gabriele renzi wrote:
Mike Thompson ha scritto:
'Seaside' is a Smalltalk framework for what might be called "Modal Web Development" or "Synchronous Web Programming", or even "Continuation Based Web Apps".
http://www.beta4.com/seaside2/
Very sexy it looks too. And it seems to be generating a lot of interest - Ruby and Java variants have already sprung up:
http://rubyforge.org/projects/borges/ http://lakeshore.sourceforge.net/
actually, there are also implementations in Scheme, Common Lisp (UnCommonWeb) and Cocoon-FLOW has similar concepts.
And somewhere (I think on the portland pattern repository) I recall reading that Viaweb (aka "the first web app") was written in CPS. Also notice that the Wee project in ruby is more advanced that Borges.
I googled for the python spin-off but didn't find one. Closest I found was Imposter (http://csoki.ki.iif.hu/~vitezg/impostor/) which looks like an earlier, partially failed attempt to do what Seaside now seems to be delivering.
I think "independent" more than earlier, it seem many people are reinventing this from time to time.
Anyway, I just wanted to point out that IIRC something on this lines appeared recently in the nevow svn tree, maybe you can take a look.
I did actually do some sort-of-related work in this area, which I presented at PyCon DC 2004 - you can access the paper at
http://www.python.org/pycon/dc2004/papers/18/Setting_A_Context.pdf
An audience member mentioned the Smalltalk and Scheme-based work on web continuation frameworks, and I was sorry my answer at the time seemed unduly dismissive. There are some interesting similarities, and though my own implementation is decidedly clunky I like to think the paper explains some of the advantages of maintaining state and why the "back" button is an obnoxious anachronism :-)
regards Steve -- Steve Holden http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/ Holden Web LLC +1 703 861 4237 +1 800 494 3119 -- http://mail.python.org/mailman/listinfo/python-list
