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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
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 }