Can't post to Mircrosoft IIS machines

Question

Hi I am using the following code from a tutorial. But it blows up every time after a second POST. But I can post as many times as I need to a linux box or any other UNIX boxes I can think of.
What is going on? Why does it not work with microsoft products?
* HttpMidlet.java
* Created on October 23, 2001, 11:19 AM
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;
import java.io.*;
* @author kgabhart
* @version
public class HttpMidlet extends MIDlet implements CommandListener {
// A default URL is used. User can change it from the GUI
private static String defaultURL = "http://www.microsoft.com";
// Main MIDP display
private Display myDisplay = null;
// GUI component for entering a URL
private Form requestScreen;
private TextField requestField;
// GUI component for submitting request
private List list;
private String[] menuItems;
// GUI component for displaying server responses
private Form resultScreen;
private StringItem resultField;
// the "send" button used on requestScreen
Command sendCommand;
// the "exit" button used on the requestScreen
Command exitCommand;
// the "back" button used on resultScreen
Command backCommand;
public HttpMidlet(){
// initialize the GUI components
myDisplay = Display.getDisplay( this );
sendCommand = new Command( "SEND", Command.OK, 1 );
exitCommand = new Command( "EXIT", Command.OK, 1 );
backCommand = new Command( "BACK", Command.OK, 1 );
// display the request URL
requestScreen = new Form( "Type in a URL:" );
requestField = new TextField( null, defaultURL, 100, TextField.URL );
requestScreen.append( requestField );
requestScreen.addCommand( sendCommand );
requestScreen.addCommand( exitCommand );
requestScreen.setCommandListener( this );
// select the HTTP request method desired
menuItems = new String[] {"GET Request", "POST Request"};
list = new List( "Select an HTTP method:", List.IMPLICIT, menuItems, null );
list.setCommandListener( this );
// display the message received from server
resultScreen = new Form( "Server Response:" );
resultScreen.addCommand( backCommand );
resultScreen.setCommandListener( this );
}//end HttpMidlet()
public void startApp() {
myDisplay.setCurrent( requestScreen );
}//end startApp()
public void commandAction( Command com, Displayable disp ) {
// when user clicks on the "send" button
if ( com == sendCommand ) {
myDisplay.setCurrent( list );
} else if ( com == backCommand ) {
// do it all over again
requestField.setString( defaultURL );
myDisplay.setCurrent( requestScreen );
} else if ( com == exitCommand ) {
destroyApp( true );
notifyDestroyed();
}//end if ( com == sendCommand )
if ( disp == list && com == List.SELECT_COMMAND ) {
String result;
if ( list.getSelectedIndex() == 0 ) { // send a GET request to server
System.out.println("getHTTP");
result = sendHttpGet( requestField.getString() );
else // send a POST request to server
System.out.println("postHTTP");
result = sendHttpPost( requestField.getString() );
resultField = new StringItem( null, result );
resultScreen.append( resultField );
myDisplay.setCurrent( resultScreen );
}//end if ( dis == list && com == List.SELECT_COMMAND )
}//end commandAction( Command, Displayable )
private String sendHttpGet( String url )
HttpConnection hcon = null;
DataInputStream dis = null;
StringBuffer responseMessage = new StringBuffer();
try {
// a standard HttpConnection with READ access
hcon = ( HttpConnection )Connector.open( url );
// obtain a DataInputStream from the HttpConnection
dis = new DataInputStream( hcon.openInputStream() );
// retrieve the response from the server
int ch;
while ( ( ch = dis.read() ) != -1 ) {
responseMessage.append( (char) ch );
}//end while ( ( ch = dis.read() ) != -1 )
catch( Exception e )
e.printStackTrace();
responseMessage.append( "ERROR" );
} finally {
try {
if ( hcon != null ) hcon.close();
if ( dis != null ) dis.close();
} catch ( IOException ioe ) {
ioe.printStackTrace();
}//end try/catch
}//end try/catch/finally
return responseMessage.toString();
}//end sendHttpGet( String )
private String sendHttpPost( String url )
HttpConnection hcon = null;
DataInputStream dis = null;
OutputStream os = null;
StringBuffer responseMessage = new StringBuffer();
// the request body
String requeststring = "This is a POST.";
try {
hcon = (HttpConnection)Connector.open(url);
byte [] data = "TextField=Hello&TextField2=Hello2&Submit=Submit".getBytes ();
hcon.setRequestMethod(HttpConnection.POST);
hcon.setRequestProperty("User-Agent","Profile/MIDP-1.0 Configuration/CLDC-1.0");
hcon.setRequestProperty("Content-Language","en-US");
hcon.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
os = hcon.openOutputStream ();
os.write (data);
os.close ();
//conn.close ();
// obtain DataInputStream for receiving server response
dis = new DataInputStream( hcon.openInputStream() );
// retrieve the response from server
int ch;
while( ( ch = dis.read() ) != -1 ) {
responseMessage.append( (char)ch );
}//end while( ( ch = dis.read() ) != -1 ) {
catch( Exception e )
e.printStackTrace();
responseMessage.append( "ERROR" );
finally {
// free up i/o streams and http connection
try {
if( hcon != null ) hcon.close();
if( dis != null ) dis.close();
if( os != null ) os.close();
} catch ( IOException ioe ) {
ioe.printStackTrace();
}//end try/catch
}//end try/catch/finally
return responseMessage.toString();
}//end sendHttpPost( String )
private String xsendHttpPost( String url )
HttpConnection hcon = null;
DataInputStream dis = null;
DataOutputStream dos = null;
StringBuffer responseMessage = new StringBuffer();
// the request body
String requeststring = "This is a POST.";
try {
// an HttpConnection with both read and write access
hcon = ( HttpConnection )Connector.open( url, Connector.READ_WRITE );
// set the request method to POST
hcon.setRequestMethod( HttpConnection.POST );
//hcon.setRequestProperty("Content-length", ""+ requeststring.length() );
hcon.setRequestProperty("Content-type","application/x-www-form-urlencoded");
//hcon.setRequestProperty("Content-language", "en-US"); // should be config.
//hcon.setRequestProperty("Accept", "text/xml");
//hcon.setRequestProperty("Connection", "close");
// obtain DataOutputStream for sending the request string
dos = hcon.openDataOutputStream();
byte[] request_body = requeststring.getBytes();
// send request string to server
for( int i = 0; i < request_body.length; i++ ) {
dos.writeByte( request_body[i] );
}//end for( int i = 0; i < request_body.length; i++ )
// obtain DataInputStream for receiving server response
dis = new DataInputStream( hcon.openInputStream() );
// retrieve the response from server
int ch;
while( ( ch = dis.read() ) != -1 ) {
responseMessage.append( (char)ch );
}//end while( ( ch = dis.read() ) != -1 ) {
catch( Exception e )
e.printStackTrace();
responseMessage.append( "ERROR" );
finally {
// free up i/o streams and http connection
try {
if( hcon != null ) hcon.close();
if( dis != null ) dis.close();
if( dos != null ) dos.close();
} catch ( IOException ioe ) {
ioe.printStackTrace();
}//end try/catch
}//end try/catch/finally
return responseMessage.toString();
}//end sendHttpPost( String )
public void pauseApp() {
}//end pauseApp()
public void destroyApp( boolean unconditional ) {
// help Garbage Collector
myDisplay = null;
requestScreen = null;
requestField = null;
resultScreen = null;
resultField = null;
}//end destroyApp( boolean )
}//end HttpMidlet

Answer 1

Modified your code on the line:
dos.writeByte( request_body );
to:
dos.write( request_body );
and it works with 2 Microsoft IIs servers. I don't know if you ever got this working or if you went to a GET method but we were having major difficulties with IIs servers as well. I figured late was better than never for a response.