17442 - Java and JavaScript programs cannot communicate with plugins

Status: VERIFIED INVALID

(Core Graveyard :: Java: Live Connect, defect, P3)

Description

[Igor Mironov]

This bug manifests itself in Communicator 4.6 only.
The problem is that Java programs cannot obtain the Plugin pointer, regardless
of the Plugin being used---be it npavi32.dll or npcortona.dll or any other. The
steps for obtaining a Plugin pointer are following:
public static Plugin getPlugin()
{
    try
    {
        JSObject window = JSObject.getWindow(this);
        JSObject document = (JSObject) window.getMember("document");
        JSObject embeds = (JSObject) document.getMember("embeds");
        return (Plugin) embeds.getSlot(0);
    }
    catch (Throwable e)
    {
        return null;
    }
}

This fails at window.getMember("document"), getting strange exceptions, like
this:
netscape.security.AppletSecurityException: security.checkcreateclassloader
  at java.lang.Throwable.<init>(Compiled Code)
  at java.lang.Exception.<init>(Compiled Code)
  at java.lang.RuntimeException.<init>(Compiled Code)
  at java.lang.SecurityException.<init>(Compiled Code)
  at netscape.security.AppletSecurityException.<init>(Compiled Code)
  at netscape.security.AppletSecurity.checkCreateClassLoader(Compiled Code)
  at java.lang.SecurityManager.checkCreateClassLoader(Compiled Code)
  at java.lang.ClassLoader.<init>(Compiled Code)
  at netscape.applet.AppletClassLoader.<init>(Compiled Code)
* at netscape.applet.AppletClassLoader.getClassLoader(Compiled Code)
  at Avi.getPlugin(Compiled Code)
  at Avi.start(Compiled Code)
  at netscape.applet.DerivedAppletFrame$StartAppletEvent.dispatch(Compiled Code)
  at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)
  at java.awt.EventDispatchThread.run(Compiled Code)
  at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled
Code)
Browser.getBrowser() failed: netscape.javascript.JSException: couldn't create
AppletClassLoader for JavaScript

Or like this:
netscape.javascript.JSException: couldn't create AppletClassLoader for
JavaScript
  at java.lang.Exception.<init>(Compiled Code)
* at netscape.javascript.JSException.<init>(Compiled Code)
  at vrml.external.Browser.getBrowser(Compiled Code)
  at vrml.external.Browser.getBrowser(Compiled Code)
  at fjmap.start(Compiled Code)
  at netscape.applet.DerivedAppletFrame$StartAppletEvent.dispatch(Compiled Code)
  at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)
  at java.awt.EventDispatchThread.run(Compiled Code)
  at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled
Code)

It should be emphasized that there were no attempts of creating a ClassLoader
in the body of getPlugin() or getBrowser().

JavaScript program on NPAviExample.html page (which comes with Plugin SDK)
fails with error
"JavaScript error: Type 'javascript:' into Location for details", and the
details are
JavaScript Error:
file:/D|/PluginSDK/Examples/npavi/Testing/NPAviExample.html, line 14:
document.avi has no properties.

Comment 1

[Scott Furman]

This bug reporting system is only for Mozilla, the open-source browser that will
become the basis for the next version of Netscape Navigator.  It may not be used
for Navigator 4 bugs.  Hence, I'm marking this bug INVALID.  To file a bug
against Navigator 4.6, you need to contact Netscape technical support.

Comment 2

[Keyser Sose]

Another 4.6 bug...*sigh*