Continuations Based Web Framework - Seaside.
steve at holdenweb.com
Sun Jan 2 10:03:10 EST 2005
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".
>> Very sexy it looks too. And it seems to be generating a lot of
>> interest - Ruby and Java variants have already sprung up:
> 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
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 :-)
Steve Holden http://www.holdenweb.com/
Python Web Programming http://pydish.holdenweb.com/
Holden Web LLC +1 703 861 4237 +1 800 494 3119
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