import java.awt.*; 
import java.applet.*;
import java.net.*;
import java.io.*;
import java.net.MalformedURLException;
import java.awt.Component;
import javax.imageio.ImageIO;
import java.lang.Thread;

public class web_imagesUnleashed extends Applet implements Runnable
{
  Image img;
  Thread t; 
  public void init() 
  {      
      System.out.println("init");
      this.setSize(1024, 768);
  }

  public void start()
  {
     t = new Thread(this);
     t.start();
  }

  public void run ()
  {
      String statusStr = getText("http://community-info.org/FileStatus.txt");
      while (true)
       {
          if (statusStr.indexOf("Wrote") != -1)
          {
             repaint(0,0, 1024, 768);          //the perl script wrote a new image url, so display it
             writeText();      //Write "Read" to http://community-info.org/FileStatus.txt, too let the perl script write again                                 
          }
          try
          {
             t.sleep(1);
          }
          catch (Exception e) 
          {
             System.err.println(e); 
             System.out.println("Failed to run");
          }
          statusStr = getText("http://community-info.org/FileStatus.txt");          
      }
  }  // end of init() method


public void paint(Graphics g)
{
   System.out.println("paint");
   URL url;
   try
   {          
      String urlStr = getText("http://community-info.org/unleashed.txt");    
      url = new URL(urlStr);     
      img = ImageIO.read(url);
      System.out.println("Write the image to the web page");     
      g.drawImage(img, 0, 0,this);      
      System.out.println("Wrote");     
   }
   catch (Exception e) 
   {
      System.out.println("Failed to paint");
      System.err.println(e); 
   }    
}

public void writeText()
{
    System.out.println("writeText");
    String tempStr = "";   
    try
    {         
       OutputStream to_file = System.out;   // so we can see this as it takes place

      //Now use the URL class to parse the user-specified URL into
      //it's various parts      
      URL url = new URL("http://community-info.org/FileStatus.asp");
      
      String host = url.getHost();
      int port = 80;
      String filename = url.getFile();

      //create the socket
      Socket socket = new Socket(host, port);

      //get input and output streams for the socket
      InputStream from_server = socket.getInputStream();
      PrintWriter to_server = new PrintWriter(socket.getOutputStream());

      //send a GET to the web server
      to_server.print("GET " + filename + "\n\n");
      to_server.flush();

      //read the server's response      
      int bytes_read;
      byte [] localBuffy = new byte[4096];
      while ((bytes_read = from_server.read(localBuffy)) != -1)
      {
         to_file.write(localBuffy, 0, bytes_read);
         String localStr = new String(localBuffy);
         tempStr += localStr; 
      }
      //finished reading from the server; close up
      socket.close();
      to_file = null;
    }
    catch (Exception e)
    {
       System.out.print("Failed to writeText");
       System.err.println(e);     
    }      
}

public String getText (String FileName)
{
  System.out.println("getText"); 
  String text = ""; 
  try
  {
    URL                url; 
    URLConnection      urlConn; 
    DataInputStream    dis;

    url = new URL(FileName);

    urlConn = url.openConnection(); 
    urlConn.setDoInput(true); 
    urlConn.setUseCaches(false);

    dis = new DataInputStream(urlConn.getInputStream()); 
    String s;     
  
    while ((s = dis.readLine()) != null)
    { 
      text += s; 
    } 
      dis.close();
      urlConn = null;
      url = null;       
    }    
    catch (MalformedURLException mue) 
    {
        System.out.println("MalformedURLException during getText"); 
        System.err.println(mue); 
    } 
    catch (IOException ioe) 
    {
        System.out.println("IOException during getText");
        System.err.println(ioe); 
    }     
    return text;
  }      
}