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1 package SnowMailClient.MailEngine;
2
3
4 import javax.naming.*;
5 import javax.naming.directory.*;
6 import java.net.*;
7 import java.util.*;
8
9
10 public final class MXReader
11 {
12
13
14 public static final Vector<MXRecord> getMXRecordWithoutCache(String  domainName) throws Exception
15 {
16 final Vector<MXRecord> records = new Vector<MXRecord>();
17
18 DirContext ictx = new InitialDirContext();
19 Attributes attributes = ictx.getAttributes("dns:/"+domainName, new String [] {"MX"});
20 if (attributes != null)
21 {
22 NamingEnumeration attribNames = attributes.getIDs();
23 while (attribNames.hasMore())
24 {
25 String name = (String ) attribNames.next();
26 Attribute attr = attributes.get(name);
27 System.out.println(attr);
28 for(int i=0; i<attr.size(); i++)
29 {
30 Scanner s = new Scanner(""+attr.get(i));
31 int priority = s.nextInt();
32 String server = s.next();
33 if(server.endsWith(".")) server = server.substring(0, server.length()-1);
34 records.add( new MXRecord(priority, server) );
35 }
36 }
37 }
38
39 Collections.sort( records );
40
41 return records;
42 }
43
44
45 public static void main(String [] a)
46 {
47 try
48 {
49 System.out.println( getMXRecordWithoutCache("gmx.ch") );
50 System.out.println( getMXRecordWithoutCache("bluewin.ch") );
51 System.out.println( getMXRecordWithoutCache("snowraver.org") );
52 }
53 catch(Exception e)
54 {
55 e.printStackTrace();
56 }
57 }
58
59 public final static class MXRecord implements Comparable <MXRecord>
60 {
61 final public int priority;
62 final public String server;
63
64 public MXRecord(int priority, String server)
65 {
66 this.priority = priority;
67 this.server = server;
68 }
69
70 public final int compareTo(MXRecord mr)
71 {
72 if(mr.priority > priority) return 1;
74 if(mr.priority < priority) return -1;
75 return 0;
76 }
77
78 public String toString()
79 {
80 return server+" ("+priority+")";
81 }
82 }
83
84
85 } |
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