[Zope-dev] Caching

[Damian Morton]

I have such a spider in the works for ASP. It traverses the site looking for special header tags which specify cacheing information such as 'refresh once a day at 01:00', and rendering tagged files the files to HTML. The problem has become one of how to alter links to .asp pages into links to .html pages at run-time, so that the caching is transparent. Unfortunately I havent figured out a way to get at the innards of the server to do implement this mapping selectively. 

This isnt exactly the kind of cached/demand/lazy reverse dataflow evaluation that would be ideal for this situation.

----- Original Message ----- 
From: Josh Zeidner <jmz_phylogenic@hotmail.com>
To: <morton@dennisinter.com>
Cc: <Zope-Dev@zope.org>
Sent: Tuesday, September 14, 1999 9:12 AM
Subject: Re: [Zope-dev] Caching


> Hi Damien,
> 
>   I solved this problem for a web-site( S&S ) based in Cold-Fusion by 
> simulating browser requests and copying the contents retrieved into a cache 
> directory structure.  The caching took place on a time-bases rather than 
> some function of hits or timestamp.  I do not know, however, if this caching 
> mechanism could be developed( to work efficiently ) as part of Zope as any 
> object in Zope is dynamically created.  I good idea may be to write a simple 
> web-spider that tracks the contents of the site and automatically caches all 
> the pages on a regular basis...
> 
>   -josh z
> 
> 
> 
> >From: morton@dennisinter.com (Damian Morton)
> >To: "Christopher Petrilli" <petrilli@digicool.com>,        "Paul Mokbel" 
> ><pm@webhosting.com>, <Zope-Dev@zope.org>
> >Subject: Re: [Zope-dev] Caching
> >Date: Sun, 12 Sep 1999 22:13:36 -0400
> >
> >This is an interesting problem; a significant proportion of a dynamic 
> >website is not driven by the user requesting a page, but is rather driven 
> >by certain triggering conditions.
> >
> >In an ideal world, you be able to write your website as a dynamic website, 
> >and some kind of magic would determine what the conditions triggring the 
> >rendering of a page were and then set up some kind of notification 
> >mechanism to cause the re-rendering of the page as the conditions are 
> >triggered.
> >
> >For example, a news page only needs to be re-rendered when the news on the 
> >page changes.
> >
> >Being able to identify which parts of a page need to be re-rendered is even 
> >more fine-grained.
> >
> >To do this, youd have to timestamp virtually every single object, from 
> >variables on up, with a last-modified date. This could be tricky.
> >
> >----- Original Message -----
> >From: Christopher Petrilli <petrilli@digicool.com>
> >To: Paul Mokbel <pm@webhosting.com>; <Zope-Dev@zope.org>
> >Sent: Sunday, September 12, 1999 9:54 PM
> >Subject: Re: [Zope-dev] Caching
> >
> >
> > > > In ROXEN (RXML); There is a tag line where by you can cache certain 
> >content
> > > > within the <CACHE> brackets.  Is there something similar within Zope?
> > >
> > > What has been thought of is doing more "rendered caching" (i.e. cache
> > > rendered results, thereby short-circuiting the DTML process).  This 
> >could be
> > > very advantageous, but gets into a lot of issues of management of the 
> >cache
> > > which is non-trivial (Vignette, one of our competitors that does
> > > "consultant-ware" has several patents on it), so... patches accepted. 
> >Note
> > > that performance will be one of our "watch words" in the coming months.
> > >
> > > Chris
> > > --
> > > | Christopher Petrilli        Python Powered        Digital Creations, 
> >Inc.
> > > | petrilli@digicool.com                             
> >http://www.digicool.com
> > >
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