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Re: State, when to use GET, and accountability

From: Mark Baker <distobj@acm.org>
Date: Thu, 1 Mar 2007 16:47:49 -0500
Message-ID: <c70bc85d0703011347y41ca1f4ep8618e2c157b631e7@mail.gmail.com>
To: "noah_mendelsohn@us.ibm.com" <noah_mendelsohn@us.ibm.com>
Cc: "David Orchard" <dorchard@bea.com>, www-tag@w3.org

On 3/1/07, noah_mendelsohn@us.ibm.com <noah_mendelsohn@us.ibm.com> wrote:
> Dave:  I know you're collecting ideas for the finding on State in Web
> application design.  One aspect of this that I understand is coming up
> increasingly is the legal need in many contexts for certain enterprises to
> reliably record every access that is made to certain data.  In such cases,
> an obligation of a sort is implicit in every access, and presuming HTTP
> GET in particular is inappropriate.  I think this is a real world issue
> for many users of Web technology.  I'm thinking it might be the basis of
> an interesting use case, though I'm somewhat on the fence as to whether it
> fits better in the whenToUseGET space.  The fact that there are side
> effects of the access seems to be whenToUseGet,

I don't think that's an issue.  As Jacek said, safety is about
incurring obligations, so it's not harmful that an implementation of
GET causes side effects, it's just harmful if the message sender is
blamed for those side effects.

> but I imagine that in many
> cases it will be important to record not just that an access has occurred,
> but also information about the higher level interaction (session?) in
> which the access occurs.  That might bring a tie in to the state finding.

That's an excellent point.  If an interaction is stateful, then the
meaning of the message is partly a function of information not in the
message.  So logging facilities should be logging not just the
message, but any referenced state.

Mark Baker.  Ottawa, Ontario, CANADA.         http://www.markbaker.ca
Coactus; Web-inspired integration strategies  http://www.coactus.com
Received on Thursday, 1 March 2007 21:47:56 UTC

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