Connecting to the World - Beginning J2ME: From Novice to Professional - page 152

■ Note In some applications, a server may return multiple cookie values. RFC 2965 has provisions for this.

In these cases, the cookie string parsing code can be considerably more complex than this example.

Listing 10-4 shows a class, CookieMIDlet , that uses this technique to maintain a session
with a server. It has a very bland user interface—just an empty Form with two commands. If you
invoke the Send command, the MIDlet sends an HTTP request and receives a response using
the cookie handling described earlier.

Listing 10-4. Saving a Server Session ID Cookie

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) {}