[appengine-java] No bytes available in doPost

[Rune Nielsen]

Hi,

I'm trying to upload an image to store in the Blobstore, but I'm having 
trouble streaming it to my servlet as a byte array.

Here's the code for the client method streaming the byte array to the 
servlet - it's using the Commons IO:

public void uploadAvatarImage(byte[] imageBytes) {
        try {
            URL myURL = new 
URL("http://myapp.appspot.com/SetAvatar?globalId=1";);
            URLConnection servletConnection = myURL.openConnection();
            
            servletConnection.setRequestProperty("Content-Type", 
"application/octet-stream");
            
            servletConnection.setDoOutput(true);
            servletConnection.setDoInput(true);

            OutputStream os = servletConnection.getOutputStream();
            InputStream is = servletConnection.getInputStream();
            
            IOUtils.write(imageBytes, os);
            
            os.flush();
            os.close();
            
            BufferedReader in = new BufferedReader(new 
InputStreamReader(is));
            String inputLine;

            while ((inputLine = in.readLine()) != null) {
                System.out.println(inputLine);
            }
            
            in.close();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }

Here's the code for the doPost method of my servlet:

    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse 
response) throws IOException, ServletException {
        BufferedReader reader = request.getReader();
        byte[] imageBytes = IOUtils.toByteArray(reader);
        
        PrintWriter outputWriter = response.getWriter();

        int len = ;
        outputWriter.println("Content type is: " + request.getContentType() 
+ " - length is: " + request.getContentLength());
        outputWriter.println("Bytes: " + imageBytes.length);

        outputWriter.close();
    }

The output from the servlet is:

Content type is: application/octet-stream - length is 0
Bytes: 0

Everything looks good on the client side and the size of the byte array on 
the client size is about 300kb. But for some reason there's no available 
bytes on the server side. Any ideas why? I've tried just about everything, 
but to no avail.

Thanks in advance for any hints!

Sincerely,
Rune Nielsen

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