Programming Forums - Small Applet Problem

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- - Small Applet Problem (http://www.programmingforums.org/showthread.php?t=13423)

Small Applet Problem

I'm trying to create an applet which retrieves information from a foreign url. I'm not entirely sure that this is even allowable however, because my code generates the following exception:

exception: java.lang.RuntimeException: java.security.AccessControlException: access denied (java.net.SocketPermission cache.pando.com:80 connect,resolve).

And here's the code for the applet:

import java.awt.*;

import javax.swing.*;



import java.net.URL;

import java.net.URLConnection;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.io.IOException;

import java.io.BufferedReader;

import java.io.InputStream;

import java.io.InputStreamReader;



public class URLGet extends JApplet

{

    private String input;



    public void start()

    {

        try

        {

            URL u = new URL("http://cache.pando.com/soapservices/SendToWeb?action=info&format=json&id=5AEDE982393976A10050F2EC7C20C3C5EFDE0BBB&key=C51E9F2767B6747A9C9841AF7EEB9CC0E967D5B37CEC05B8C9DF310A03958AD2");

            URLConnection connection = u.openConnection();

            

            HttpURLConnection httpConnection = (HttpURLConnection)connection;

            int code = httpConnection.getResponseCode();

            

            if(code != HttpURLConnection.HTTP_OK)

            {

                throw new MalformedURLException("HTTP_OK failed");

            }

            

            InputStream in = connection.getInputStream();

            BufferedReader reader = new BufferedReader(new InputStreamReader(in));

        

            boolean done = false;

            input = "";

            while(!done)

            {

                input += reader.readLine();

                if(input == null) done = true;

            }

        }

        catch(MalformedURLException u)

        {

            input = "MalformedURLException";

        }

        catch(IOException e)

        {

            input = "IOException";

        }

    }



    public void paint(Graphics g)

    {

        g.setColor(Color.white);

        g.fillRect(0, 0, 200, 100);

        g.setColor(Color.black);

        g.drawString(input, 20, 20);

        

    }

}

There was a similar "can't do this in Java" thread a short time back, and andro posted a nice link in response. See post #5 in this thread.

The short answer: you can't open a socket connection to a foreign site from the applet. If you're able to implement server-side code, you can always have the server do it (and if possible, cache results to reduce overhead).

[edit] Regarding your other post, it seems server-side code isn't viable, either. Hate to say it, but it sounds like you're screwed. Have you considered switching your web hosting? [/edit]

yeah seems to be that switching web hosting is the only way to go. I was thinking Flash to work with XML, but flash has the same limitation. It can only read XML files on the domain. I may just have to get users to paste the actual content of the URL as opposed to trying to get my script to do all the work for them. I could use the javascript api, but I don't like to use javascript at all since I usually surf with javascript disabled.