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,
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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.BufferedReader;
58 import java.io.IOException;
59 import java.io.Reader;
60 import org.apache.commons.net.pop3.POP3Client;
61 import org.apache.commons.net.pop3.POP3MessageInfo;
62
63 /****
64 * This is an example program demonstrating how to use the POP3Client class.
65 * This program connects to a POP3 server and retrieves the message
66 * headers of all the messages, printing the From: and Subject: header
67 * entries for each message.
68 * <p>
69 * Usage: messages <pop3 server hostname> <username> <password>
70 * <p>
71 ***/
72 public final class messages
73 {
74
75 public static final void printMessageInfo(BufferedReader reader, int id)
76 throws IOException
77 {
78 String line, lower, from, subject;
79
80 from = "";
81 subject = "";
82
83 while ((line = reader.readLine()) != null)
84 {
85 lower = line.toLowerCase();
86 if (lower.startsWith("from: "))
87 from = line.substring(6).trim();
88 else if (lower.startsWith("subject: "))
89 subject = line.substring(9).trim();
90 }
91
92 System.out.println(Integer.toString(id) + " From: " + from +
93 " Subject: " + subject);
94 }
95
96 public static final void main(String[] args)
97 {
98 int message;
99 String server, username, password;
100 POP3Client pop3;
101 Reader reader;
102 POP3MessageInfo[] messages;
103
104 if (args.length < 3)
105 {
106 System.err.println(
107 "Usage: messages <pop3 server hostname> <username> <password>");
108 System.exit(1);
109 }
110
111 server = args[0];
112 username = args[1];
113 password = args[2];
114
115 pop3 = new POP3Client();
116 // We want to timeout if a response takes longer than 60 seconds
117 pop3.setDefaultTimeout(60000);
118
119 try
120 {
121 pop3.connect(server);
122 }
123 catch (IOException e)
124 {
125 System.err.println("Could not connect to server.");
126 e.printStackTrace();
127 System.exit(1);
128 }
129
130 try
131 {
132 if (!pop3.login(username, password))
133 {
134 System.err.println("Could not login to server. Check password.");
135 pop3.disconnect();
136 System.exit(1);
137 }
138
139 messages = pop3.listMessages();
140
141 if (messages == null)
142 {
143 System.err.println("Could not retrieve message list.");
144 pop3.disconnect();
145 System.exit(1);
146 }
147 else if (messages.length == 0)
148 {
149 System.out.println("No messages");
150 pop3.logout();
151 pop3.disconnect();
152 System.exit(1);
153 }
154
155 for (message = 0; message < messages.length; message++)
156 {
157 reader = pop3.retrieveMessageTop(messages[message].number, 0);
158
159 if (reader == null)
160 {
161 System.err.println("Could not retrieve message header.");
162 pop3.disconnect();
163 System.exit(1);
164 }
165
166 printMessageInfo(new BufferedReader(reader), messages[message].number);
167 }
168
169 pop3.logout();
170 pop3.disconnect();
171 }
172 catch (IOException e)
173 {
174 e.printStackTrace();
175 System.exit(1);
176 }
177 }
178 }
179
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