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[whatwg] Comment on 6.6 Offline Web Applications

From: Michael Nordman <michaeln@google.com>
Date: Thu, 3 Jun 2010 14:40:47 -0700
Message-ID: <AANLkTinKfi2qUg055-45fl5Oy8NpF4CH2eI-YGdT-KU3@mail.gmail.com>
There is a way for the application to remove itself from the cache. If
fetching the manifestUrl returns a 404 or 410 response, all traces of that
manifestUrl are deleted from the cache. See section 6.6.4.

On Thu, Jun 3, 2010 at 12:30 PM, Peter Beverloo <peter at lvp-media.com> wrote:

> On Thu, Jun 3, 2010 at 15:01, Daniel Glazman
> <daniel.glazman at disruptive-innovations.com> wrote:
> >
> > Hi there,
> >
> > I noticed the Application Cache does not allow to remove
> > a single cached web application from the cache. Is that on
> > purpose?
> > I am under the impression the cache is here more an offline
> > storage for webapps than a normal cache, and that in the long
> > run browsers will have to implement an "Offline Web Apps" manager.
> > Since the user is supposedly already provided with a dialog
> > asking permission to make a webapp available offline, it makes
> > sense to give him/her a way to remove a single application from
> > the cache.
> >
> > </Daniel>
>
> Section 6.6.7 talks about expiration of cached data [1], but also
> includes a few notes about removing items from the store. It
> specifically states that user-agents could have a "delete
> site-specific data" feature which also covers removing application
> caches, but also hints towards a feature that removes caches on
> request of the user.
>
> The API does not state a way allowing an application to remove itself
> from the cache, which could be desirable for web authors. If there's
> interest for such an addition I'm willing to make a proposal, as it
> isn't hard to think about use-cases for such a feature.
>
> Regards,
> Peter Beverloo
>
> [1]
> http://www.whatwg.org/specs/web-apps/current-work/multipage/offline.html#expiring-application-caches
>
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