MIDlet to invoke a CGI script (POST method is used) : Networks « J2ME « Java

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Java » J2ME » Networks 




MIDlet to invoke a CGI script (POST method is used)


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 */

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

/**
 * An example MIDlet to invoke a CGI script (POST method is used).
 */

public class PostMidlet extends MIDlet {

    private Display display;

    String url = "http://developer.java.sun.com/cgi-bin/pgrade.cgi";

    public PostMidlet() {
       display = Display.getDisplay(this);
    }

    /**
     * Initialization. Invoked when we activate the MIDlet.
     */
    public void startApp() {
  try {
            getGrade(url);
  catch (IOException e) {
      System.out.println("IOException " + e);
      e.printStackTrace();
  }
    }

    /**
     * Pause, discontinue ....
     */
    public void pauseApp() {
  
    }

    /**
     * Destroy must cleanup everything.
     */
    public void destroyApp(boolean unconditional) {
    }

    /**
     * Retrieve a grade....
     */

     void getGrade(String urlthrows IOException {
        HttpConnection c = null;
        InputStream is = null;
        OutputStream os = null;
        StringBuffer b = new StringBuffer();
        TextBox t = null;
        try {
          c = (HttpConnection)Connector.open(url);
          c.setRequestMethod(HttpConnection.POST);
          c.setRequestProperty("IF-Modified-Since""20 Jan 2001 16:19:14 GMT");
          c.setRequestProperty("User-Agent","Profile/MIDP-1.0 Configuration/CLDC-1.0");
          c.setRequestProperty("Content-Language""en-CA");
          os = c.openOutputStream();

          //start
          String str = "name=163748";
          byte postmsg[] = str.getBytes();
          for(int i=0;i<postmsg.length;i++) {
            os.write(postmsg[i]);
          }
          os.flush();
          //end

          is = c.openDataInputStream();
          int ch;
          while ((ch = is.read()) != -1) {
            b.append((charch);
            System.out.println((char)ch);
          }
          t = new TextBox("Final Grades", b.toString()10240);
        finally {
           if(is!= null) {
              is.close();
           }
           if(os != null) {
              os.close();
           }
           if(c != null) {
              c.close();
           }
        }
        display.setCurrent(t);
    }     
}


           
       














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