CookieMIDlet.java Source code

Introduction

Here is the source code for CookieMIDlet.java

Source

/*
Wireless Java 2nd edition 
Jonathan Knudsen
Publisher: Apress
ISBN: 1590590775 
*/

import java.io.*;

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

public class CookieMIDlet extends MIDlet implements CommandListener, Runnable {
    private Display mDisplay;
    private Form mForm;

    private String mSession;

    public void startApp() {
        mDisplay = Display.getDisplay(this);

        if (mForm == null) {
            mForm = new Form("CookieMIDlet");

            mForm.addCommand(new Command("Exit", Command.EXIT, 0));
            mForm.addCommand(new Command("Send", Command.SCREEN, 0));
            mForm.setCommandListener(this);
        }

        mDisplay.setCurrent(mForm);
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command c, Displayable s) {
        if (c.getCommandType() == Command.EXIT)
            notifyDestroyed();
        else {
            Form waitForm = new Form("Connecting...");
            mDisplay.setCurrent(waitForm);
            Thread t = new Thread(this);
            t.start();
        }
    }

    public void run() {
        String url = getAppProperty("CookieMIDlet-URL");

        try {
            // Query the server and retrieve the response.
            HttpConnection hc = (HttpConnection) Connector.open(url);
            if (mSession != null)
                hc.setRequestProperty("cookie", mSession);
            InputStream in = hc.openInputStream();

            String cookie = hc.getHeaderField("Set-cookie");
            if (cookie != null) {
                int semicolon = cookie.indexOf(';');
                mSession = cookie.substring(0, semicolon);
            }

            int length = (int) hc.getLength();
            byte[] raw = new byte[length];
            in.read(raw);

            String s = new String(raw);
            Alert a = new Alert("Response", s, null, null);
            a.setTimeout(Alert.FOREVER);
            mDisplay.setCurrent(a, mForm);

            in.close();
            hc.close();
        } catch (IOException ioe) {
            Alert a = new Alert("Exception", ioe.toString(), null, null);
            a.setTimeout(Alert.FOREVER);
            mDisplay.setCurrent(a, mForm);
        }
    }
}