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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.FingerClient; 61 62 /**** 63 * This is an example of how you would implement the finger command 64 * in Java using NetComponents. The Java version is much shorter. 65 * But keep in mind that the Unix finger command reads all sorts of 66 * local files to output local finger information. This program only 67 * queries the finger daemon. 68 * <p> 69 * The -l flag is used to request long output from the server. 70 * <p> 71 ***/ 72 public final class finger 73 { 74 75 public static final void main(String[] args) 76 { 77 boolean longOutput = false; 78 int arg = 0, index; 79 String handle, host; 80 FingerClient finger; 81 InetAddress address = null; 82 83 // Get flags. If an invalid flag is present, exit with usage message. 84 while (arg < args.length && args[arg].startsWith("-")) 85 { 86 if (args[arg].equals("-l")) 87 longOutput = true; 88 else 89 { 90 System.err.println("usage: finger [-l] [[[handle][@<server>]] ...]"); 91 System.exit(1); 92 } 93 ++arg; 94 } 95 96 97 finger = new FingerClient(); 98 // We want to timeout if a response takes longer than 60 seconds 99 finger.setDefaultTimeout(60000); 100 101 if (arg >= args.length) 102 { 103 // Finger local host 104 105 try 106 { 107 address = InetAddress.getLocalHost(); 108 } 109 catch (UnknownHostException e) 110 { 111 System.err.println("Error unknown host: " + e.getMessage()); 112 System.exit(1); 113 } 114 115 try 116 { 117 finger.connect(address); 118 System.out.print(finger.query(longOutput)); 119 finger.disconnect(); 120 } 121 catch (IOException e) 122 { 123 System.err.println("Error I/O exception: " + e.getMessage()); 124 System.exit(1); 125 } 126 127 return ; 128 } 129 130 // Finger each argument 131 while (arg < args.length) 132 { 133 134 index = args[arg].lastIndexOf("@"); 135 136 if (index == -1) 137 { 138 handle = args[arg]; 139 try 140 { 141 address = InetAddress.getLocalHost(); 142 } 143 catch (UnknownHostException e) 144 { 145 System.err.println("Error unknown host: " + e.getMessage()); 146 System.exit(1); 147 } 148 } 149 else 150 { 151 handle = args[arg].substring(0, index); 152 host = args[arg].substring(index + 1); 153 154 try 155 { 156 address = InetAddress.getByName(host); 157 } 158 catch (UnknownHostException e) 159 { 160 System.err.println("Error unknown host: " + e.getMessage()); 161 System.exit(1); 162 } 163 } 164 165 System.out.println("[" + address.getHostName() + "]"); 166 167 try 168 { 169 finger.connect(address); 170 System.out.print(finger.query(longOutput, handle)); 171 finger.disconnect(); 172 } 173 catch (IOException e) 174 { 175 System.err.println("Error I/O exception: " + e.getMessage()); 176 System.exit(1); 177 } 178 179 ++arg; 180 if (arg != args.length) 181 System.out.print("\n"); 182 } 183 } 184 } 185

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