On the surface your code looks correct, so I am not sure what the problem is.
You could try the following code which has worked for me:

    res.setContentType("text/html");
    PrintWriter out = res.getWriter();

    ServletInputStream in = req.getInputStream();
    byte[] b = new byte[8192];
    ByteArrayOutputStream baos = new ByteArrayOutputStream(8192);

    out.println("<html><body><pre>");

    while (in.readLine(b, 0, 8192) != -1) {
      baos.write(b, 0, 8192);
      out.println(baos.toString());
    }

    out.println("</pre></body></html>");

K Mukhar

Andy Mayer wrote:
>
> Hi all,
>
> I am unsuccessfully trying to display the "raw" HTTP header that gets sent
> to my server.
> I have written the code below, but the BufferedReader returns no data at
> all. In fact
> the print statement displays "Ready: false" indicating there is no data. I
> am running the
> servlet on Oracle Application Server.
>
> All ideas welcome, as I desperately need this to work to troubleshoot a WAP
> gateway.
>
> Regards,
>
> Andy
> ---
> www.andymayer.com
>
> public class Header extends HttpServlet {
>
> public void service ( HttpServletRequest request, HttpServletResponse
> response)
> throws ServletException, IOException {
>
>      response.setContentType("text/html");
>     PrintWriter out = response.getWriter();
>
>     ServletInputStream inStream = request.getInputStream();
>     InputStreamReader inputStreamReader = new InputStreamReader(inStream);
>     out.println("Ready : "+inputStreamReader.ready());
>
>     BufferedReader in = new BufferedReader(inputStreamReader);
>
>     String inputLine;
>     while ((inputLine = in.readLine()) != null) {
>          out.println(inputLine);
> }

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