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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.regex.Pattern;
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6 import java.util.regex.Matcher;
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7 import goodjava.util.GoodUtils;
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8
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9
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10 public class Message {
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11 public final Map<String,String> headers;
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12 public final Object content;
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13 private static Pattern line = Pattern.compile("(?m)^.*$");
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14
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15 public Message(Map<String,String> headers,Object content) {
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16 this.headers = headers;
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17 this.content = content;
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18 }
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19
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20 private static void addBase64(StringBuilder sb,byte[] a) {
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21 String s = Base64.getEncoder().encodeToString(a);
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22 int n = s.length() - 76;
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23 int i;
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24 for( i=0; i<n; i+=76 ) {
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25 sb.append(s.substring(i,i+76)).append("\r\n");
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26 }
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27 sb.append(s.substring(i)).append("\r\n");
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28 }
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29
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30 public String toText() throws MailException {
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31 StringBuilder sb = new StringBuilder();
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32 String contentType = null;
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33 for( Map.Entry<String,String> entry : headers.entrySet() ) {
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34 String name = entry.getKey();
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35 String value = entry.getValue();
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36 if( name.equalsIgnoreCase("bcc") )
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37 continue;
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38 if( name.equalsIgnoreCase("content-type") ) {
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39 contentType = value;
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40 continue;
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41 }
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42 sb.append( name ).append( ": " ).append( value ).append( "\r\n" );
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43 }
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44 if( contentType==null )
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45 throw new MailException("Content-Type not defined");
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46 if( content instanceof String ) {
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47 String s = (String)content;
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48 sb.append( "Content-Type: " ).append( contentType ).append( "\r\n" );
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49 boolean isAscii = s.matches("\\p{ASCII}*");
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50 if( !isAscii )
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51 sb.append( "Content-Transfer-Encoding: base64\r\n" );
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52 sb.append( "\r\n" );
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53 if( isAscii ) {
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54 Matcher m = line.matcher(s);
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55 while( m.find() ) {
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56 sb.append(m.group()).append("\r\n");
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57 }
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58 } else {
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59 addBase64( sb, GoodUtils.getBytes(s,"UTF-8") );
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60 }
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61 } else if( content instanceof byte[] ) {
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62 sb.append( "Content-Type: " ).append( contentType ).append( "\r\n" );
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63 sb.append( "Content-Transfer-Encoding: base64\r\n" );
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64 sb.append( "\r\n" );
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65 addBase64( sb, (byte[])content );
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66 } else
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67 throw new MailException("content is unrecognized type");
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68 return sb.toString();
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69 }
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70 }
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