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1   /*
2    * Copyright 2009 Red Hat, Inc.
3    *
4    * Red Hat licenses this file to you under the Apache License, version 2.0
5    * (the "License"); you may not use this file except in compliance with the
6    * License.  You may obtain a copy of the License at:
7    *
8    *    http://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 org.jboss.netty.example.http.tunnel;
17  
18  import java.io.BufferedReader;
19  import java.io.InputStreamReader;
20  import java.net.InetSocketAddress;
21  import java.net.URI;
22  import java.util.concurrent.Executors;
23  
24  import org.jboss.netty.bootstrap.ClientBootstrap;
25  import org.jboss.netty.channel.ChannelFuture;
26  import org.jboss.netty.channel.ChannelPipeline;
27  import org.jboss.netty.channel.ChannelPipelineFactory;
28  import org.jboss.netty.channel.Channels;
29  import org.jboss.netty.channel.socket.http.HttpTunnelingClientSocketChannelFactory;
30  import org.jboss.netty.channel.socket.oio.OioClientSocketChannelFactory;
31  import org.jboss.netty.example.securechat.SecureChatSslContextFactory;
32  import org.jboss.netty.handler.codec.string.StringDecoder;
33  import org.jboss.netty.handler.codec.string.StringEncoder;
34  import org.jboss.netty.handler.logging.LoggingHandler;
35  import org.jboss.netty.logging.InternalLogLevel;
36  
37  /**
38   * An HTTP tunneled version of the telnet client example.  Please refer to the
39   * API documentation of the <tt>org.jboss.netty.channel.socket.http</tt> package
40   * for the detailed instruction on how to deploy the server-side HTTP tunnel in
41   * your Servlet container.
42   *
43   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
44   * @author Andy Taylor (andy.taylor@jboss.org)
45   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
46   */
47  public class HttpTunnelingClientExample {
48  
49      public static void main(String[] args) throws Exception {
50          if (args.length != 1) {
51              System.err.println(
52                      "Usage: " + HttpTunnelingClientExample.class.getSimpleName() +
53                      " <URL>");
54              System.err.println(
55                      "Example: " + HttpTunnelingClientExample.class.getSimpleName() +
56                      " http://localhost:8080/netty-tunnel");
57              return;
58          }
59  
60          URI uri = new URI(args[0]);
61          String scheme = uri.getScheme() == null? "http" : uri.getScheme();
62  
63          // Configure the client.
64          ClientBootstrap b = new ClientBootstrap(
65                  new HttpTunnelingClientSocketChannelFactory(
66                          new OioClientSocketChannelFactory(Executors.newCachedThreadPool())));
67  
68          b.setPipelineFactory(new ChannelPipelineFactory() {
69              public ChannelPipeline getPipeline() throws Exception {
70                  return Channels.pipeline(
71                          new StringDecoder(),
72                          new StringEncoder(),
73                          new LoggingHandler(InternalLogLevel.INFO));
74              }
75          });
76  
77          // Set additional options required by the HTTP tunneling transport.
78          b.setOption("serverName", uri.getHost());
79          b.setOption("serverPath", uri.getRawPath());
80  
81          // Configure SSL if necessary
82          if (scheme.equals("https")) {
83              b.setOption("sslContext", SecureChatSslContextFactory.getClientContext());
84          } else if (!scheme.equals("http")) {
85              // Only HTTP and HTTPS are supported.
86              System.err.println("Only HTTP(S) is supported.");
87              return;
88          }
89  
90          // Make the connection attempt.
91          ChannelFuture channelFuture = b.connect(
92                  new InetSocketAddress(uri.getHost(), uri.getPort()));
93          channelFuture.awaitUninterruptibly();
94  
95          // Read commands from the stdin.
96          System.out.println("Enter text ('quit' to exit)");
97          ChannelFuture lastWriteFuture = null;
98          BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
99          for (; ;) {
100             String line = in.readLine();
101             if (line == null || "quit".equalsIgnoreCase(line)) {
102                 break;
103             }
104 
105             // Sends the received line to the server.
106             lastWriteFuture = channelFuture.getChannel().write(line);
107         }
108 
109         // Wait until all messages are flushed before closing the channel.
110         if (lastWriteFuture != null) {
111             lastWriteFuture.awaitUninterruptibly();
112         }
113 
114         channelFuture.getChannel().close();
115         // Wait until the connection is closed or the connection attempt fails.
116         channelFuture.getChannel().getCloseFuture().awaitUninterruptibly();
117 
118         // Shut down all threads.
119         b.releaseExternalResources();
120     }
121 }