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 }