[appengine-java] Re: No bytes available in doPost
Hi Dick,
Your suggestions did the trick - thanks ever so much!
Sincerely,
Rune Nielsen
On Oct 27, 9:39 am, Dick Larsson wrote:
> In method uploadAvatarImage you call for the inputStream before you
> have sent your bytes to the server.
> Please try this instead
> os.flush();
> os.close();
> InputStream is = servletConnection.getInputStream();
>
> Next thing, in your servlet.
> You should use InputStream instead of Reader since you are dealing
> with bytes
>
> InputStream reader = request.getInputStream();
> byte[] imageBytes =
> org.apache.commons.io.IOUtils.toByteArray(reader);
>
> Hope it helps
> Best regards
> /Dick Larsson
>
> On 24 Okt, 16:17, Rune Nielsen wrote:
>
>
>
>
>
>
>
> > 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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[appengine-java] Re: No bytes available in doPost
In method uploadAvatarImage you call for the inputStream before you
have sent your bytes to the server.
Please try this instead
os.flush();
os.close();
InputStream is = servletConnection.getInputStream();
Next thing, in your servlet.
You should use InputStream instead of Reader since you are dealing
with bytes
InputStream reader = request.getInputStream();
byte[] imageBytes =
org.apache.commons.io.IOUtils.toByteArray(reader);
Hope it helps
Best regards
/Dick Larsson
On 24 Okt, 16:17, Rune Nielsen wrote:
> 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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