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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.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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