[Haskell-cafe] Haskell and html input elements

PR Stanley prstanley at ntlworld.com
Thu Nov 15 07:27:13 EST 2007

What i have in mind is an interactive Haskell app which allows the 
user to enter text, push buttons, select radio buttons and so on. As 
I have already done a lot of xhtml coding I thought it might be 
easier to operate the program entirely via a web browser. However, 
I'm also interested in the idea of a straightahead MS Windows GUI for 
my program but dont' really know where to start.
Any advice would be most appreciated.

At 17:13 12/11/2007, you wrote:

>On Nov 12, 2007, at 8:38 AM, PR Stanley wrote:
>>back again!
>>How easy/hard is it to control a haskell program through a web
>It depends on exactly how you want to control it, but at least some
>control is fairly easy.
>If you simply want to start a batch Haskell program, and see its
>output as HTML in a browser, you can use the cgi [1] or fastcgi [2]
>libraries listed on Hackage.
>If you want slightly more interactivity, it would make sense to write
>your Haskell program as its own web server (which is actually
>surprisingly easy) and have it respond to sequences of requests,
>perhaphs storing intermediate state along the way. Giving something
>like this a nice GUI on the user side will probably involve writing a
>certain amount of JavaScript. One example of a program that works
>this way is HERA [3], which is unfortunately not open-source at the
>moment, but may be some day. Another potentially useful library is
>HAppS [4], which abstracts out some of the functionality necessary
>for web-based applications.
>Is this sort of thing along the right track, or were you thinking of
>something else?
>[1] http://hackage.haskell.org/cgi-bin/hackage-scripts/package/ cgi-3001.1.5.1
>[2] http://hackage.haskell.org/cgi-bin/hackage-scripts/package/ 
>[3] http://haskell.org/haskellwiki/ Haskell_Equational_Reasoning_Assistant
>[4] http://hackage.haskell.org/cgi-bin/hackage-scripts/package/ HAppS-0.8.4

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