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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   ***/
30  public final class fwhois
31  {
32  
33      public static void main(String[] args)
34      {
35          int index;
36          String handle, host;
37          InetAddress address = null;
38          WhoisClient whois;
39  
40          if (args.length != 1)
41          {
42              System.err.println("usage: fwhois handle[@<server>]");
43              System.exit(1);
44          }
45  
46          index = args[0].lastIndexOf("@");
47  
48          whois = new WhoisClient();
49          // We want to timeout if a response takes longer than 60 seconds
50          whois.setDefaultTimeout(60000);
51  
52          if (index == -1)
53          {
54              handle = args[0];
55              host = WhoisClient.DEFAULT_HOST;
56          }
57          else
58          {
59              handle = args[0].substring(0, index);
60              host = args[0].substring(index + 1);
61          }
62  
63          try
64          {
65              address = InetAddress.getByName(host);
66              System.out.println("[" + address.getHostName() + "]");
67          }
68          catch (UnknownHostException e)
69          {
70              System.err.println("Error unknown host: " + e.getMessage());
71              System.exit(1);
72          }
73  
74          try
75          {
76              whois.connect(address);
77              System.out.print(whois.query(handle));
78              whois.disconnect();
79          }
80          catch (IOException e)
81          {
82              System.err.println("Error I/O exception: " + e.getMessage());
83              System.exit(1);
84          }
85      }
86  
87  }