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1   /*
2    * Copyright 2001-2005 The Apache Software Foundation
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * 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,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package examples;
17  
18  import java.io.IOException;
19  import java.net.InetAddress;
20  import java.net.UnknownHostException;
21  import org.apache.commons.net.WhoisClient;
22  
23  /***
24   * This is an example of how you would implement the Linux fwhois command
25   * in Java using NetComponents.  The Java version is much shorter.
26   * <p>
27   ***/
28  public final class fwhois
29  {
30  
31      public static final void main(String[] args)
32      {
33          int index;
34          String handle, host;
35          InetAddress address = null;
36          WhoisClient whois;
37  
38          if (args.length != 1)
39          {
40              System.err.println("usage: fwhois handle[@<server>]");
41              System.exit(1);
42          }
43  
44          index = args[0].lastIndexOf("@");
45  
46          whois = new WhoisClient();
47          // We want to timeout if a response takes longer than 60 seconds
48          whois.setDefaultTimeout(60000);
49  
50          if (index == -1)
51          {
52              handle = args[0];
53              host = WhoisClient.DEFAULT_HOST;
54          }
55          else
56          {
57              handle = args[0].substring(0, index);
58              host = args[0].substring(index + 1);
59          }
60  
61          try
62          {
63              address = InetAddress.getByName(host);
64          }
65          catch (UnknownHostException e)
66          {
67              System.err.println("Error unknown host: " + e.getMessage());
68              System.exit(1);
69          }
70  
71          System.out.println("[" + address.getHostName() + "]");
72  
73          try
74          {
75              whois.connect(address);
76              System.out.print(whois.query(handle));
77              whois.disconnect();
78          }
79          catch (IOException e)
80          {
81              System.err.println("Error I/O exception: " + e.getMessage());
82              System.exit(1);
83          }
84      }
85  
86  }