Re: Free web front end to Mathematica


* Let the user do anything, and risk security issues.

* Make the system safe and have it very limited.

I had email contact with someone who was at one point developing a PDA interface for Mathematica and he had the exact same issues. I'm sure the same will happen with any program that has access to the shell and can read/write files.

You most probably need to make modifications to the kernel
for security. That's what we did for the web interface
of giac/xcas. There is a secure_run variable that is true
in a non-trusted environment and every file system call
is disabled if it is true. The web module calls a C back-end
that can set this variable to true (or false only at the right
moment).
You can try the giac/xcas web interface at
http://www-fourier.ujf-grenoble.fr/~branchar/cgi-bin/giac_online/giac.pl
(default language is french, you can select english at the top
right)
.

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