[Zope-dev] let's just get rid of it (was: Last-modified and bobobase_modification_time)

[Adrian Hungate]

Just a follow up to Leonardo's comments. It would seem that DTML, zpt, or
script (python or whatever) pages should seem, to the browser, to always be
new. Things like Portal Documents (In CMF) are non-programatic (in fact, I
think most of the standard Portal types are static), and so they ought to be
able to rely on their modification date/time.

If all static objects defined (via a mixin, or just compliance with a new
API, whatever), a method (for example) "LastModified", then the HEAD could
return the correct time/date if this is found, and the current time/date in
all other cases. This would allow authors who want to add this functionality
the option of doing so, but would not cause major lossage if they did not.

Adrian...

--
Adrian Hungate
EMail: adrian@haqa.co.uk
Web: http://www.haqa.co.uk

----- Original Message -----
From: "Leonardo Rochael Almeida" <leo@hiper.com.br>
To: "Zope Developers list" <zope-dev@zope.org>
Sent: Wednesday, June 19, 2002 5:37 PM
Subject: [Zope-dev] let's just get rid of it (was: Last-modified and
bobobase_modification_time)


> IMHO, Last-modified does not make sense for dynamically calculated
> pages, as most zope pages are. We should just not provide this header,
> or provide with the value of the current time.
>
> I think the Last-modified header should only be properly calculated for
> objects whose 'bobobase_modification_time' actually reflects the state
> of the object as seen from someone rendering it directly, such as File
> and Image objects.
>
> A single <dtml-var ZopeTime> in a method is enough to render the
> Last-modified header dangerously inacurate, IMO.
>
> Zope is a dynamic web server. Most of the time, any hit returned by zope
> was dynamically generated just now, and that's what we should be telling
> web clients, with very specific exceptions, such as necessarily static
> content (Files and Images), cached methods (RAM cache manager), or
> methods where we programatically pretend the pages where not dynamically
> calculated (by manually setting headers).
>
> Cheers, leo.
>
> --
> Ideas don't stay in some minds very long because they don't like
> solitary confinement.
>
>
>
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