Cookie MIDlet : Networks « J2ME « Java

1. Java
2. J2ME
3. Networks

Cookie 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.*;

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);
    }
  }
}

           
       

Related examples in the same category

1.	MIDlet to invoke a CGI script.
2.	MIDlet to invoke a CGI script (POST method is used)
3.	Https MIDlet
4.	Pass a cookie (stored in rms) between the MIDlet and a Java servlet.
5.	Use GET or POST to communicate with a Java servlet.
6.	Use Java servlets sessions to tally golf scores.
7.	Http Test
8.	An example MIDlet to invoke a CGI script.
9.	Timer Server
10.	Http Example
11.	Socket connection
12.	Http Connection
13.	Jargoneer
14.	Post MIDlet
15.	Patchy MIDlet
16.	MIDlet to invoke a CGI script (GET method).
17.	Fetch Page Midlet
18.	Invoke Servlet Midlet 2
19.	Invoke Servlet Midlet 1
20.	MIDlet to invoke a CGI script (POST method is used) (2)
21.	Demonstrates the functionality of DatagramConnection framework.
22.	Sample to demonstrate Http GET and POST from MIDlet
23.	Get file from network
24.	Midlet Servlet 2
25.	MIDlet to fetch a page using an HttpConnection
26.	A simple network client
27.	Send client request and Get server response
28.	Socket MIDlet
29.	www.amazon.com Book Ranking MIDlet
30.	Time Server
31.	Http MIDlet
32.	DatagramSender
33.	Datagram Receiver