Downloading an Image from servlet

[Alex Parvan]

Hi, i have a servlet that does the following in it's doGet method:

            ImageIO.write(image, "png", baos);
            bytesImage = baos.toByteArray();
            response.setContentType("image/png");
            response.setContentLength(bytesImage.length);
            OutputStream os = response.getOutputStream();
            os.write(bytesImage);
            os.close();

I can't change the servlet code. I need a client that will read the image, i have already tried the following:

URL url = new URL(servletUrl);
conn = url.openConnection();
conn.setDoInput(true);
int length = conn.getContentLength();
byte[] data = new byte[0];
if (length != -1) {
    data = new byte[length];
    dis = new DataInputStream(conn.getInputStream());
    dis.readFully(data);
}
img = Toolkit.getDefaultToolkit().createImage(data, 0, data.length);

Although all of the bytes get through, the image created has width and height -1.
Can anybody help ?
Thanks,
Alex.

[Rob Spoor]

That means it's not a valid image. If you save the contents to a file, can you then open the file in your default program for PNG images?

[Alex Parvan]

Rob Prime wrote:That means it's not a valid image.

Thanks for the response. That's impossible, because i download the exact same image (using that servlet) onto a j2me application and it shows.

[Rob Spoor]

I'm not saying the image on the server is invalid. I'm saying the image on the client is invalid.

[Alex Parvan]

I just tried that. It's funny cause if i use a code i found on the internet to convert Image to BufferedImage, it's working, i can see the image. Thanks, i couldn't do it without your help

But... Once i remove the conversion, i don't see it anymore.

And i can't tell what happens there that makes it show. If i post the conversion method here, you think you can spot why i can see the image only after the conversion ?

[Alex Parvan]

Ok, so if i do this:

Image image = Toolkit.getDefaultToolkit().createImage(data, 0, data.length);
Image img = image;

I can see "img" but not "image". Wierd.