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From: "ECS Engineering" <[EMAIL PROTECTED]>
Reply-To: "Batik Users" <[EMAIL PROTECTED]>
To: "Batik Users" <[EMAIL PROTECTED]>
Subject: Re: applet AccessControlException loading Rhino (js.jar is in archive)
Date: Thu, 22 Jan 2004 18:52:27 -0500
That worked in my applet on both the Linux console and my Windows PC. All I
changed was the 1st line of the RhinoInterpreter constructor per your
suggestion as follows:
public RhinoInterpreter(URL documentURL) { rhinoClassLoader = new RhinoClassLoader(documentURL, getClass().getClassLoader());
=> changed to:
public RhinoInterpreter(URL documentURL) { try { rhinoClassLoader = new RhinoClassLoader(documentURL, getClass().getClassLoader()); } catch (Exception ex) { rhinoClassLoader = null; }
I did not change "return rhinoClassLoader.getAccessControlContext();", etc. I then displayed the "3D.svg" sample. I tried switching back to "js.jar" with the "optimizer" directory and got a NullPointerException.
Thanks for the help.
Stan Dickerson ----- Original Message ----- From: "Thomas DeWeese" <[EMAIL PROTECTED]> To: "Batik Users" <[EMAIL PROTECTED]> Sent: Thursday, January 22, 2004 8:30 AM Subject: Re: applet AccessControlException loading Rhino (js.jar is in archive)
> ECS Engineering wrote:
>
> > I'm missing something. I ran "jar xf js.jar" to extract the files, then
> > deleted the org/mozilla/javascript/optimizer directory. [...]
> > I'm still getting:
> >
> > java.security.AccessControlException: access denied
> > (java.lang.RuntimePermission createClassLoader)
> > at java.security.AccessControlContext.checkPermission(Unknown Source)
> > at java.security.AccessController.checkPermission(Unknown Source)
> > at java.lang.SecurityManager.checkPermission(Unknown Source)
> > at java.lang.SecurityManager.checkCreateClassLoader(Unknown Source)
> > at java.lang.ClassLoader.<init>(Unknown Source)
> > at java.security.SecureClassLoader.<init>(Unknown Source)
> > at java.net.URLClassLoader.<init>(Unknown Source)
> > at org.apache.batik.script.rhino.RhinoClassLoader.<init>(Unknown Source)
> > at org.apache.batik.script.rhino.RhinoInterpreter.<init>(Unknown Source)
>
> Yup, you need to change some code in RhinoInterpreter. It
> 'nakedly' constructs the RhinoClassLoader - it shouldn't do this
> it should wrap it in a try catch block - checking for the
> SecurityException. If you catch this then it should probably
> be set to 'this.getClass().getClassLoader()'.
>
> Then a small amount of tweaking is likely to be needed to
> 'fix' the fact that this is null. There are four lines that use
> it the only one that will need changing is:
>
> 204: return rhinoClassLoader.getAccessControlContext();
>
> This should just return null I think in the case that we couldn't
> create the rhinoClassLoader. If you get this working I would
> really appreciate a patch that is known to work for Applets (I've
> considered make these changes myself but w/o setting up the whole
> Applet mess to test it didn't seem like a good idea).
>
> >
> > > William Billingsley wrote:
> > > > I'm using Batik in a couple of applets I'm developing (
> > > > http://www.cl.cam.ac.uk/~whb21/svgDraw/svgCircuit.html is one
> > example; the
> > > > applet is near the foot of the page)
> > > >
> > > > At startup an AccessControlException occurs when Batik tries to
> > create a
> > > > Rhino Interpreter from the InterpreterPool (exception trace at foot
of
> > > > email). js.jar is included in the archive attribute for the applet
> > on the
> > > > page, and is available in the same directory as the applet.
> > > >>From what I can see delving into the code, RhinoClassLoader
> > specifically
> > > > extends URLClassLoader, so I'm not sure if this a "can't find the
> > class on
> > > > the server and not allowed to look elsewhere" (as if I had not
included
> > > > js.jar) or if this exception is coming straight out of the way
Batik is
> > > > written, and will always produce this error if the applet is
unsigned?
> > >
> > > I had what sounds like the same problem using Rhino in an unrelated
> > project.
> > >
> > > The problem is that Rhino tries to 'compile' some of the functions
from
> > > javascript into java as an optimization, and load it via a custom
> > > ClassLoader. There is supposed to be a resource setting somewhere
that
> > > controls the optimization behavior, but I couldn't make it work. My
> > > solution? Remove all the classes in org.mozilla.javascript.optimizer
> > > packages from js.jar.
> > >
> > > Hope this helps,
> >
> > > - josh
> > at
> >
org.apache.batik.script.rhino.RhinoInterpreterFactory.createInterpreter(Unkn
own
> > Source)
> > at org.apache.batik.script.InterpreterPool.createInterpreter(Unknown
> > Source)
> > at org.apache.batik.bridge.BridgeContext.getInterpreter(Unknown Source)
> > at
> > org.apache.batik.bridge.BaseScriptingEnvironment.getInterpreter(Unknown
> > Source)
> > at org.apache.batik.bridge.BaseScriptingEnvironment.loadScripts(Unknown
> > Source)
> > at org.apache.batik.bridge.UpdateManager.dispatchSVGLoadEvent(Unknown
> > Source)
> > at org.apache.batik.swing.svg.SVGLoadEventDispatcher.run(Unknown Source)
> >
> > It's not critical but I would like to enable javascript in Batik in an
> > applet (without signing or changing policies). Any ideas?
> >
> > Stan Dickerson
> > [EMAIL PROTECTED]
> > <mailto:[EMAIL PROTECTED]>
>
>
>
>
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