Sending eMail with processing

//Code adapted from http://www.javaworld.com/javaworld/javatips/jw-javatip36-p3.html
//http://pages.prodigy.net/michael_santovec/pop3telnet.htm
//and Craig Morrall <morrall at comp.lancs.ac.uk>

String mailServer = "post.gold.ac.uk";

String userName = "username";
String password = "password";
//String subject = "This message is coming from Processing";
//String messageHeader = "Hello";
//String fileName = "message.txt";
//String[] message;

//strange java thing to get a correct carriage return
String  carriageReturn = System.getProperty("line.separator");

//temp file for attachments
byte[] attachmentBytes;

// now write the bytes to a file
//saveBytes("numbers.dat", nums);

void setup()
{
  readMessage();
}

void readMessage()
{
  println("Trying...");
  try {

    //connect to the mail server
    Socket socket = new Socket(mailServer, 110);

    //create an in and out connection
    DataOutputStream out = new DataOutputStream(socket.getOutputStream());
    DataInputStream in = new DataInputStream(socket.getInputStream());

    //ask your machine what it's really called
    String hostname = InetAddress.getLocalHost().getHostName();
    println("HOST: "+hostname);

    //converse with the mail server
    readIn(in, "OK");

    //tell the mail server who you are
    sendCommand(out, in, "USER "+ userName + carriageReturn);
    readIn(in, "OK");
    //tell the mail server what your password is
    sendCommand(out, in, "PASS "+ password + carriageReturn);
    readIn(in, "OK");

    //ask for a list of all the emails on the mail server
    sendCommand(out, in, "LIST" +  carriageReturn);
    String[] messageListHeader = readIn(in, "OK");
    int messageNumber = int(messageListHeader[0].substring(4,(messageListHeader[0].indexOf("messages")-1)));
    println("There are " + messageNumber + " messages");
    readIn(in, ".");

    //ask for the email headers
    //for (int incrementMessageNumber=0; incrementMessageNumber<messageNumber; incrementMessageNumber++)
    for (int incrementMessageNumber=messageNumber-2; incrementMessageNumber<messageNumber; incrementMessageNumber++)
    {
      sendCommand(out, in, "TOP " + incrementMessageNumber + " 0" +  carriageReturn);
      //readIn(in, "OK");
      readIn(in, ".");

    }

    sendCommand(out, in, "RETR " + messageNumber +  carriageReturn);
    //readIn(in, "OK");
    processMessageSource(readIn(in, "."));

    sendCommand(out, in, "RETR " + (messageNumber-1) +  carriageReturn);
    //sendCommand(out, in, "RETR " + 156 +  carriageReturn);
    //readIn(in, "OK");
    readIn(in, ".");


    //end the conversation
    sendCommand(out, in, "QUIT" + carriageReturn);
    readIn(in, "OK");

    //close the connections
    in.close();
    out.close();

    //println("Message '" + subject + "' sent to '" + reciever + "'");

  }//end of try statement
  catch (UnknownHostException e)
  {
    println("Unknown Host Exception: " + e);
  }//end of catch statement
  catch(IOException e)
  {
    println("Send failure: " + e);
  }//end of catch statement

}//end of method readMessage

void processMessageSource(String[] messageSourceHolder)
{

  //Content-Type: multipart/mixed; boundary="----=_NextPart_000_00CE_01C66006.5EACC8D0"

//Message line 16 from mail server: Content-Type: multipart/alternative;
//Message line 17 from mail server:     boundary="----=_NextPart_000_0045_01C660D4.0341E060"


  //Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original
//Content-Transfer-Encoding: 7bit


//Content-Type: application/octet-stream; name=BT_Word_Wrap_14.pde


//Message line 204 from mail server: Content-Type: application/octet-stream; name=BT_Word_Wrap_14.pde
//Message line 205 from mail server: Content-Transfer-Encoding: quoted-printable
//Message line 206 from mail server: Content-Disposition: attachment; filename="BT_Word_Wrap_14.pde"
//Message line 207 from mail server:

//Message line 375 from mail server: Content-Type: application/octet-stream; name=Dot-Matrix-16.mvlw
//Message line 376 from mail server: Content-Transfer-Encoding: base64
//Message line 377 from mail server: Content-Disposition: attachment; filename="Dot-Matrix-16.mvlw"
//Message line 378 from mail server:

//Message line 2524 from mail server: Content-Type: image/jpeg; name=s&p2low.jpg
//Message line 2525 from mail server: Content-Transfer-Encoding: base64
//Message line 2526 from mail server: Content-Disposition: attachment; filename="s&p2low.jpg"
//Message line 2527 from mail server:


}

void sendCommand(DataOutputStream out, DataInputStream in, String commandHolder) throws IOException
{

  if(commandHolder != null)
  {
    out.writeBytes(commandHolder);
    println("");
    println("Command: "+ commandHolder);
  }//end of if statement

}//end of method sendCommand

String[] readIn(DataInputStream in, String breakHolder) throws IOException
{
  String record = null;
  String[] returnRecord = new String[1];
  String[] newRecord = new String[1];
  int lineCount = 0;

  try
  {
    while((record = in.readLine()) != null)
    {

      //add the line to the record array
      newRecord[0] = record;

      if ( record.equals("Content-Transfer-Encoding: base64") )
      {

    //  bytesIn = true;

      }
      else
      {//must be text based

      if (lineCount == 0)
      {
        returnRecord[0] = newRecord[0];
        println("Message line " + lineCount + " from mail server: "+returnRecord[0]);
        lineCount++;
      }
      else
      {
        returnRecord = concat(returnRecord, newRecord);
        println("Message line " + lineCount + " from mail server: "+returnRecord[lineCount]);
        lineCount++;
      }


      }//end of must be text based

      //if the read line contains the break character then stop
      if (record.indexOf(breakHolder) != -1)
      {
        if (breakHolder.equals("."))
        {
          if ( record.length() == 1)
          {
            println("Terminated with a single stop break");

            break;
          }//end of if statement
        }//end of if statement
        else
        {
          println("Terminated with a " + breakHolder + " break");
          break;
        }//end of else statement
      }//end of if statement
    }//end of while statement

    //return the record array
    return returnRecord;

  }//end of try statement
  catch (IOException e)
  {
    println("Read failure "+e);
  }//end of catch statement

  //return the record array
  return returnRecord;

}//end of method readIn