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Dooj

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Security Exception - Whats wrong with my code?

Hello,

Could some one tell me what is wrong with the following code? It is driving me mad. It compiles ok but gives an error when I start the applet.



import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;

public class ThreadTest extends Applet
{
  public void init()
  {
   try
   {
    url = new StringBuffer();
    readurl = new URL("http://xxx.cxxx.net/me/test.txt");
    newurl = "http://www.yyy.com";
    System.out.println("The URL is " + readurl);
    ShowURL show = new ShowURL(newurl,readurl,this);
   }
   catch (IOException e) {    
     System.out.println("Exception error in the prog " + e);}
 }

 class ShowURL extends Thread
 {  
  String redirectUrl;
  URL readUrl;
  Applet applet;
  //InputStream in;
  int a;
  public ShowURL(String redirectUrl, URL readUrl, Applet applet)
  {
   this.redirectUrl = redirectUrl;
   this.readUrl = readUrl;
   this.applet = applet;
   this.start();
  }
  public void run()
  {
   System.out.println("Inside Run");
   try
   {
    System.out.println("Inside Try");
    InputStream in = readUrl.openStream();
    while ((a = in.read()) != -1)
    {
     url.append((char)a);
    }
    //System.out.println("Outside While");
    String str = new String(url);
    if(str.equals(newurl))
    {
     System.out.println("Hoooray!!!");
     URL redirecturl = new URL(str);
     getAppletContext().showDocument(redirecturl);
      this.stop();
    }
    else
    {      
     System.out.println("Try Again!");
     URL redirecturl1 = new URL(redirectUrl);
     getAppletContext().showDocument(redirecturl1);
     this.stop();
    }            
   }catch (Exception e) {System.out.println("Exception error in the prog " + e);
   //      e.printStackTrace();
   }      
                    

 }
   
}    
 

Thread thread;
String line;
// int a;
StringBuffer url;
String newurl;
URL readurl;
// InputStream in;
// ShowUrl show;
 }


Thanks for your help.

DD
Avatar of imladris
imladris
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I would expect this applet to give a security error. Unless an applet is signed it can only access the machine it was loaded from.
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s_franklin

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Dooj

ASKER

Yeah, that makes sense. So, if I load this in the same server as the text file (which has to be read) I should not get this error, right?

Anyway, thanks heaps Steve.

Cheers, DD :-)