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19
20 package org.apache.james.transport.matchers;
21
22 import org.apache.mailet.GenericMatcher;
23 import org.apache.mailet.Mail;
24
25 import javax.mail.Header;
26 import javax.mail.MessagingException;
27 import javax.mail.internet.MimeMessage;
28 import java.util.Collection;
29 import java.util.Enumeration;
30 import java.util.Locale;
31
32 /***
33 * Checks whether the message (entire message, not just content) is greater
34 * than a certain number of bytes. You can use 'k' and 'm' as optional postfixes.
35 * In other words, "1m" is the same as writing "1024k", which is the same as
36 * "1048576".
37 *
38 */
39 public class SizeGreaterThan extends GenericMatcher {
40
41 int cutoff = 0;
42
43 public void init() {
44 String amount = getCondition().trim().toLowerCase(Locale.US);
45 if (amount.endsWith("k")) {
46 amount = amount.substring(0, amount.length() - 1);
47 cutoff = Integer.parseInt(amount) * 1024;
48 } else if (amount.endsWith("m")) {
49 amount = amount.substring(0, amount.length() - 1);
50 cutoff = Integer.parseInt(amount) * 1024 * 1024;
51 } else {
52 cutoff = Integer.parseInt(amount);
53 }
54 }
55
56 public Collection match(Mail mail) throws MessagingException {
57 MimeMessage message = mail.getMessage();
58
59 int size = message.getSize();
60 Enumeration e = message.getAllHeaders();
61 while (e.hasMoreElements()) {
62 size += ((Header)e.nextElement()).toString().length();
63 }
64 if (size > cutoff) {
65 return mail.getRecipients();
66 } else {
67 return null;
68 }
69 }
70 }