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 org.apache.commons.net.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(final String[] args)
34 {
35 final int index;
36 final String handle;
37 final String host;
38 InetAddress address = null;
39 final 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 (final 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 (final IOException e)
82 {
83 System.err.println("Error I/O exception: " + e.getMessage());
84 System.exit(1);
85 }
86 }
87
88 }