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examples.messages |
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1 | /* |
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2 | * Copyright 2001-2005 The Apache Software Foundation |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package examples; |
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17 | ||
18 | import java.io.BufferedReader; |
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19 | import java.io.IOException; |
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20 | import java.io.Reader; |
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21 | import org.apache.commons.net.pop3.POP3Client; |
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22 | import org.apache.commons.net.pop3.POP3MessageInfo; |
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23 | ||
24 | /*** |
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25 | * This is an example program demonstrating how to use the POP3Client class. |
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26 | * This program connects to a POP3 server and retrieves the message |
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27 | * headers of all the messages, printing the From: and Subject: header |
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28 | * entries for each message. |
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29 | * <p> |
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30 | * Usage: messages <pop3 server hostname> <username> <password> |
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31 | * <p> |
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32 | ***/ |
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33 | 0 | public final class messages |
34 | { |
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35 | ||
36 | public static final void printMessageInfo(BufferedReader reader, int id) |
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37 | throws IOException |
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38 | { |
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39 | String line, lower, from, subject; |
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40 | ||
41 | 0 | from = ""; |
42 | 0 | subject = ""; |
43 | ||
44 | 0 | while ((line = reader.readLine()) != null) |
45 | { |
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46 | 0 | lower = line.toLowerCase(); |
47 | 0 | if (lower.startsWith("from: ")) |
48 | 0 | from = line.substring(6).trim(); |
49 | 0 | else if (lower.startsWith("subject: ")) |
50 | 0 | subject = line.substring(9).trim(); |
51 | } |
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52 | ||
53 | 0 | System.out.println(Integer.toString(id) + " From: " + from + |
54 | " Subject: " + subject); |
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55 | 0 | } |
56 | ||
57 | public static final void main(String[] args) |
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58 | { |
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59 | int message; |
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60 | String server, username, password; |
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61 | POP3Client pop3; |
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62 | Reader reader; |
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63 | POP3MessageInfo[] messages; |
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64 | ||
65 | 0 | if (args.length < 3) |
66 | { |
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67 | 0 | System.err.println( |
68 | "Usage: messages <pop3 server hostname> <username> <password>"); |
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69 | 0 | System.exit(1); |
70 | } |
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71 | ||
72 | 0 | server = args[0]; |
73 | 0 | username = args[1]; |
74 | 0 | password = args[2]; |
75 | ||
76 | 0 | pop3 = new POP3Client(); |
77 | // We want to timeout if a response takes longer than 60 seconds |
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78 | 0 | pop3.setDefaultTimeout(60000); |
79 | ||
80 | try |
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81 | { |
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82 | 0 | pop3.connect(server); |
83 | } |
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84 | 0 | catch (IOException e) |
85 | { |
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86 | 0 | System.err.println("Could not connect to server."); |
87 | 0 | e.printStackTrace(); |
88 | 0 | System.exit(1); |
89 | 0 | } |
90 | ||
91 | try |
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92 | { |
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93 | 0 | if (!pop3.login(username, password)) |
94 | { |
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95 | 0 | System.err.println("Could not login to server. Check password."); |
96 | 0 | pop3.disconnect(); |
97 | 0 | System.exit(1); |
98 | } |
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99 | ||
100 | 0 | messages = pop3.listMessages(); |
101 | ||
102 | 0 | if (messages == null) |
103 | { |
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104 | 0 | System.err.println("Could not retrieve message list."); |
105 | 0 | pop3.disconnect(); |
106 | 0 | System.exit(1); |
107 | } |
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108 | 0 | else if (messages.length == 0) |
109 | { |
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110 | 0 | System.out.println("No messages"); |
111 | 0 | pop3.logout(); |
112 | 0 | pop3.disconnect(); |
113 | 0 | System.exit(1); |
114 | } |
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115 | ||
116 | 0 | for (message = 0; message < messages.length; message++) |
117 | { |
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118 | 0 | reader = pop3.retrieveMessageTop(messages[message].number, 0); |
119 | ||
120 | 0 | if (reader == null) |
121 | { |
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122 | 0 | System.err.println("Could not retrieve message header."); |
123 | 0 | pop3.disconnect(); |
124 | 0 | System.exit(1); |
125 | } |
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126 | ||
127 | 0 | printMessageInfo(new BufferedReader(reader), messages[message].number); |
128 | } |
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129 | ||
130 | 0 | pop3.logout(); |
131 | 0 | pop3.disconnect(); |
132 | } |
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133 | 0 | catch (IOException e) |
134 | { |
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135 | 0 | e.printStackTrace(); |
136 | 0 | System.exit(1); |
137 | 0 | } |
138 | 0 | } |
139 | } |
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140 |
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