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
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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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