One option is to exit(128) in a middleware or something. However, you're in
a much bigger pickle than you think. If the user can run arbitrary code,
what's stopping them from eval("FileUtils.rm_rm('/')")
-- Yehuda

On Wed, Jan 28, 2009 at 11:29 AM, Rich Morin <[email protected]> wrote:

>
> As I understand it, Merb has a master process which spawns off
> some number of worker processes, respawning whenever a worker
> dies.  I'm assuming that the master loads in (or at least could
> load in :-) all of the code that a worker will need, then does
> a fork.  So, this should be a fast operation.  (Please let me
> know if I'm mistaken on this!)
>
>
> I'd like to use this respawning behavior to ensure that no
> request can affect the behavior of a following request (eg, by
> defining a method).
>
> Specifically, I'd like to have the worker process exit as soon
> as the response has been sent to the client.  This should cause
> the master process to spawn a (fresh) replacement worker.  Is
> there an API-friendly way to make this happen?  If not, could I
> have a pointer to the relevant code?
>
> -r
>
>
> P.S.  This is an odd request, so I'll explain a little.  In my
> app, untrusted code is being evaluated via Erubis.  I've been
> able to confirm that code running in one request can define a
> method that a following request can use.  I want to prevent
> this behavior; making the worker exit seems like a plausible
> way to do so...
> --
> http://www.cfcl.com/rdm            Rich Morin
> http://www.cfcl.com/rdm/resume     [email protected]
> http://www.cfcl.com/rdm/weblog     +1 650-873-7841
>
> Technical editing and writing, programming, and web development
>
> >
>


-- 
Yehuda Katz
Developer | Engine Yard
(ph) 718.877.1325

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