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Applet not allowed to access class in it's own jar?

 
Justin Rowles
Greenhorn
Posts: 1
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I have an applet which fetches bytesstreamed information from the same server it was fetched from (in this case, localhost on port 8080).

It works perfectly with the applet viewer, so I am certain its a permissions problem, plus the Mozilla java console has this:

java.security.AccessControlException: access denied (java.lang.RuntimePermission accessClassInPackage.sun.net.www.protocol.http)

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.checkPackageAccess(Unknown Source)

at sun.applet.AppletSecurity.checkPackageAccess(Unknown Source)

at sun.applet.AppletClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClassInternal(Unknown Source)

at uk.co.rms.client.store.remote.comms.Comms.communicate(Comms.java:207)
...

I've missed off the rest of the stack trace cos I don't think its relevant and I hate having to scroll paste huge stacks in fora!

Anyway, the line that kicks it all off is this:

conn = (HttpURLConnection) url.openConnection();

and the class that it appears not to be allowed is in package sun.net.www.protocol.http.

The daft thing is that on hitting the problem initially, I added the entire package to the archive ('applet.zip') from which the applet is run, which I would have thought made it perfectly OK.

Can anyone advise why it still doesn't work?

Thanks in advance,
Justin.
 
Murali Kurukunda
Ranch Hand
Posts: 36
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I have seen a same exception stack trace in a different context. Where is the following line called from? I am sure it is inside on eof applets' internal methods, but Is it called from inside applet or is the method that has this line called from JavaScript?
conn = (HttpURLConnection) url.openConnection();

Is your applet signed?
 
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