I'd like to embed pictures (.png) in a CGI-generated output. This doesn't seem to fit directly into ghc's Network.CGI setting. (Not entirely ghc's fault, of course :-)
By the html definition, including a picture seems to require an indirection. But I don't want to expose a static address,
so I am thinking of something like <IMG SRC="Get.cgi?identifier">
But this can't be done with ghc's CGI library (it assumes that text/html is output). So the library should export some more of its functions.
(Yes, I can easily patch this in a copy of the source code
http://cvs.haskell.org/cgi-bin/cvsweb.cgi/~checkout~/fptools/libraries/network/Network/CGI.hs?rev=1.5
Ideally, I am thinking of
class Picture a where picture :: a -> IO [ Byte ]
and I want to call Get.cgi with argument `urlencoded (show a)'. The underlying program should then emit the byte stream (from scratch, or from a cache). But then it would need to do `read (urldecode input)' and this would require to transmit a representation of the type as well.
Any ideas?
BTW, my application would be drawings of finite automata (which can be nicely done by dot/neato), in order to make this a bit more friendly to the eye: http://elearning.htwk-leipzig.de/~autotool/cgi-bin/Face.cgi (test account: matrikel 318, passwort guest, then check problem Determine-D-Quiz) -- -- Johannes Waldmann, Tel/Fax: (0341) 3076 6479 / 6480 -- ------ http://www.imn.htwk-leipzig.de/~waldmann/ ---------
_______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
