[whatwg] Something better than DOM_QUOTA_ERROR when LocalStorage is immutable?

[Anne van Kesteren]

On Wed, 03 Jun 2009 23:15:31 +0200, Jeremy Orlow <jorlow at chromium.org> wrote:
> *Please, keep this on topic.  There's no point to rehashing
> http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2009-April/019238.htmlor
> any of the other similar debates on private browsing and
> localStorage's
> persistence guarantees.*
>
> When in "private browsing" mode, WebKit should not write any data to the
> hard drive.  In addition, WebKit
> does not allow changes to localStorage that aren't going to be written to
> disk.  Currently, it returns a DOM_QUOTA_ERROR on setItem when private
> browsing is enabled, and silently fails for removeItem and clear.  The
> silent failures are obviously bad, but even the (ab)use of  
> DOM_QUOTA_ERROR
> kind of bothers me.
>
> Is there an exciting exception that'd work better to tell the script "the
> change failed because localStorage is currently immutable"?  If not, is
> there any chance it could be added to the spec?
>
> Obviously only browser vendors that share WebKit's philosophy on
> localStorage's "guarantee" of persistence would actually use this, but I
> think it'd be far better than the current behavior.

Doesn't this reveal what mode the user is using to view the site? That seems kind of bad.


-- 
Anne van Kesteren
http://annevankesteren.nl/