[html5] Offline apps

Oliver Schmidt oliver.schmidt.wue at arcor.de
Sat Apr 9 13:38:14 PDT 2011

Hi Ilkka,

a  few  months  ago,  I've  been experimenting with the offline cache.
I  think  there  is  one easy way to achieve what you want to: If your
content  got  updated,  you should update the cache manifest (version)
which  in  turn forces browsers to update their caches. Please correct
me if I'm wrong...


Diese Nachricht bezieht sich auf Ihr Schreiben vom Samstag, 9. April 2011
> Hi,

> I'm trying to figure out a way to make my app work offline. The app is
> relatively simple. There isn't even any javascript, only a few pages
> of html, and the main page, which contains the list of pages. You can
> think of it as a catalog of pages.

> I am now experimenting with cache manifest, and I would really like to
> to implement it in a way that the "offline cache" kicks in only when
> the user is actually offline. Now the problem I'm having is that the
> offline cache (the name of which is confusing), seems to interfere
> when the user is actually online. The result is, that page (the
> homepage of the application) comes from cache, and not from the
> server, and the user doesn't see the data he should be seeing, but
> sees the old cached version.

> So, what I would like to achieve is this: I would like the offline
> cache to be used only when the user is offline. Does this sound
> reasonable? It may be that it's not always clear if the user is
> offline or online, but now the problem is pretty hard as the cache
> interferes "too much".

> Also, in my opinion, caching in the web world is quite complex from
> the start ... Now it seem that cache manifest adds more to this
> complexity. I hope I'm missing the point (I'm new on this, I very well
> might be) and cache manifest can be used so that it starts making
> sense to me :) But now I don't quite understand how to use it right.

> Did this bring any thoughts to anyone?

> Thanks,
> Ilkka
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