Here's some code I wrote a while ago. Note that I pulled this from docs I was working on about saving attached Images in the datastore and not a test case, so it may not work out of the box without some tweaking. Give it a try (and if it's broken, fixes appreciated!):
http://pastie.org/865494 public class IncomingMailHandlerServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Properties props = new Properties(); Session session = Session.getDefaultInstance(props, null); try { MimeMessage message = new MimeMessage(session, request.getInputStream()); InputStream inputStream = message.getInputStream(); ByteArrayDataSource inboundDataSource = new ByteArrayDataSource(inputStream, message.getContentType()); Multipart inboundMultipart = new MimeMultipart(inboundDataSource); for (int i = 0; i < inboundMultipart.getCount(); i++) { BodyPart part = inboundMultipart.getBodyPart(i); if (part.getDisposition() == null) { // This is just a plain text part } else if (part.getDisposition().equals("attachment")) { // Create a new ByteArrayDataSource with this part MimeBodyPart inboundMimeBodyPart = (MimeBodyPart) part; // The call to getContentType here may return a filename along with content type. Ex: // image/jpeg; name="filename.jpg" // It doesn't seem to affect display in a browser but you may wish to sanitize it String contentType = inboundMimeBodyPart.getContentType(); InputStream is = part.getInputStream(); byte[] rawData, buffer = new byte[8192]; int len; ByteArrayOutputStream output = new ByteArrayOutputStream(); try { while ((len = is.read(buffer, 0, buffer.length)) != -1) output.write(buffer, 0, len); rawData = output.toByteArray(); } finally { output.close(); } PersistenceManager pm = PMF.get().getPersistenceManager(); Image image = new Image(new Blob(rawData), contentType); try { pm.makePersistent(image); } finally { pm.close(); } } } } catch (MessagingException e) { throw new ServletException(e); } } } On Fri, Mar 5, 2010 at 5:41 AM, thierry Le conniat <thlec...@euriware.fr> wrote: > Hello, > my application receive by mail, pictures which are encoding in jpg. > I would like to make some analysis in this picture (represented by an > array of byte ), comparison column by column, but GAE'S Image API > don't provide such function and many classes from javax.io... are not > authorized . > > So, how can I do ? > > Below the source code where i would like to > > ... > byte b[] = null ; > if (myDataHandler != null && myDataHandler.getDataSource() != null) > { { > InputStream myInputStream = myDataHandler.getInputStream(); > > log.info("myInputStream.available " + > myInputStream.available()); > b= new byte[myInputStream.available()]; > myInputStream.read(b); > > // analysis of b > } > > thanks for jour help. > > bye > > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to google-appengine-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > -- Ikai Lan Developer Programs Engineer, Google App Engine http://googleappengine.blogspot.com | http://twitter.com/app_engine -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
