Hi,
Of course, PDF files can easily contain viruses, since anything can
be embedded in them. Just saying ...
The change to suppress display of a warning about a file potentially
containing viruses (for the specific case of a link to a PDF in a
composite page) is done for consistency with LON-CAPA's handling of
PDF files in other contexts (where no warning is displayed either).
For example, when a PDF file is uploaded or imported into a folder in
a course, the URL of the PDF is modified by prepending /adm/wrapper,
which causes lonwrapper.pm to be called when a user wishes to display
the resource, and the PDF's URL in then the src attribute for an
iframe tag within the web page.
How the user's browser handles display of the iframe's contents is
determined by browser settings for the PDF content type -- one
possibility is to prompt the user to save the file locally; another is
to preview within the browser.
That said, my preference would actually be to implement scanning of
all file uploads for viruses, e.g., using ClamAV, at the time a file
is uploaded to LON-CAPA (similar to Moodle 2.3 and later).
I have created an enhancement request -- see:
http://bugs.loncapa.org/show_bug.cgi?id=6702
Stuart Raeburn
LON-CAPA Academic Consortium
Quoting Gerd Kortemeyer <ko...@lite.msu.edu>:
Hi,
On Mar 8, 2014, at 3:41 PM, Mills, Douglas G <dmi...@illinois.edu> wrote:
Beautiful! Thank you!
Of course, PDF files can easily contain viruses, since anything can
be embedded in them. Just saying ...
- Gerd.
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