Name: mt13159 Date: 05/07/2001


In Java plugin 1.3.0_02, if you try to connect to a URL that uses both rediretion and cookies, you get a NullPointerException:

java.lang.NullPointerException
at sun.net.www.protocol.http.HttpURLConnection.followRedirect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.checkCookieHeader(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.getInputStream(Unknown Source)
at CookieBug.init(CookieBug.java:9)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

This can be seen with a very simple test case:

import java.applet.Applet;
import java.net.*;
public class CookieBug extends Applet {
    public void init() {
        try {
            URL u = new URL("http://www.amazon.com/");
            HttpURLConnection c =
                (HttpURLConnection)u.openConnection();
            c.getInputStream();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Put this class into a signed JAR file (so it has permission to make the URL connection) and run it in the plugin, and you will get the above exception. You will of course need to have your proxies configured so you can reach the URL.

This seems to be related to bug 4380178, and the fix recommended in that bug will probably solve this one, too. However, that bug was specifically for HTTP POST, and this is occuring with an HTTP GET.
(Review ID: 120870)
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