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 package examples;
18
19 import java.io.IOException;
20 import java.net.InetAddress;
21 import java.net.UnknownHostException;
22 import org.apache.commons.net.WhoisClient;
23
24 /***
25 * This is an example of how you would implement the Linux fwhois command
26 * in Java using NetComponents. The Java version is much shorter.
27 * <p>
28 ***/
29 public final class fwhois
30 {
31
32 public static final void main(String[] args)
33 {
34 int index;
35 String handle, host;
36 InetAddress address = null;
37 WhoisClient whois;
38
39 if (args.length != 1)
40 {
41 System.err.println("usage: fwhois handle[@<server>]");
42 System.exit(1);
43 }
44
45 index = args[0].lastIndexOf("@");
46
47 whois = new WhoisClient();
48 // We want to timeout if a response takes longer than 60 seconds
49 whois.setDefaultTimeout(60000);
50
51 if (index == -1)
52 {
53 handle = args[0];
54 host = WhoisClient.DEFAULT_HOST;
55 }
56 else
57 {
58 handle = args[0].substring(0, index);
59 host = args[0].substring(index + 1);
60 }
61
62 try
63 {
64 address = InetAddress.getByName(host);
65 }
66 catch (UnknownHostException e)
67 {
68 System.err.println("Error unknown host: " + e.getMessage());
69 System.exit(1);
70 }
71
72 System.out.println("[" + address.getHostName() + "]");
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 }