On Jan 7, 2007, at 19:10 , Bjorn Bringert wrote:
On Jan 7, 2007, at 19:03 , Ian Lynagh wrote:
On Fri, Jan 05, 2007 at 06:14:31PM +0100, Bjorn Bringert wrote:
On Jan 5, 2007, at 18:04 , Ross Paterson wrote:
instance (MonadTrans t, MonadCGI m, Monad (t m)) => MonadCGI (t m)
I added that instance reluctantly, but it is quite useful when you
write your own monad transformers and want to wrap CGIT. Removing it
would break some existing code (Hope is the only one I know of),
Some of my code needs it too (I think I might have requested it be
added
in the first place?). I find it very useful to be able to write
code in
the style shown in
http://www.haskell.org/pipermail/haskell-cafe/2007-January/
021085.html
Hugs compatibility is also important, though, and undecidable
instances
are marked "probably no" for Haskell'.
It feels like a bit of a sledgehammer, but maybe the instance
should be
put in its own package cgi-undecidable or something?
Yes, you were the one who requested it in the first place. It was
initially in a separate module. As far as I recall, I only moved it
to Network.CGI.Monad to avoid it being an orphan instance. This
isn't really important I guess. I would be ok with moving it
somewhere else. A separate package would probably be the cleanest,
since it would allow applications to declare that they need it.
Done. Thanks for the suggestion Ian! The undecidable instance is now
in a separate package, available from here:
http://darcs.haskell.org/packages/cgi-undecidable/
The cgi package still does not work under Hugs due to the missing
getEnvironment. I think that it really needs to use getEnvironment,
and not getEnv as the old Network.CGI did. I would like all
environment variables to be available, not just the standard ones.
The is needed for request-specific variables like HTTP_* and for
server-specific ones like REQUEST_URI (set by mod_rewrite). It's not
ok to force the user to call getEnv for those either, since the
program might be running under FastCGI where the variables do not
come from the program environment variables.
/Björn_______________________________________________
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