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1   /*******************************************************************************
2    * Copyright (c) 2011 Michael Mimo Moratti.
3    *
4    * Michael Mimo Moratti 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 License.
6    * You may obtain a copy of the License at:
7    *     http://www.apache.org/licenses/LICENSE-2.0
8    * Unless required by applicable law or agreed to in writing, software
9    * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
10   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
11   * License for the specific language governing permissions and limitations
12   * under the License.
13   *******************************************************************************/
14  package ch.mimo.netty.example.icap.preview;
15  
16  import java.net.InetSocketAddress;
17  import java.util.concurrent.Executors;
18  
19  import org.jboss.netty.bootstrap.ClientBootstrap;
20  import org.jboss.netty.buffer.ChannelBuffers;
21  import org.jboss.netty.channel.Channel;
22  import org.jboss.netty.channel.ChannelFuture;
23  import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
24  import org.jboss.netty.handler.codec.http.DefaultHttpRequest;
25  import org.jboss.netty.handler.codec.http.HttpHeaders;
26  import org.jboss.netty.handler.codec.http.HttpMethod;
27  import org.jboss.netty.handler.codec.http.HttpRequest;
28  import org.jboss.netty.handler.codec.http.HttpVersion;
29  
30  import ch.mimo.netty.handler.codec.icap.DefaultIcapChunk;
31  import ch.mimo.netty.handler.codec.icap.DefaultIcapChunkTrailer;
32  import ch.mimo.netty.handler.codec.icap.DefaultIcapRequest;
33  import ch.mimo.netty.handler.codec.icap.IcapChunk;
34  import ch.mimo.netty.handler.codec.icap.IcapChunkTrailer;
35  import ch.mimo.netty.handler.codec.icap.IcapHeaders;
36  import ch.mimo.netty.handler.codec.icap.IcapMessageElementEnum;
37  import ch.mimo.netty.handler.codec.icap.IcapMethod;
38  import ch.mimo.netty.handler.codec.icap.IcapRequest;
39  import ch.mimo.netty.handler.codec.icap.IcapVersion;
40  
41  /**
42   * Preview capable ICAP client that send a REQMOD request with a HTTP POST request and body as preview
43   * to a server and prints the answer, waits for a 10 continue and sends the rest.
44   * 
45   * @author Michael Mimo Moratti (mimo@mimo.ch)
46   *
47   */
48  public class IcapClient {
49  	public static void main(String[] args) {
50  		int port = 8099;
51  		String host = "localhost";
52  		
53          // Configure the client.
54          ClientBootstrap bootstrap = new ClientBootstrap(
55                  new NioClientSocketChannelFactory(
56                          Executors.newCachedThreadPool(),
57                          Executors.newCachedThreadPool()));
58          
59          // Set up the event pipeline factory.
60          bootstrap.setPipelineFactory(new IcapClientChannelPipeline());
61  
62          // Start the connection attempt.
63          ChannelFuture future = bootstrap.connect(new InetSocketAddress(host,port));
64  
65          // Wait until the connection attempt succeeds or fails.
66          Channel channel = future.awaitUninterruptibly().getChannel();
67          if (!future.isSuccess()) {
68              future.getCause().printStackTrace();
69              bootstrap.releaseExternalResources();
70              return;
71          }
72  
73          // Prepare the ICAP request.
74          IcapRequest request = new DefaultIcapRequest(IcapVersion.ICAP_1_0,IcapMethod.REQMOD,"/simple","localhost");
75          request.setBody(IcapMessageElementEnum.REQBODY);
76          request.addHeader(IcapHeaders.Names.PREVIEW,"50");
77          HttpRequest httpRequest = new DefaultHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.POST,"/some/servers/uri");
78          httpRequest.setHeader(HttpHeaders.Names.HOST,host);
79          httpRequest.setHeader(HttpHeaders.Names.CONNECTION, HttpHeaders.Values.CLOSE);
80          httpRequest.setHeader(HttpHeaders.Names.ACCEPT_ENCODING, HttpHeaders.Values.GZIP);
81          request.setHttpRequest(httpRequest);
82          
83          IcapChunk previewChunk = new DefaultIcapChunk(ChannelBuffers.copiedBuffer("It is common not to understand why something happe".getBytes()));
84          previewChunk.setPreviewChunk(true);
85          IcapChunkTrailer previewTrailer = new DefaultIcapChunkTrailer(true,false);
86          
87          // Send the ICAP request.
88          channel.write(request);
89          channel.write(previewChunk);
90          channel.write(previewTrailer);
91       
92          // Wait for the server to close the connection.
93          channel.getCloseFuture().awaitUninterruptibly();
94  
95          // Shut down executor threads to exit.
96          bootstrap.releaseExternalResources();
97  }
98  }