is there a quick cheat sheet of the breaking changes somewhere?

On Monday, June 10, 2013 10:40:10 AM UTC-4, Roman Perepelitsa wrote:
>
> On Mon, Jun 10, 2013 at 4:29 PM, Singpolyma 
> <[email protected]<javascript:>
> > wrote:
>
>> On Jun 10, 7:02 am, Roman <[email protected]> wrote:
>> > The hub-initiated automatic subscription renewals are no longer 
>> supported
>> > by the Google Hub. It's a breaking change in the 0.4 specification.
>>
>> The 0.4 spec is not linked to from the official google code page.
>> Where is the spec hosted?
>>
>
> It's at 
> https://superfeedr-misc.s3.amazonaws.com/pubsubhubbub-core-0.4.html. 
> It'll become "official" later this month.
>
> On further thought: what was the reasoning behind this change?  I've
>> gone back and read some discussions of the changes in this group, and
>> haven't seen anything about this one specifically.
>>
>
> The hub-initiated automatic refresh was prone to accumulating garbage 
> subscriptions on the hubs. It was also giving the subscribers the false 
> sense of robustness. What if the hub is unable to reach you when it tries 
> to refresh your subscription? Will you be OK with that subscription being 
> lost? In practice, the subscribers are usually not OK with that and want to 
> be in control of their subscriptions. Also pretty much any subscriber needs 
> to store all subscriptions in a persistent storage anyway, so it's not too 
> hard to periodically issue resubscription requests for subscriptions that 
> need to be extended.
>
> Is there a good "upgrading your subscriber from 0.3" post somewhere to
>> tell me what I need to add support for?
>>
>
> Not yet. Although there are several breaking changes in 0.4 (e.g., the 
> absence of 'sync' subscription requests), Google Hub is mostly backwards 
> compatible. The only thing that has actually changed in a 
> potentially-user-breaking-way is the one you noticed -- the hub no longer 
> initiates resubscription requests on its own.
>  
>
>>
>> Thanks!
>>
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