2 * Copyright 2008 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.web;
19 import com.google.zxing.MultiFormatReader;
20 import com.google.zxing.Reader;
21 import com.google.zxing.ReaderException;
22 import com.google.zxing.Result;
23 import com.google.zxing.client.j2se.BufferedImageMonochromeBitmapSource;
25 import javax.imageio.ImageIO;
26 import javax.mail.Address;
27 import javax.mail.Authenticator;
28 import javax.mail.Flags;
29 import javax.mail.Folder;
30 import javax.mail.Message;
31 import javax.mail.MessagingException;
32 import javax.mail.Session;
33 import javax.mail.Store;
34 import javax.mail.Transport;
35 import javax.mail.internet.InternetAddress;
36 import javax.mail.internet.MimeBodyPart;
37 import javax.mail.internet.MimeMessage;
38 import javax.mail.internet.MimeMultipart;
39 import java.awt.image.BufferedImage;
40 import java.io.UnsupportedEncodingException;
41 import java.io.IOException;
42 import java.util.Properties;
43 import java.util.TimerTask;
44 import java.util.logging.Level;
45 import java.util.logging.Logger;
48 * A {@link TimerTask} which repeatedly checks an e-mail account for messages with an attached
49 * image. When one is found it attempts to decode the image and replies with the decoded messages
52 * @author Sean Owen (srowen@google.com)
54 final class DecodeEmailTask extends TimerTask {
56 private static final Logger log = Logger.getLogger(DecodeEmailTask.class.getName());
58 private static final String SMTP_HOST = "smtp.gmail.com";
59 private static final String POP_HOST = "pop.gmail.com";
60 private static final String SMTP_PORT = "465";
61 private static final String POP_PORT = "995";
62 private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
63 private static final Properties sessionProperties = new Properties();
65 sessionProperties.setProperty("mail.transport.protocol", "smtp");
66 sessionProperties.setProperty("mail.smtp.host", SMTP_HOST);
67 sessionProperties.setProperty("mail.smtp.auth", "true");
68 sessionProperties.setProperty("mail.smtp.port", SMTP_PORT);
69 sessionProperties.setProperty("mail.smtp.socketFactory.port", SMTP_PORT);
70 sessionProperties.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
71 sessionProperties.setProperty("mail.smtp.socketFactory.fallback", "false");
72 sessionProperties.setProperty("mail.smtp.quitwait", "false");
73 sessionProperties.setProperty("mail.pop3.host", POP_HOST);
74 sessionProperties.setProperty("mail.pop3.auth", "true");
75 sessionProperties.setProperty("mail.pop3.port", POP_PORT);
76 sessionProperties.setProperty("mail.pop3.socketFactory.port", POP_PORT);
77 sessionProperties.setProperty("mail.pop3.socketFactory.class", SSL_FACTORY);
78 sessionProperties.setProperty("mail.pop3.socketFactory.fallback", "false");
81 private final Authenticator emailAuthenticator;
82 private final Address fromAddress;
84 DecodeEmailTask(String emailAddress, Authenticator emailAuthenticator) {
85 this.emailAuthenticator = emailAuthenticator;
87 fromAddress = new InternetAddress(emailAddress, "ZXing By Email");
88 } catch (UnsupportedEncodingException uee) {
90 throw new RuntimeException(uee);
96 log.info("Checking email...");
97 Session session = Session.getInstance(sessionProperties, emailAuthenticator);
101 store = session.getStore("pop3");
103 inbox = store.getFolder("INBOX");
104 inbox.open(Folder.READ_WRITE);
105 int count = inbox.getMessageCount();
107 log.info("Found " + count + " messages");
109 for (int i = 1; i <= count; i++) {
110 log.info("Processing message " + i);
111 Message message = inbox.getMessage(i);
112 processMessage(session, message);
114 } catch (Throwable t) {
115 log.log(Level.WARNING, "Unexpected error", t);
117 closeResources(store, inbox);
121 private void processMessage(Session session, Message message) throws MessagingException, IOException {
122 Object content = message.getContent();
123 if (content instanceof MimeMultipart) {
124 MimeMultipart mimeContent = (MimeMultipart) content;
125 int numParts = mimeContent.getCount();
126 for (int j = 0; j < numParts; j++) {
127 MimeBodyPart part = (MimeBodyPart) mimeContent.getBodyPart(j);
128 processMessagePart(session, message, part);
131 message.setFlag(Flags.Flag.DELETED, true);
134 private void processMessagePart(Session session, Message message, MimeBodyPart part)
135 throws MessagingException, IOException {
136 String contentType = part.getContentType();
137 if (contentType.startsWith("image/")) {
138 BufferedImage image = ImageIO.read(part.getInputStream());
140 Reader reader = new MultiFormatReader();
141 Result result = null;
143 result = reader.decode(new BufferedImageMonochromeBitmapSource(image), DecodeServlet.HINTS);
144 } catch (ReaderException re) {
145 log.info("Decoding FAILED");
148 Message reply = new MimeMessage(session);
149 Address sender = message.getFrom()[0];
150 reply.setRecipient(Message.RecipientType.TO, sender);
151 reply.setFrom(fromAddress);
152 if (result == null) {
153 reply.setSubject("Decode failed");
154 reply.setContent("Sorry, we could not decode that image.", "text/plain");
156 String text = result.getText();
157 reply.setSubject("Decode succeeded");
158 reply.setContent(text, "text/plain");
160 log.info("Sending reply");
161 Transport.send(reply);
166 private void closeResources(Store store, Folder inbox) {
174 } catch (MessagingException me) {
179 public static void main(String[] args) {
180 String emailAddress = args[0];
181 String emailPassword = args[1];
182 Authenticator emailAuthenticator = new EmailAuthenticator(emailAddress, emailPassword);
183 new DecodeEmailTask(emailAddress, emailAuthenticator).run();