Attaching jpeg from upload to message

Question

Hi,
I'm trying to write a servlet which must handle the incoming data submitted by a html form. The data consist of strings as wel as images(jpg, gif, bmp).
Using the commons fileupload i get to the point where the item parsed by fileupload is an image.
Normally next step should be to add a MimeBodyPart to the multipart like this:
if (!item.isFormField()) {
MimeBodyPart att = new MimeBodyPart();
att.setHeader("Content-Type","image/jpeg");
att.setHeader("Content-Transfer-Encoding", "base64");
att.setHeader("Content-Disposition", "attachment");
att.setFileName("item.getName()");
att.setDataHandler(new DataHandler(
Base64.encode item.get)), "image/jpeg"));
multipart.addBodyPart(att);
if I leave out the image part(ie only text)...the mail gets send to the right email with the right content, but when I try to attach the file to the message no mail is send...
Can someone point out what I'm doing wrong?
Thanks in advance,
Stefan

Answer 1

What type is the image data you're trying to attach? I remember having problems if data was in form of either byte array or byte stream, had to declare a new subclass of DataSource to handle it:
// container is of type MimeMultipart; fileName is just a String; data is byte[]
MimeBodyPart attachmentBodyPart = new MimeBodyPart();
attachmentBodyPart.setDataHandler(new DataHandler(new ByteArrayDataSource(data)));
attachmentBodyPart.setFileName(fileName);
container.addBodyPart(attachmentBodyPart);
class ByteArrayDataSource implements DataSource {
     private static final String OCTET_STREAM = "application/octet-stream";
     private byte[] data;
     private String contentType;
     public ByteArrayDataSource(byte[] data) {
          this(data, OCTET_STREAM);
     public ByteArrayDataSource(byte[] data, String contentType) {
          this.data = data;
          this.contentType = contentType;
     public String getContentType() {
          return contentType;
     public InputStream getInputStream() {
          return new ByteArrayInputStream(data);
     public String getName() {
          return "ByteArrayDataSource";
     public OutputStream getOutputStream() throws IOException {
          throw new FileNotFoundException();
}Try it out, see if it works. I was succesfully sending generated PDF files with it.