001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package examples;
019
020import java.io.IOException;
021import java.net.InetAddress;
022import java.net.UnknownHostException;
023
024import org.apache.commons.net.whois.WhoisClient;
025
026/***
027 * This is an example of how you would implement the Linux fwhois command
028 * in Java using NetComponents.  The Java version is much shorter.
029 * <p>
030 ***/
031public final class fwhois
032{
033
034    public static final void main(String[] args)
035    {
036        int index;
037        String handle, host;
038        InetAddress address = null;
039        WhoisClient whois;
040
041        if (args.length != 1)
042        {
043            System.err.println("usage: fwhois handle[@<server>]");
044            System.exit(1);
045        }
046
047        index = args[0].lastIndexOf("@");
048
049        whois = new WhoisClient();
050        // We want to timeout if a response takes longer than 60 seconds
051        whois.setDefaultTimeout(60000);
052
053        if (index == -1)
054        {
055            handle = args[0];
056            host = WhoisClient.DEFAULT_HOST;
057        }
058        else
059        {
060            handle = args[0].substring(0, index);
061            host = args[0].substring(index + 1);
062        }
063
064        try
065        {
066            address = InetAddress.getByName(host);
067        }
068        catch (UnknownHostException e)
069        {
070            System.err.println("Error unknown host: " + e.getMessage());
071            System.exit(1);
072        }
073
074        System.out.println("[" + address.getHostName() + "]");
075
076        try
077        {
078            whois.connect(address);
079            System.out.print(whois.query(handle));
080            whois.disconnect();
081        }
082        catch (IOException e)
083        {
084            System.err.println("Error I/O exception: " + e.getMessage());
085            System.exit(1);
086        }
087    }
088
089}