FW: ACTION-606 (was RE: Action 606/607)

Oops, wrong list.

 

________________________________

From: Jo Rabin 
Sent: 06 December 2007 09:26
To: 'Gerlach, Heiko, VF-Group'; member-bpwg@w3.org
Subject: ACTION-606 (was RE: Action 606/607)

 

Heiko

 

Thanks for this. I think the distinction needs to be made. However, in general I think that having the proxy remember one-time URIs is fraught with difficulties, especially if it means ignoring no-cache directives. I think the situation you describe needs to be dealt with at the server, by it setting a no-transform directive in the Cache-Control header.

 

I'm still puzzled by what you envisage the precise mechanism for "reload" to be, but perhaps this is a moot point if we agree that proxies should not cache the original in these circumstances.

 

Jo

 

 

 

 

 

________________________________

From: member-bpwg-request@w3.org [mailto:member-bpwg-request@w3.org] On Behalf Of Gerlach, Heiko, VF-Group
Sent: 06 December 2007 08:08
To: member-bpwg@w3.org
Subject: Action 606/607

 

Hi All, 

        <trackbot-ng> Created ACTION-606 - Detail reload re: section 2.1.5
    original representation availability [on Heiko Gerlach - due
    2007-12-11].

    <trackbot-ng> Created ACTION-607 - Detail what he means by
    \"reload\" request on mailing list [on Heiko Gerlach - due
    2007-12-11]. 

Clarification on "2.1.5 original representation availability" 

First of all we need to separate beteween content which has been adapted e.g. pages (a)  and content which just has been optimized e.g. images (b). 

a) since the CT changed the layout it must be able to add a navigation element to the page e.g. header or footer, where the user can click a link to access the original layout/untranscoded page.

b) for images, which may be optimized, there is no option to add any navigation element to the content. So how can an image be accessed in the original size/resolution without adding navigation elements when this image is displayed outside of a page context? Today this is done via "reload" option of the browser. As soon as the user reloads the image the CT returns the original image.

General Issue: One Time Urls: 

A One Time Url is a url which works only once. A user who buys e.g. a wall paper will receive a url to request the image after payment. This url can only be used once. So when the CT is accessing the image and is reducing the quality/size/resolution, than it must cache the original image since as soon as the user requests the original image there is no option to access the url a 2nd time since it alread has been expired. For our current concept this only might become an issue when the image server is not supporting the <no-transcode> header.

Cheers 

 

Heiko Gerlach 
Vendor Manager  

Global Consumer Internet Services & Platforms

  
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