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1   /*
2    * Copyright 2012 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.example.proxy;
17  
18  import io.netty.bootstrap.ServerBootstrap;
19  import io.netty.channel.ChannelOption;
20  import io.netty.channel.EventLoopGroup;
21  import io.netty.channel.nio.NioEventLoopGroup;
22  import io.netty.channel.socket.nio.NioServerSocketChannel;
23  import io.netty.handler.logging.LogLevel;
24  import io.netty.handler.logging.LoggingHandler;
25  
26  public final class HexDumpProxy {
27  
28      static final int LOCAL_PORT = Integer.parseInt(System.getProperty("localPort", "8443"));
29      static final String REMOTE_HOST = System.getProperty("remoteHost", "www.google.com");
30      static final int REMOTE_PORT = Integer.parseInt(System.getProperty("remotePort", "443"));
31  
32      public static void main(String[] args) throws Exception {
33          System.err.println("Proxying *:" + LOCAL_PORT + " to " + REMOTE_HOST + ':' + REMOTE_PORT + " ...");
34  
35          // Configure the bootstrap.
36          EventLoopGroup bossGroup = new NioEventLoopGroup(1);
37          EventLoopGroup workerGroup = new NioEventLoopGroup();
38          try {
39              ServerBootstrap b = new ServerBootstrap();
40              b.group(bossGroup, workerGroup)
41               .channel(NioServerSocketChannel.class)
42               .handler(new LoggingHandler(LogLevel.INFO))
43               .childHandler(new HexDumpProxyInitializer(REMOTE_HOST, REMOTE_PORT))
44               .childOption(ChannelOption.AUTO_READ, false)
45               .bind(LOCAL_PORT).sync().channel().closeFuture().sync();
46          } finally {
47              bossGroup.shutdownGracefully();
48              workerGroup.shutdownGracefully();
49          }
50      }
51  }