Alvaro Sanchez wrote:
> These images are stored on a "content collection" area specific to the 
> instructor, but the images are public to the people enrolled in the class.

Your application is not enrolled in the class, is it?

There's a huge difference between calling an image from a browser
(where somebody is logged in and has the right credentials) and
calling an image from a servlet (even if the servlet is called
from a browser by somebody that is logged in).

Look at the server logs on the server that provides the images.
You'll see that a hit from an IP of a student that is logged in
is processed correctly. You'll see that hits from your app don't
come from the IP address of the student, but from your application
server; this is a totally different user!

Solving this problem is a matter of administration.
br,
Bruno

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