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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.MultiThreadIoEventLoopGroup;
22  import io.netty.channel.nio.NioIoHandler;
23  import io.netty.channel.socket.nio.NioServerSocketChannel;
24  import io.netty.handler.logging.LogLevel;
25  import io.netty.handler.logging.LoggingHandler;
26  
27  public final class HexDumpProxy {
28  
29      static final int LOCAL_PORT = Integer.parseInt(System.getProperty("localPort", "8443"));
30      static final String REMOTE_HOST = System.getProperty("remoteHost", "www.google.com");
31      static final int REMOTE_PORT = Integer.parseInt(System.getProperty("remotePort", "443"));
32  
33      public static void main(String[] args) throws Exception {
34          System.err.println("Proxying *:" + LOCAL_PORT + " to " + REMOTE_HOST + ':' + REMOTE_PORT + " ...");
35  
36          // Configure the bootstrap.
37          EventLoopGroup bossGroup = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
38          EventLoopGroup workerGroup = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
39          try {
40              ServerBootstrap b = new ServerBootstrap();
41              b.group(bossGroup, workerGroup)
42               .channel(NioServerSocketChannel.class)
43               .handler(new LoggingHandler(LogLevel.INFO))
44               .childHandler(new HexDumpProxyInitializer(REMOTE_HOST, REMOTE_PORT))
45               .childOption(ChannelOption.AUTO_READ, false)
46               .bind(LOCAL_PORT).sync().channel().closeFuture().sync();
47          } finally {
48              bossGroup.shutdownGracefully();
49              workerGroup.shutdownGracefully();
50          }
51      }
52  }