MIDlet to invoke a CGI script (GET method). : Networks « J2ME « Java

MIDlet to invoke a CGI script (GET method).

MIDlet to invoke a CGI script (GET method).
Learning Wireless Java
Help for New J2ME Developers
By Qusay Mahmoud
ISBN: 0-596-00243-2

import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

 * An example MIDlet to invoke a CGI script (GET method).

public class InvokeCgiMidlet1 extends MIDlet {

   private Display display;

   String url = "http://www.javacourses.com/cgi-bin/getgrade.cgi?idnum=182016";

   public InvokeCgiMidlet1() {
      display = Display.getDisplay(this);

    * Initialization. Invoked when we activate the MIDlet.
   public void startApp() {
      try {
      } catch (IOException e) {
         System.out.println("IOException " + e);

    * Pause, discontinue ....
   public void pauseApp() {

    * Destroy must cleanup everything.
   public void destroyApp(boolean unconditional) {

    * Retrieve a grade....

   void getGrade(String url) throws IOException {
      HttpConnection c = null;
      InputStream is = null;
      OutputStream os = null;
      StringBuffer b = new StringBuffer();
      TextBox t = null;
      try {
         c = (HttpConnection)Connector.open(url);
         c.setRequestProperty("User-Agent","Profile/MIDP-1.0 Confirguration/CLDC-1.0");
         c.setRequestProperty("Content-Language", "en-CA");
         os = c.openOutputStream();
          String str = "?idnum=182016";
          byte postmsg[] = str.getBytes();
          for(int i=0;i<postmsg.length;i++) {
         is = c.openDataInputStream();
         int ch;
         while ((ch = is.read()) != -1) {
            b.append((char) ch);
         t = new TextBox("Final Grades", b.toString(), 1024, 0);
      } finally {
         if(is!= null) {
         if(os != null) {
         if(c != null) {


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