cookiemidlet.java

一组http交互程序 ConnectHttpMIDlet HttpCookieMIDlet.java HttpGETMIDlet.java HttpHEADMIDlet.java Ht

import java.io.*;

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

public class CookieMIDlet extends MIDlet {
  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(new CommandListener() {
        public void commandAction(Command c, Displayable s) {
          if (c.getCommandType() == Command.EXIT) notifyDestroyed();
          else send();
        }
      });
    }

    mDisplay.setCurrent(mForm);
  }

  private void send() {
    // Create the GET URL. Our user name and the encrypted, hex
    //   encoded message are included as parameters. The user name
    //   and base URL are retrieved as application properties.
    String url = "http://localhost/JIDCA/all_http.asp";

    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);
    }
  }

  public void pauseApp() {}

  public void destroyApp(boolean unconditional) {}
}