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1 package examples; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache Commons" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import java.io.IOException; 58 import java.net.InetAddress; 59 import java.net.UnknownHostException; 60 import org.apache.commons.net.WhoisClient; 61 62 /**** 63 * This is an example of how you would implement the Linux fwhois command 64 * in Java using NetComponents. The Java version is much shorter. 65 * <p> 66 ***/ 67 public final class fwhois 68 { 69 70 public static final void main(String[] args) 71 { 72 int index; 73 String handle, host; 74 InetAddress address = null; 75 WhoisClient whois; 76 77 if (args.length != 1) 78 { 79 System.err.println("usage: fwhois handle[@<server>]"); 80 System.exit(1); 81 } 82 83 index = args[0].lastIndexOf("@"); 84 85 whois = new WhoisClient(); 86 // We want to timeout if a response takes longer than 60 seconds 87 whois.setDefaultTimeout(60000); 88 89 if (index == -1) 90 { 91 handle = args[0]; 92 host = WhoisClient.DEFAULT_HOST; 93 } 94 else 95 { 96 handle = args[0].substring(0, index); 97 host = args[0].substring(index + 1); 98 } 99 100 try 101 { 102 address = InetAddress.getByName(host); 103 } 104 catch (UnknownHostException e) 105 { 106 System.err.println("Error unknown host: " + e.getMessage()); 107 System.exit(1); 108 } 109 110 System.out.println("[" + address.getHostName() + "]"); 111 112 try 113 { 114 whois.connect(address); 115 System.out.print(whois.query(handle)); 116 whois.disconnect(); 117 } 118 catch (IOException e) 119 { 120 System.err.println("Error I/O exception: " + e.getMessage()); 121 System.exit(1); 122 } 123 } 124 125 }

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