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examples.fwhois |
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1 | /* |
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2 | * Copyright 2001-2005 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package examples; |
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17 | ||
18 | import java.io.IOException; |
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19 | import java.net.InetAddress; |
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20 | import java.net.UnknownHostException; |
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21 | import org.apache.commons.net.WhoisClient; |
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22 | ||
23 | /*** |
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24 | * This is an example of how you would implement the Linux fwhois command |
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25 | * in Java using NetComponents. The Java version is much shorter. |
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26 | * <p> |
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27 | ***/ |
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28 | 0 | public final class fwhois |
29 | { |
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30 | ||
31 | public static final void main(String[] args) |
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32 | { |
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33 | int index; |
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34 | String handle, host; |
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35 | 0 | InetAddress address = null; |
36 | WhoisClient whois; |
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37 | ||
38 | 0 | if (args.length != 1) |
39 | { |
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40 | 0 | System.err.println("usage: fwhois handle[@<server>]"); |
41 | 0 | System.exit(1); |
42 | } |
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43 | ||
44 | 0 | index = args[0].lastIndexOf("@"); |
45 | ||
46 | 0 | whois = new WhoisClient(); |
47 | // We want to timeout if a response takes longer than 60 seconds |
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48 | 0 | whois.setDefaultTimeout(60000); |
49 | ||
50 | 0 | if (index == -1) |
51 | { |
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52 | 0 | handle = args[0]; |
53 | 0 | host = WhoisClient.DEFAULT_HOST; |
54 | } |
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55 | else |
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56 | { |
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57 | 0 | handle = args[0].substring(0, index); |
58 | 0 | host = args[0].substring(index + 1); |
59 | } |
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60 | ||
61 | try |
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62 | { |
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63 | 0 | address = InetAddress.getByName(host); |
64 | } |
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65 | 0 | catch (UnknownHostException e) |
66 | { |
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67 | 0 | System.err.println("Error unknown host: " + e.getMessage()); |
68 | 0 | System.exit(1); |
69 | 0 | } |
70 | ||
71 | 0 | System.out.println("[" + address.getHostName() + "]"); |
72 | ||
73 | try |
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74 | { |
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75 | 0 | whois.connect(address); |
76 | 0 | System.out.print(whois.query(handle)); |
77 | 0 | whois.disconnect(); |
78 | } |
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79 | 0 | catch (IOException e) |
80 | { |
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81 | 0 | System.err.println("Error I/O exception: " + e.getMessage()); |
82 | 0 | System.exit(1); |
83 | 0 | } |
84 | 0 | } |
85 | ||
86 | } |
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