netty代理http&https请求

（1）关键代码

package test;

import java.security.cert.CertificateException;

import javax.net.ssl.SSLException;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.SelfSignedCertificate;

public class ProxyServer {
    public static void main(String[] args) throws InterruptedException, CertificateException, SSLException {
        boolean SSL = false;//System.getProperty("ssl") != null;
        int PORT = Integer.parseInt(System.getProperty("port", SSL? "5688" : "8080"));

         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 workGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workGroup).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 128)
                    .childOption(ChannelOption.SO_KEEPALIVE, true).option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 6000)
                    .childHandler(new ProxyServiceInit(sslCtx));

            ChannelFuture f = b.bind(PORT).sync();
            System.out.println("端口号："+PORT);
            f.channel().closeFuture().sync();
        } finally {
            workGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }
}

package test;

import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.ssl.SslContext;

public class ProxyServiceInit extends ChannelInitializer<Channel> {
    private final SslContext sslCtx;

    public ProxyServiceInit(SslContext sslCtx) {
        this.sslCtx = sslCtx;
    }

    @Override
    protected void initChannel(Channel channel) throws Exception {
        ChannelPipeline p = channel.pipeline();
        System.out.println("ProxyServiceInit");
        if (sslCtx != null) {
            p.addLast(sslCtx.newHandler(channel.alloc()));
        }
        p.addLast("httpcode", new HttpServerCodec());
        p.addLast("httpservice", new HttpService());

    }
}

package test;

import java.security.cert.CertificateException;

import javax.net.ssl.SSLException;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.SelfSignedCertificate;

public class ProxyServer {
    public static void main(String[] args) throws InterruptedException, CertificateException, SSLException {
        boolean SSL = false;//System.getProperty("ssl") != null;
        int PORT = Integer.parseInt(System.getProperty("port", SSL? "5688" : "8080"));

         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 workGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workGroup).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 128)
                    .childOption(ChannelOption.SO_KEEPALIVE, true).option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 6000)
                    .childHandler(new ProxyServiceInit(sslCtx));

            ChannelFuture f = b.bind(PORT).sync();
            System.out.println("端口号："+PORT);
            f.channel().closeFuture().sync();
        } finally {
            workGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }
}