Source Code : Midlet Servlet 2

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Midlet Servlet 2

/* License
 * 
 * Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  
 *  * Redistribution of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 * 
 *  * Redistribution in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *  
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *  
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
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 */

import javax.microedition.rms.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import java.io.*;
import java.util.Vector;

public class SecondMidletServlet extends MIDlet implements CommandListener {
    Display display = null;
    List menu = null; 
    TextBox input = null;
    String user = null;    

    String url = "http://developer.java.sun.com/servlet/RequestServlet";
    static final Command backCommand = new Command("Back", Command.BACK, 0);
    static final Command submitCommand = new Command("Submit", Command.OK, 2);
    static final Command exitCommand = new Command("Exit", Command.STOP, 3);
    String currentMenu = null;

    public SecondMidletServlet() {
    }

    public void startApp() throws MIDletStateChangeException {
      display = Display.getDisplay(this);
      menu = new List("Invoke Servlet", Choice.IMPLICIT);
      menu.append("Add a user", null);
      menu.addCommand(exitCommand);
      menu.setCommandListener(this);
      mainMenu();
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
      notifyDestroyed();
    }

    void mainMenu() {
      display.setCurrent(menu);
    }

    public void addName() {
      input = new TextBox("Enter first name:", "", 5, TextField.ANY);
      input.addCommand(submitCommand);
      input.addCommand(backCommand);
      input.setCommandListener(this);
      input.setString("");
      display.setCurrent(input);
    }

    void invokeServlet(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.setRequestMethod(HttpConnection.POST);
          c.setRequestProperty("IF-Modified-Since", "20 Jan 2001 16:19:14 GMT");
          c.setRequestProperty("User-Agent","Profile/MIDP-1.0 Configuration/CLDC-1.0");
          c.setRequestProperty("Content-Language", "en-CA");
          
          os = c.openOutputStream();
          String str = "name="+user;
          byte postmsg[] = str.getBytes();
          System.out.println("Length: "+str.getBytes());
          for(int i=0;i<postmsg.length;i++) {
            os.write(postmsg[i]);
          }
          // or you can easily do:
          // os.write(("name="+user).getBytes()); 
          os.flush();

          is = c.openDataInputStream();
          int ch;
          while ((ch = is.read()) != -1) {
            b.append((char) ch);
            System.out.print((char)ch);
          }
          t = new TextBox("Second Servlet", b.toString(), 1024, 0);
          t.addCommand(backCommand);
          t.setCommandListener(this);
        } finally {
           if(is!= null) {
              is.close();
           }
           if(os != null) {
              os.close();
           }
           if(c != null) {
              c.close();
           }
        }
        display.setCurrent(t);
    } 

   public void commandAction(Command c, Displayable d) {
      String label = c.getLabel();
      if (label.equals("Exit")) {
         destroyApp(true);
      } else if (label.equals("Back")) {
         mainMenu();
      } else if (label.equals("Submit")) {
         user = input.getString();
         try {
           invokeServlet(url);
         }catch(IOException e) {}
      } else {
        addName();
      } 
   }
}


           
       

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