SOAP Message Attachment MIME Problem

Question

Hi there,
I'm having problem trying to send a binary file with SOAP.
I can send an XML Doc (MIME type text/xml) but when I try to put the ByteArrayInputStream that holds the binary file and the content to application/octec-stream
I got this exception:
javax.activation.UnsupportedDataTypeException: no object DCH for MIME type application/octet-stream
     at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:851)
     at javax.activation.DataHandler.writeTo(DataHandler.java:305)
     at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1089)
     at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:635)
     at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:233)
     at com.sun.xml.messaging.soap.MessageImpl.saveChanges(MessageImpl.java:371)
Anyone had this problem ?
Any work around ?
Or this is a problem because the JAXM is not fineshed yet ?
Thanks,
Marcio

Answer 1

Hey guys... I pray you are all still listening.
I have been on the most mind numbing cookie trail ever (I'm blatantly lying - I'm a Java programmer!) following these blasted exception trails to an 'Unknown Source'
After initially reading this thread I quickly knocked up ObjectDataSource as follows:
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import javax.activation.DataSource;
public class ObjectDataSource
implements DataSource
     public static final long serialVersionUID;
     public static final String CONTENT_TYPE;
     static {
          serialVersionUID = 42L;
          CONTENT_TYPE = "application/x-java-serialized-object";
     } // end static initializer
     private byte[] objectBytes;
     private String contentId;
     public ObjectDataSource(Serializable object, String contentId)
     throws IOException
          if (contentId == null || contentId.equals(""))
               this.contentId = object.getClass().getName();
          else
               this.contentId = contentId;
          ByteArrayOutputStream baoStream = new ByteArrayOutputStream();
          ObjectOutputStream ooStream = new ObjectOutputStream(baoStream);
          ooStream.writeObject(object);
          ooStream.flush();
          ooStream.close();
          objectBytes = baoStream.toByteArray();
     } // end primary constructor
     public InputStream getInputStream()
     throws java.io.IOException
          ByteArrayInputStream baiStream = new ByteArrayInputStream(objectBytes);
          return new ObjectInputStream(baiStream);
     } // end getInputStream
     public OutputStream getOutputStream()
     throws java.io.IOException
          throw new IOException("Cannot write to this stream");
     } // end getOutputStream
     public String getContentType()
          return CONTENT_TYPE;
     } // end getContentType
     public String getName()
          return contentId;
     } // end getName
} // end ObjectDataSource classand use it as follows:
AttachmentPart attachment = soapResponse.createAttachmentPart();
ObjectDataSource ods = new ObjectDataSource(requestedObject, null);
attachment.setDataHandler(new DataHandler(ods));
attachment.setContentId(ods.getName());
soapResponse.addAttachmentPart(attachment);
soapResponse.saveChanges();... this is within my 'SOAPServlet extends JAXMServlet' servlet, which happens to work fine when testing the servlet outside a web-container. But testing with Tomcat 5.5.x It doesn't work... infact, it damn well dissappears. I try readObject after retrieving and casting the InputStream to an ObjectInputStream from the AttachmentPart, but I get a:
Exception in thread "main" java.lang.ClassCastException: java.io.ByteArrayInputStream which is totally bizzare!
So I do a bit of investigation to discover ....
application/x-java-serialized-object
java.lang.String
javax.mail.internet.MimePartDataSource
java.io.ByteArrayInputStream
0 // this would be the available bytes in the ByteArrayInputStreamNow the first two lines confirm my ObjectDataSource is there somewhere or that that data was sent over the wire (ha, i'm on the same damn machine), but where the hell did MimePartDataSource come from?
I have previously encountered the various exceptions including java.io.EOFException when trying to read from the byte stream and java.io.StreamCorruptedException when wrapping that byte stream with an object stream.
These setbacks have royally ****ed my project; cahnces are slim that it will get finished. I'm ready to give up.
Any help will be appreciated?
Warm regards,
Darren B