Https MIDlet
/*
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.*;
import javax.microedition.pki.*;
public class HttpsMIDlet extends MIDlet
implements CommandListener, Runnable {
private Display mDisplay;
private Form mForm;
public void startApp() {
mDisplay = Display.getDisplay(this);
if (mForm == null) {
mForm = new Form("HttpsMIDlet");
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("HttpsMIDlet-URL");
try {
// Query the server and retrieve the response.
HttpsConnection hc = (HttpsConnection)Connector.open(url);
SecurityInfo si = hc.getSecurityInfo();
Certificate c = si.getServerCertificate();
String subject = c.getSubject();
String s = "Server certificate subject: \n" + subject;
Alert a = new Alert("Result", s, null, null);
a.setTimeout(Alert.FOREVER);
mDisplay.setCurrent(a, mForm);
hc.close();
}
catch (IOException ioe) {
Alert a = new Alert("Exception", ioe.toString(), null, null);
a.setTimeout(Alert.FOREVER);
mDisplay.setCurrent(a, mForm);
}
}
}
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