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    
018    package examples;
019    
020    import java.io.IOException;
021    import java.net.InetAddress;
022    import java.net.UnknownHostException;
023    
024    import 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     ***/
031    public 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    }