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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package examples.unix;
19  
20  import java.io.IOException;
21  import java.net.InetAddress;
22  import java.net.UnknownHostException;
23  
24  import org.apache.commons.net.whois.WhoisClient;
25  
26  /***
27   * This is an example of how you would implement the Linux fwhois command
28   * in Java using NetComponents.  The Java version is much shorter.
29   * <p>
30   ***/
31  public final class fwhois
32  {
33  
34      public static void main(String[] args)
35      {
36          int index;
37          String handle, host;
38          InetAddress address = null;
39          WhoisClient whois;
40  
41          if (args.length != 1)
42          {
43              System.err.println("usage: fwhois handle[@<server>]");
44              System.exit(1);
45          }
46  
47          index = args[0].lastIndexOf("@");
48  
49          whois = new WhoisClient();
50          // We want to timeout if a response takes longer than 60 seconds
51          whois.setDefaultTimeout(60000);
52  
53          if (index == -1)
54          {
55              handle = args[0];
56              host = WhoisClient.DEFAULT_HOST;
57          }
58          else
59          {
60              handle = args[0].substring(0, index);
61              host = args[0].substring(index + 1);
62          }
63  
64          try
65          {
66              address = InetAddress.getByName(host);
67              System.out.println("[" + address.getHostName() + "]");
68          }
69          catch (UnknownHostException e)
70          {
71              System.err.println("Error unknown host: " + e.getMessage());
72              System.exit(1);
73          }
74  
75          try
76          {
77              whois.connect(address);
78              System.out.print(whois.query(handle));
79              whois.disconnect();
80          }
81          catch (IOException e)
82          {
83              System.err.println("Error I/O exception: " + e.getMessage());
84              System.exit(1);
85          }
86      }
87  
88  }