Unable to read http response from servlet (on nokia 6630 device)

Question

I am sending a http GET request to a servlet for getting some response. Though I am able to obtain the response when I run my j2me app on sony phone I am not able to get any response in case of nokia. On being asked for the APN on nokia I do select the correct one and my settings are correct too. Moreover I am able to connect to the servlet without any problems from my nokia device. However when I tried to read from the Input stream the value returned by read() is -1.
The code works fine on emulator also. Here is the code snippet being used by me. Plz help me solve this problem. Your response shall be definitely appreciated by me.
Code in servlet:
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {       
        String t_username = request.getParameter("user");
        String t_password = request.getParameter("pass");
        URL url = new URL("http://somehost:80/query.cgi?serv=s1&user=" + t_username + "&pass=" + t_password);
        HttpURLConnection head = (HttpURLConnection)url.openConnection();
        head.connect();
        int contentLen = head.getContentLength();
        System.out.println("content length = " + contentLen); //here I get some content length value as expected
        BufferedReader in = new BufferedReader(new InputStreamReader(head.getInputStream()));
        StringBuffer sb = new StringBuffer(contentLen);
        String data = null;
        final String NEWLINE = "\r\n"; //acts as delimiter for parsing response later in my j2me code
        while((data = in.readLine()) != null)
            sb.append(data).append(NEWLINE);
        sb.append(NEWLINE);
        in.close();
        PrintWriter out = response.getWriter();
        out.print(sb.toString());
        out.flush();
        out.close();
        head.disconnect();
    }Code in J2ME:
public static byte[] readFromHttpConnection(String p_URL) throws ConnectionNotFoundException, IOException {
        if(p_URL.startsWith("http://") || p_URL.startsWith("https://")) {
            HttpConnection c = null;
            DataInputStream dis = null;   //tried using InputStream also...still value returned by read() is -1
            c = (HttpConnection)Connector.open(p_URL);
            c.setRequestMethod(HttpConnection.GET);
            c.setRequestProperty("Content-Type", "application/octet-stream");
            dis = c.openDataInputStream();   //able to open this stream
            int len = (int)c.getLength();    //here i get len as -1 for both sony and nokia
            byte[] t_data = null;
            if(len > 0)
                t_data = new byte[len];
                int offset = 0;
                int numRead = 0;
                while((numRead = dis.read(t_data, offset, t_data.length-offset)) > 0) {
                    offset += numRead;
            else //since i get content length as -1 for both sony and nokia, this block is executed, and though
                   //I am able to read data on sony on nokia read() returns value -1 from the start itself
                ByteArrayOutputStream bs = new ByteArrayOutputStream();
                int ch;
                while((ch = dis.read()) != -1)
                    bs.write(ch);
                t_data = bs.toByteArray();
            dis.close();
            c.close();
            dis = null;
            c = null;
            return t_data;
        return null;
    }Edited by: alprazolam on Oct 16, 2007 6:02 AM
Edited by: alprazolam on Oct 16, 2007 6:04 AM
Edited by: alprazolam on Oct 16, 2007 6:07 AM

Answer 1

Strange, this should be fine. You might want to try a more efficient (and shorter and faster) read code:
byte[] buffer = new byte[512];
ByteArrayOutputStream  = new ByteArrayOutputStream();
int b;
while((b=dis.read(buffer))!=-1){
  bs.write(buffer,0,b);
t_data = bs.toByteArray();No need to check for content length, and always fast. I hope this helps...