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 org.apache.commons.net.examples.unix;
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 in Java using NetComponents. The Java version is much shorter.
028 */
029public final class fwhois {
030
031    public static void main(final String[] args) {
032        final int index;
033        final String handle;
034        final String host;
035        InetAddress address = null;
036        final WhoisClient whois;
037
038        if (args.length != 1) {
039            System.err.println("usage: fwhois handle[@<server>]");
040            System.exit(1);
041        }
042
043        index = args[0].lastIndexOf('@');
044
045        whois = new WhoisClient();
046        // We want to timeout if a response takes longer than 60 seconds
047        whois.setDefaultTimeout(60000);
048
049        if (index == -1) {
050            handle = args[0];
051            host = WhoisClient.DEFAULT_HOST;
052        } else {
053            handle = args[0].substring(0, index);
054            host = args[0].substring(index + 1);
055        }
056
057        try {
058            address = InetAddress.getByName(host);
059            System.out.println("[" + address.getHostName() + "]");
060        } catch (final UnknownHostException e) {
061            System.err.println("Error unknown host: " + e.getMessage());
062            System.exit(1);
063        }
064
065        try {
066            whois.connect(address);
067            System.out.print(whois.query(handle));
068            whois.disconnect();
069        } catch (final IOException e) {
070            System.err.println("Error I/O exception: " + e.getMessage());
071            System.exit(1);
072        }
073    }
074
075}