Re: Fixing appcache: a proposal to get us started

Json manifest seems a nice solution to me :-)

Send from my Samsung Galaxy Note II
El 28/11/2013 07:21, "eli" <elibird@gmail.com> escribió:

> >> The web is server + client sides. Trying to "fix" issues you have with
>> >> client technologies only (appcache, JavaScript, ...) will always be a
>> bad
>> >> choice.
>> >
>> > I disagree, Javascript and web browsers are becoming powerful enough
>> > to delegate servers to their barebones, just offering storage or
>> > databases or specific web services, being able to delegate all the
>> > operatibility to the client-side code. In the new web, web servers are
>> > just plain ol' API
>>
>>
>> It's not that much a question of available power, it's just operations
>> that needs to be done before any file hit the device.
>>
>> To be available offline, the device has to hit a server first, then the
>> appcache "magic" happens.
>> No reason the server couldn't prepare / select what to send to the
>> device: iOS won't support WebM anytime soon, there is no reason to
>> constantly ask iOS device the same info again & again. That just makes no
>> sense, and force devs to produce device/os specific files (manifest) anyway.
>>
>> And it's not AppCache job to do so. Its job is just make a web document
>> available offline + make updates simple & easy.
>>
>> Example : Not being able to update one single file keeping the others
>> cached is a structural mistake. Sub-manifests sounds like an
>> over-engineered fix to me, just making things more complicated for
>> developers, browser vendors & for future evolution of this specification.
>>
> Could the problems of not being able to update one single file in the
> cache, and not sending WebM files to iOS devices, both be solved by adding
> additional file info to the cache manifest?
>
> For example, if the manifest were in JSON:
>
> {'CACHE': [
> {'file':'index.html','timestamp':'2013-11-27 00:00:00','expires':'2013-12-02
> 00:00:00','type':'text/html'},
> {'file':'video.webm','timestamp':'2013-11-27 00:00:00','expires':'2013-12-02
> 00:00:00','type':'video/webm'},
> {'file':'video.mp4','timestamp':'2013-11-27 00:00:00','expires':'2013-12-02
> 00:00:00','type':'video/mp4'}
> ],
> 'NETWORK':'*',
> 'FALLBACK':[['online.jpg','offline.jpg'],['online.htm','offline.htm']],
> 'SETTINGS':'prefer-online'}
>
> This way, a browser can compare a file's timestamp in the newly downloaded
> manifest to the one in its stored manifest to determine whether or not to
> download a new version. And an iOS device could ignore 'video/webm'
> file-types.
>
> -Eli
>
>
>> > --
>> > "Si quieres viajar alrededor del mundo y ser invitado a hablar en un
>> > monton de sitios diferentes, simplemente escribe un sistema operativo
>> > Unix."
>> > – Linus Tordvals, creador del sistema operativo Linux
>>
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