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 in Java using NetComponents. The Java version is much shorter.
28 */
29 public final class fwhois {
30
31 public static void main(final String[] args) {
32 final int index;
33 final String handle;
34 final String host;
35 InetAddress address = null;
36 final WhoisClient whois;
37
38 if (args.length != 1) {
39 System.err.println("usage: fwhois handle[@<server>]");
40 System.exit(1);
41 }
42
43 index = args[0].lastIndexOf('@');
44
45 whois = new WhoisClient();
46 // We want to timeout if a response takes longer than 60 seconds
47 whois.setDefaultTimeout(60000);
48
49 if (index == -1) {
50 handle = args[0];
51 host = WhoisClient.DEFAULT_HOST;
52 } else {
53 handle = args[0].substring(0, index);
54 host = args[0].substring(index + 1);
55 }
56
57 try {
58 address = InetAddress.getByName(host);
59 System.out.println("[" + address.getHostName() + "]");
60 } catch (final UnknownHostException e) {
61 System.err.println("Error unknown host: " + e.getMessage());
62 System.exit(1);
63 }
64
65 try {
66 whois.connect(address);
67 System.out.print(whois.query(handle));
68 whois.disconnect();
69 } catch (final IOException e) {
70 System.err.println("Error I/O exception: " + e.getMessage());
71 System.exit(1);
72 }
73 }
74
75 }