.nio.NioEventLoopGroup;

import io.netty.channel.socket.SocketChannel;

import io.netty.channel.socket.nio.NioServerSocketChannel;

import io.netty.handler.codec.http.HttpObjectAggregator;

import io.netty.handler.codec.http.HttpRequestDecoder;

import io.netty.handler.codec.http.HttpResponseEncoder;

import io.netty.handler.codec.http.cors.CorsConfig;

import io.netty.handler.codec.http.cors.CorsConfigBuilder;

import io.netty.handler.codec.http.cors.CorsHandler;

import io.netty.handler.ssl.SslContext;

import io.netty.handler.ssl.SslContextBuilder;

import io.netty.handler.ssl.util.SelfSignedCertificate;

import io.netty.handler.stream.ChunkedWriteHandler;

public class NettyHttpServer {

     private static Logger log = LoggerFactory.getLogger(NettyHttpServer.class);

     static final boolean SSL = System.getProperty("ssl") != null;

     static final int PORT = Integer.parseInt(System.getProperty("port", SSL ? "8443" : "8080"));

     public void start(int port) throws Exception {

           // Configure SSL.

           final SslContext sslCtx;

           if (SSL) {

                SelfSignedCertificate ssc = new SelfSignedCertificate();

                sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey()).build();

           } else {

                sslCtx = null;

           }

           EventLoopGroup bossGroup = new NioEventLoopGroup();

           EventLoopGroup workerGroup = new NioEventLoopGroup();

           try {

                ServerBootstrap b = new ServerBootstrap();

                b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)

                         .childHandler(new HttpServerChannelInitializer(sslCtx))

                         .option(ChannelOption.SO_BACKLOG, 128)

                         .childOption(ChannelOption.SO_KEEPALIVE, true);

                ChannelFuture f = b.bind(port).sync();

                f.channel().closeFuture().sync();

           } finally {

                workerGroup.shutdownGracefully();

                bossGroup.shutdownGracefully();

           }

     }

     public class HttpServerChannelInitializer extends ChannelInitializer<SocketChannel> {

           private final SslContext sslCtx;

           public HttpServerChannelInitializer(SslContext sslCtx) {

                this.sslCtx = sslCtx;

           }

           @Override

           public void initChannel(SocketChannel ch) {

                CorsConfig corsConfig = CorsConfigBuilder.forAnyOrigin().allowNullOrigin().allowCredentials().build();

                ChannelPipeline pipeline = ch.pipeline();

                if (sslCtx != null) {

                     pipeline.addLast(sslCtx.newHandler(ch.alloc()));