IOException

Question

Hi,
I am getting an error while receing a response from the server using Nokia 6235, it throughs an ja.io.IOException: Errror in HTTP operation. It works fine with the WTK emulator. Please if anybody faced this problem and able to solve let me know the soluion.
Thanks,
Sirisha

Answer 1

My phone carrier is Tata. Through tata i can send and receive the request/response for the site http://developers.sun.com/techtopics/mobility/, but when i connect to our weblogic server to send/receive the response to the server i am not able to do that. It through's IOException.
My complete code is
import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class HTTPMIDlet
extends MIDlet
implements CommandListener, Runnable {
private Display mDisplay;
private Form mMainScreen;
public HTTPMIDlet() {
mMainScreen = new Form("HTTPMIDlet");
mMainScreen.append("Press OK to create an HTTP connection.");
Command exitCommand = new Command("Exit", Command.EXIT, 0);
Command okCommand = new Command("OK", Command.OK, 0);
mMainScreen.addCommand(exitCommand);
mMainScreen.addCommand(okCommand);
mMainScreen.setCommandListener(this);
public void startApp() {
if (mDisplay == null)
mDisplay = Display.getDisplay(this);
mDisplay.setCurrent(mMainScreen);
public void pauseApp() {
public void destroyApp(boolean unconditional) {}
// CommandListener method
public void commandAction(Command c, Displayable s) {
if (c.getCommandType() == Command.EXIT)
notifyDestroyed();
else if (c.getCommandType() == Command.BACK)
mDisplay.setCurrent(mMainScreen);
else if (c.getCommandType() == Command.OK) {
// Put up a wait screen.
Form waitForm = new Form("Connecting...");
mDisplay.setCurrent(waitForm);
// Make the connection
Thread t = new Thread(this);
t.start();
// Runnable method
public void run() {
     // String url = "http://wireless.java.sun.com/";
     //String url = "http://developers.sun.com/techtopics/mobility/";
String url = "http://65.200.204.168:7701/WIRELESS/listcountries?scope=registration";
Form resultsForm = new Form("Results");
Command backCommand = new Command("Back", Command.BACK, 0);
resultsForm.addCommand(backCommand);
resultsForm.setCommandListener(this);
HttpConnection hc = null;
// InputStreamReader in = null;
DataInputStream in = null;
try {
// Now make a connection to the server.
hc = (HttpConnection)Connector.open(url);
          String profile = System.getProperty("microedition.profiles");
          String config = System.getProperty("microedition.configuration");
hc.setRequestProperty
                    "User-Agent", "Profile/" + profile + " Configuration/" + config
//                    + " ReverseClient" // not sure if we need this here
               // Set the content headers: length and MIME type
               hc.setRequestProperty("Content-Length", Integer.toString(url.length()));
               hc.setRequestProperty("Content-Type","text/plain; charset=iso-8859-1");
               //hc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
hc.setRequestProperty("Xpherix-User-Agent", "MIDP BC 1.0.0.14 2.1.0 VX-8000");
               hc.setRequestProperty("Content-Language", "en-US");
               hc.setRequestProperty("Accept", "application/octet-stream");
               System.out.println("conn.getResponseCode():"+hc.getResponseCode());
               System.out.println("HttpConnection.HTTP_OK:" +HttpConnection.HTTP_OK);
               System.out.println("hc.getType(): "+hc.getType());
               System.out.println("hc.getURL(): "+hc.getURL());
               System.out.println("hc.getLength(): "+hc.getLength());
// Retrieve the response.
//in = new InputStreamReader(conn.openInputStream(), MConstants.ENCODING);
//in = hc.openInputStream();
     if( hc.getResponseCode() == HttpConnection.HTTP_OK )
in = new DataInputStream(hc.openDataInputStream());
//int length = 256;
//byte[] raw = new byte[length];
//int readLength = in.read(raw);
long length = -1;
StringBuffer buffer = null;
int ch;
String responseStr = null;
length = hc.getLength();
if (length > 0)
// HTTP 1.1 mode with "Connection" header set to "Keep-Alive".
// Read exactly "length" bytes from the connection.
int count = 0;
buffer = new StringBuffer((int) length);
while (count < length)
ch = in.read();
if (ch == -1)
break;
buffer.append((char) ch);
count ++;
else
// HTTP 1.0 mode with connection header set to "Close".
// Read until the end of file is reached.
buffer = new StringBuffer();
while ((ch = in.read()) != -1)
buffer.append((char) ch);
responseStr = buffer.toString();
//String message = new String(responseStr, 0, ch);
resultsForm.append(responseStr);
     }else{
          throw new Exception( "Error connecting to host." );
}catch (Exception e) {
resultsForm.append(new StringItem("Exception: " , e.toString()));
finally {
if (in != null) {
try { in.close(); }
catch (IOException ioe) {}
if (hc != null) {
try { hc.close(); }
catch (IOException ioe) {}
mDisplay.setCurrent(resultsForm);
Thanks
Sirisha