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Re: Static? Dynamic?

From: Dan Connolly <connolly@w3.org>
Date: Tue, 29 Jun 1999 22:56:33 -0500
Message-ID: <37799571.BA21761A@w3.org>
To: Scott Orshan <sdo@lchome1.beasys.com>
CC: www-talk@w3.org
Scott Orshan wrote:
> Beyond Forms, though, the display of a Web page is not necessarily
> idempotent

[I hope/assume/infer you're using the term "idempotent" as it was used
circa 1992-1994; the modern terminology is evidently "safe".
http://www.w3.org/Protocols/HTTP/1.1/draft-ietf-http-v11-spec-rev-06.txt.gz
]

> - it is not the same thing to retrieve it once as it is to
> retrieve it many times. There are simple statistics and counters that would
> become incorrect.

no crime there; such is life.

> Ads would be regenerated.

that's a tricky one... one that motivated the hit-counting
specs, I believe...

> You might repeat the
> shopping transaction that you just made.

Whoa! Stop right there! A site that uses GET to signal
execution of a transaction is just broken and antisocial.
I breaks search engines, web accelerators, and web
architecture and web social conventions altogether.

See http://www.w3.org/Provider/Style/get

> The act of retrieving
> a Web page might cause some physical action to happen - zooming
> a camera or shifting a production line forward - not something you
> would want to repeat accidentally.

Then don't use GET. Period.

> I don't know if I've gotten all the nuances right, but I'm sure
> you get the general idea.

I think you've missed an important point.

-- 
Dan Connolly, W3C
http://www.w3.org/People/Connolly/
tel:+1-512-310-2971 (office, mobile)
mailto:connolly.pager@w3.org (put your tel# in the Subject:)
Received on Tuesday, 29 June 1999 23:56:34 GMT

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