Hi John,
Thanks for the information. FYI, to use most things
I do not need to sign the applet, because I have
added the line,
user_pref("signed.applets.codebase_principal_support", true);
to my netscape preferences file. (See
http://developer.netscape.com/docs/manuals/signedobj/capabilities/index.html.)
This allows me to enable application privileges. It seems that
NetCDF requires more than just the UniversalFileAccess
privilege, so I was hoping you might know.
Are the NetCDF mailing lists archived?
Thanks again.....John
On Tue, 18 Jul 2000, John Caron wrote:
>
> > >To: support@xxxxxxxxxxxxxxxx
> > >From: "John R. Cary" <cary@xxxxxxxxxx>
> > >Subject: NetCDF Java Applet Capable?
> > >Organization:
> > >Keywords: 200007181820.e6IIKsT11192
> >
> > I have been trying to use the NetCDF package within an applet through
> > Netscape .4.7 on Windows. I have enable UniversalFileAccess, but
> > the code still dies. My code sample is:
> >
> > try { // This must be in the same block?
> > netscape.security.PrivilegeManager.enablePrivilege(
> > "UniversalFileAccess");
> > appendLine("Netscape privileges obtained.");
> > }
> > catch (NoClassDefFoundError ex){appendLine("NoClassDefFoundError");}
> > catch (Exception ex){appendLine("Exception");}
> > appendLine("Will save to file " + fileName + " in directory " +
> > sliceDir + ".");
> > File netCdfFile = new File(sliceDir, fileName);
> > appendLine("File '" + fileName + "' created.");
> > nc = new NetcdfFile(netCdfFile,
> > true, // clobber an existing file
> > true, // prefill variable values
> > schema // metadata template
> > );
> > appendLine("NetCDF file '" + fileName + "' created.");
> >
> > The code dies upon the call to NetcdfFile. The error says only
> > "AppletSecurityException".
> >
> > Is Java NetCDF applet capable within Netscape?
> >
> > Thanks.....John Cary
> >
> > --
> > cary@xxxxxxxxxx John R. Cary www.techxhome.com
> > Tech-X Corporation ph. (303) 448-0728
> > 5541 Central Avenue, Suite 135 fax (303) 448-7756
> > Boulder, CO 80301 cell (303) 356-5399
>
> Hi John:
>
> Im not an expert on this, but I have been investigated applets recently.
> One thing Im pretty sure of is that you have to sign your applets before
> they can escape from the applet security sandbox.
>
> check out:
>
> http://java.sun.com/sfaq/
> http://java.sun.com/security/signExample12/
> http://java.sun.com/security/index.html
>
> We are currently exploring a new technology called WebStart that looks
> promising:
>
> http://java.sun.com/products/javawebstart/
>
--
cary@xxxxxxxxxx John R. Cary www.techxhome.com
Tech-X Corporation ph. (303) 448-0728
5541 Central Avenue, Suite 135 fax (303) 448-7756
Boulder, CO 80301 cell (303) 356-5399
