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