Sending a stream (?)

Question

Hello,
I have a problem:
I'd like to send a pdf file, but I got only an InputStream representing the file. And since it is a report generated by a database, a file per se does not exisit at all.
The question is - how do you send such a thing with java mail?
If it is as simple as:
MimeBodypart mbp = new MimeBodyPart(inputstream), what mime type should I use? application/pdf and application/octet-stream doesn't seem to be supported.
I really don't want to encumber the server any more, so writing the stream to a file would not be a good solution.
best regards
-- rkr

Answer 1

Hi,
In the demo/ direcory from the javamail distribution there is a class called ByteArrayDataSource. It implements DataSource and can be constructed from an InputStream and a String containing the mime type.
You can use this to make a MimeBodyPart containing the file and the proper mime type:
MimeBodyPart mbp2 = new MimeBodyPart();
ByteArrayDataSource bads = new ByteArrayDataSource(stream, type); // stream is the InputStream and type is the mime type
mbp2.setDataHandler(new DataHandler(bads));
mbp2.setFileName(filename); // filename is whatever file name should show up in the attachmentYou also need the JavaBeans Activation Framework(javax.activation) in order to use this.