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    1   package examples;
    2
    3   /* ====================================================================
    4    * The Apache Software License, Version 1.1
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    9    * Redistribution and use in source and binary forms, with or without
    10   * modification, are permitted provided that the following conditions
    11   * are met:
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    14   *    notice, this list of conditions and the following disclaimer.
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    21   * 3. The end-user documentation included with the redistribution,
    22   *    if any, must include the following acknowledgment:
    23   *       "This product includes software developed by the
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    25   *    Alternately, this acknowledgment may appear in the software itself,
    26   *    if and wherever such third-party acknowledgments normally appear.
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    28   * 4. The names "Apache" and "Apache Software Foundation" and
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    33   * 5. Products derived from this software may not be called "Apache",
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    56
    57  import java.io.IOException;
    58  import java.net.InetAddress;
    59  import java.net.UnknownHostException;
    60  import org.apache.commons.net.WhoisClient;
    61
    62  /****
    63   * This is an example of how you would implement the Linux fwhois command
    64   * in Java using NetComponents.  The Java version is much shorter.
    65   * <p>
    66   ***/
    67  public final class fwhois
    68  {
    69
    70      public static final void main(String[] args)
    71      {
    72          int index;
    73          String handle, host;
    74          InetAddress address = null;
    75          WhoisClient whois;
    76
    77          if (args.length != 1)
    78          {
    79              System.err.println("usage: fwhois handle[@<server>]");
    80              System.exit(1);
    81          }
    82
    83          index = args[0].lastIndexOf("@");
    84
    85          whois = new WhoisClient();
    86          // We want to timeout if a response takes longer than 60 seconds
    87          whois.setDefaultTimeout(60000);
    88
    89          if (index == -1)
    90          {
    91              handle = args[0];
    92              host = WhoisClient.DEFAULT_HOST;
    93          }
    94          else
    95          {
    96              handle = args[0].substring(0, index);
    97              host = args[0].substring(index + 1);
    98          }
    99
    100         try
    101         {
    102             address = InetAddress.getByName(host);
    103         }
    104         catch (UnknownHostException e)
    105         {
    106             System.err.println("Error unknown host: " + e.getMessage());
    107             System.exit(1);
    108         }
    109
    110         System.out.println("[" + address.getHostName() + "]");
    111
    112         try
    113         {
    114             whois.connect(address);
    115             System.out.print(whois.query(handle));
    116             whois.disconnect();
    117         }
    118         catch (IOException e)
    119         {
    120             System.err.println("Error I/O exception: " + e.getMessage());
    121             System.exit(1);
    122         }
    123     }
    124
    125 }

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