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1 package goodjava.mail;
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2
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3 import java.util.Map;
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4 import java.util.Base64;
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5 import java.util.Random;
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6 import java.util.regex.Pattern;
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7 import java.util.regex.Matcher;
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8 import goodjava.util.GoodUtils;
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9
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10
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11 public class Message {
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12 final Map<String,String> headers;
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13 final Object content;
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14 private static Pattern line = Pattern.compile("(?m)^.*$");
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15
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16 public Message(Map<String,String> headers,String content) {
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17 this.headers = headers;
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18 this.content = content;
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19 }
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20
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21 public Message(Map<String,String> headers,byte[] content) {
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22 this.headers = headers;
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23 this.content = content;
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24 }
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25
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26 public Message(Map<String,String> headers,Message[] content) {
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27 this.headers = headers;
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28 this.content = content;
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29 }
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30
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31 private static void addBase64(StringBuilder sb,byte[] a) {
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32 String s = Base64.getEncoder().encodeToString(a);
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33 int n = s.length() - 76;
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34 int i;
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35 for( i=0; i<n; i+=76 ) {
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36 sb.append(s.substring(i,i+76)).append("\r\n");
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37 }
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38 sb.append(s.substring(i)).append("\r\n");
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39 }
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40
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41 public String toText() throws MailException {
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42 StringBuilder sb = new StringBuilder();
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43 String contentType = null;
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44 for( Map.Entry<String,String> entry : headers.entrySet() ) {
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45 String name = entry.getKey();
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46 String value = entry.getValue();
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47 if( name.equalsIgnoreCase("bcc") )
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48 continue;
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49 if( name.equalsIgnoreCase("content-type") ) {
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50 contentType = value;
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51 continue;
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52 }
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53 sb.append( name ).append( ": " ).append( value ).append( "\r\n" );
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54 }
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55 if( content instanceof String ) {
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56 String s = (String)content;
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57 if( contentType!=null )
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58 sb.append( "Content-Type: " ).append( contentType ).append( "\r\n" );
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59 boolean isAscii = s.matches("\\p{ASCII}*");
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60 if( !isAscii )
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61 sb.append( "Content-Transfer-Encoding: base64\r\n" );
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62 sb.append( "\r\n" );
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63 if( isAscii ) {
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64 Matcher m = line.matcher(s);
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65 while( m.find() ) {
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66 sb.append(m.group()).append("\r\n");
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67 }
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68 } else {
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69 addBase64( sb, GoodUtils.getBytes(s,"UTF-8") );
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70 }
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71 } else if( content instanceof byte[] ) {
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72 if( contentType!=null )
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73 sb.append( "Content-Type: " ).append( contentType ).append( "\r\n" );
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74 sb.append( "Content-Transfer-Encoding: base64\r\n" );
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75 sb.append( "\r\n" );
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76 addBase64( sb, (byte[])content );
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77 } else if( content instanceof Message[] ) {
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78 if( contentType==null )
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79 throw new MailException("Content-Type must be defined for multipart");
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80 Message[] messages = (Message[])content;
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81 String[] texts = new String[messages.length];
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82 StringBuilder allTextSb = new StringBuilder();
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83 for( int i=0; i<messages.length; i++ ) {
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84 String text = messages[i].toText();
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85 texts[i] = text;
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86 allTextSb.append(text);
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87 }
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88 String allText = allTextSb.toString();
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89 String boundary;
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90 do {
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91 boundary = Long.toHexString(new Random().nextLong());
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92 } while( allText.contains(boundary) );
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93 sb.append( "Content-Type: " ).append( contentType )
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94 .append( "; boundary=\"" ).append( boundary ).append( "\"\r\n" );
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95 sb.append( "\r\n" );
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96 for( String text : texts ) {
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97 sb.append( "--" ).append( boundary ).append( "\r\n" );
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98 sb.append( text );
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99 sb.append( "\r\n" );
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100 }
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101 sb.append( "--" ).append( boundary ).append( "--\r\n" );
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102 } else
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103 throw new RuntimeException();
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104 return sb.toString();
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105 }
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106 }
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