[whatwg] AppCache Error events

David Barrett-Kahn dbk at google.com
Thu Nov 29 11:40:10 PST 2012

So are there no objections to this, should I draft a change to the spec?


On Mon, Nov 26, 2012 at 12:00 PM, David Barrett-Kahn <dbk at google.com> wrote:

> Right now this event contains no structured information, just an error
> message.  It'd be helpful to us to know more about what failed, so we can
> know what to report to the server and take action on.  It's hard to
> distinguish cache update failures due to just being offline from those
> which are actually causing trouble.  In the second case it's also hard to
> work out which resource is proving unavailable and why.
> One way to do this would be to create an AppCacheError subclass, with an
> errorCode parameter, and also nullable url and httpResponseCode properties.
>  Potential error codes:
> * couldn't fetch manifest (includes url and httpResponseCode)
> * pre and post update manifest fetches mismatched (includes url)
> * fetching a resource failed (includes url and httpResponseCode)
> Related bug:
> https://code.google.com/p/chromium/issues/detail?id=161753
> Thoughts?
> -Dave


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