> Not really what happens, apparently does not save the image (blob), or
> email, or the idimage. because when you try to display it, is null.
> This is the doGet
> public void doGet(HttpServletRequest req, HttpServletResponse resp)
> throws ServletException, IOException {
>
> String email = req.getParameter("email");
> String bookid = req.getParameter("bookid");
> BookImage imagen = getImage(email, bookid );
>
> if (imagen != null && imagen.getImage() != null) {
>
> Blob imageBlob = imagen.getImage();
>
> // serve the first image
> resp.setContentType("image/jpg");
>
> resp.getOutputStream().write(imageBlob.getBytes());
> } else {
> // If no image is found with the given title,
> redirect the user
> // to
> // a static image
>
> resp.sendRedirect("images/no_image.png");
> }
>
> }
private BookImage getImage(String email, String bookid) {
PersistenceManager pm =
Commons.instance().getPersistenceManager();
Query query = pm.newQuery(BookImage.class, "email ==
'"+email+"' &&
bookid == '"+bookid+"'");
query.setRange(0, 1);
try {
List<BookImage> results = (List<BookImage>)
query.execute();
if (results.iterator().hasNext()) {
// If the results list is non-empty, return the first
(and only)
// result
return results.get(0);
}
} finally {
query.closeAll();
}
return null;
}
>
> On 22 oct, 05:34, Didier Durand <[email protected]> wrote:
>
> > Hi Erik,
>
> > To check (and then limit) the format, you can extract the picture from
> > the mail as a byte[] and then use this byte[] to create an image via
> > ImagesService.makeImage(byte[]) and then do Image.getFormat() to see
> > if you accept the format or not.
>
> > regards
> > didier
>
> > On Oct 21, 1:43 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.
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