Re: [Push API] Web push subscription age affects delivery rates

Thanks Marcos for the reply. I have posted the issue:
https://github.com/w3c/push-api/issues/302

On Mon, Oct 1, 2018 at 8:43 AM Marcos Caceres <marcos@marcosc.com> wrote:

> Hi Marco,
>
> > On Sep 27, 2018, at 1:17 AM, Marco Colli <collimarco91@gmail.com> wrote:
> >
> > Hello!
> >
> > I think that this study that I have published needs your attention:
> >
> https://blog.pushpad.xyz/2018/09/web-push-subscription-age-affects-delivery-rates/
> >
> > Your opinion would be greatly appreciated.
> > Also, are you aware of any strategies that are being implemented in
> browsers or push services (e.g. FCM, Autopush) in order to mark inactive
> subscriptions as expired?
>
> (Not an expert on this at all… but your study does raise interesting
> questions)
>
> Notable things:
>
> "It is important that all browsers properly notify their push service when
> a subscription is deactivated / refreshed, otherwise the old subscription
> cannot be marked as expired in a promptly manner. The standard says “MUST”,
> so it is correct. However we still have doubts about possible buggy
> behaviors in the implementations, for example in case of poor internet
> connectivity.”
>
> We should check if we have web platform tests for this.
>
> “There is a feature described by the Push API that would solve this
> scenario, ensuring the eventual removal of old subscriptions: indeed a push
> subscription can have an expirationTime associated to it. However that
> attribute is optional and no current browser uses that: Chrome and Opera
> set it to null, while Firefox doesn’t support it.”
>
> We should enquire why this is not getting supported. It might be worth
> filing a bug:
> https://github.com/w3c/push-api
>
> “It would also be useful if all browsers could set an expirationTime on
> all generated subscriptions.”
>
> Could be good. Folks more involved could probably propose a reasonable
> default… like 1 year.
>
> As above, could you please file a bug:
> https://github.com/w3c/push-api
>
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