Permissions Error Dispite using a Signed Jar

Question

I have developed a PC program that has a built in web server for talking with and relaying command to a device attached to the COM port. Now Right now I'm using JavaScript to talk with the programs web interface. Now this brought browser compatibility issues though, because commands could be relayed to the programs web interface from a cross domain. Dispite adding in the needed header output records to allow it. Only one browser had the ability to do this. So I created a extremely basic java applet that just opens the web pages on the programs web server and returns the output from the web server to a Javascript function on the parent document to be handled as needed.
Now while this worked great going from localhost to localhost. I then moaved the applet to another computer on the network and tired localhost again and got:
java.security.AccessControlException: access denied (java.net.SocketPermission localhost:988 connect,resolve).Well at first I thought "Oh I forgot to sign the jar." So i signed the jar file and it still kicked back the same error.
Now the only way i could get rid of the error was adding a policy entry, but that is not acceptable because of a number of reasons. So it could very well be something in my code. Though I'm not sure. As you can see below it is very simplistic.
public void CallTimeServ(String Target)
         URL                url;
         URLConnection      urlConn;
         DataInputStream    dis;
           try {
               url = new URL(Target);
               urlConn = url.openConnection();
              urlConn.setDoInput(true);
              urlConn.setUseCaches(false);
              dis = new DataInputStream(urlConn.getInputStream());
              String JSon;
              while ((JSon = dis.readLine()) != null)
                   ContentsRetrived(JSon);
              dis.close();
          } catch (MalformedURLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (IOException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
     public void ContentsRetrived(String msg)
          try
               msg = msg.replace("'", "\'");
               getAppletContext().showDocument(new URL("javascript:ContentsRetrived('" + msg +"')"));
          catch (MalformedURLException me) { }
     public void init()
    }So any one have any ideal on how to to do this. With out requiring a policy file entry?

Answer 1

Phil - did you check out http://otn.oracle.com/products/forms/pdf/SigningJint13.pdf
regards
Grant Ronald
Forms Product Management