Re: accessing files external to webapp

[Lorrin Nelson]

Hi again -- I'm still stumped by this problem and looking for help. But 
I did (duh) edit my Tomcat startup script to not use the -security 
option, so now at least I know that whatever's giving me headaches has 
nothing to do with the Security Manager.

So to summarize -- what do I need to do to access files outside of my 
webapp besides take care of the security manager and Unix file 
permissions? (I thought that was it!) And should I use a mechanism other 
than getClassLoader().getResource(path) to do so?

Thanks!

-Lorrin

Lorrin Nelson wrote:
Hi - I have what I think is a security permission problem, but I'm not 
sure.

I'm migrating an existing webapp from SuSE/Tomcat 4.0 to Debian/Tomcat 
4.1. The SuSE box didn't have a security manager, the Debian one does.

In one of the business logic classes, I need to determine if a file 
external to the webapp exists or not. The check (in a class named 
PickManager.java) is
    if (PickManager.class.getClassLoader().getResource(path) == null)

Using that technique, I can determine if files exist up to the webapps' 
context path, but no futher. Since it worked fine on the SuSE box, I'm 
assuming it's a permission problem. However, in an act of desperation I 
went so far as to add

  permission java.security.AllPermission;

to my grant block for all webapps in 
/etc/tomcat4/policy.d/04webapps.policy, but still no luck.

The file in question is world-readable, so I don't think its a unix file 
permission problem clouding the picture.

Anyone have an what might be going on? Is there a diff't technique I 
should use to check for a files' existence?

Thanks!

-Lorrin



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