Instead of saving it in DataStore, I would recommend using BlobStore. I do it something like this:
- Retrieve all data uploaded using BlobstoreService::getUploadedBlobs - Do all the validation, as may be required (with other form data) - if !valid => BlobstoreService::delete(...) else => Keep it saved in blob-store and continue -Gaurav www.mastergaurav.com On Oct 21, 4:43 pm, erikzamith <[email protected]> wrote: > Hello, > I have an image that would save the user (email) and a idimagen. > I use a form to send email and idimagen (Book). But do not persistence. > > I also want to know how to limit the types of images (jpg, png and gif > only). > > This is my > > public class Upload extends HttpServlet { > @Override > public void doPost(HttpServletRequest request, HttpServletResponse res) > throws ServletException, IOException { > > Long bookid = -4L; > String email = ""; > Blob imageBlob = null; > try{ > ServletFileUpload upload = new ServletFileUpload(); > FileItemIterator iter = upload.getItemIterator(request); > while(iter.hasNext()){ > FileItemStream imageItem = iter.next(); > if(imageItem.isFormField()) { > String name = imageItem.getFieldName(); > InputStream imgStream = imageItem.openStream(); > > byte [] buffer = new byte[1024]; > int i=0; > while(true) { > int v = imgStream.read(); > if(v == 0 || v == -1) > break; > buffer[i] = (byte) v; > i++;} > > String value = new String(buffer,0,i); > > if("bookid".equals(name)){ > bookid = Long.valueOf(value); > System.out.println("bookid: "+bookid);} > > if("email".equals(name)) > email = value; > System.out.println("email: "+email);} else { > > InputStream imgStream = imageItem.openStream(); > imageBlob = new Blob(IOUtils.toByteArray(imgStream));} > } > > // construct our entity objects > > BookImage myImage = new BookImage(bookid, email, imageBlob); > > // persist image > PersistenceManager pm = Commons.instance().getPersistenceManager(); > pm.makePersistent(myImage); > > // respond to query > res.setContentType("text/plain"); > res.getOutputStream().write("OK!".getBytes()); > > } catch(FileUploadException e){ > > e.printStackTrace(); > > } > } > } > > But when I show the picture, no picture, not saved any. -- 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
