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[whatwg] About bypassing caches for URLs listed in Fallback and/or Network section in a HTML5 Offline Web Application

From: Lianghui Chen <liachen@rim.com>
Date: Tue, 13 Jul 2010 11:12:38 -0400
Message-ID: <BB31C4AB95A70042A256109D461991260182913D@XCH117CNC.rim.net>
So if the content for a "fallback namespace" is cached, which should be if it starts with network connection and if server not explicitly use "no-cache/no-store" cache control, then it will always be used, from network or cache, and its mapping "fallback entry" will never be used, even if it's offline?

-----Original Message-----
From: Shwetank Dixit [mailto:shwetankd@opera.com] 
Sent: Tuesday, July 13, 2010 10:43 AM
To: whatwg at lists.whatwg.org; Lianghui Chen
Subject: Re: [whatwg] About bypassing caches for URLs listed in Fallback and/or Network section in a HTML5 Offline Web Application

For 'fallback', it will try to load the resource normally, however, if the  
user is offline, that can't happen...so it will try to do it till a short  
while till it gives up (during that short while, if something is cached as  
part of the normal cache then it will use it), after which it will load  
the fallback resource wherever applicable.



On Tue, 13 Jul 2010 19:56:49 +0530, Lianghui Chen <liachen at rim.com> wrote:

> Thanks, but that means once Opera starts with network connected, it  
> won't detect whether network is offline for offline web applications.  
> Doesn't it somehow defeat the purpose of "fallback" resource?
>
> -----Original Message-----
> From: Shwetank Dixit [mailto:shwetankd at opera.com]
> Sent: Tuesday, July 13, 2010 10:19 AM
> To: Lianghui Chen; whatwg at lists.whatwg.org
> Subject: Re: [whatwg] About bypassing caches for URLs listed in Fallback  
> and/or Network section in a HTML5 Offline Web Application
>
> At least in Opera, it will still respect the browser's normal cache
> header. So the network section header will just bypass the application
> cache, and will load normally like any other web page, which means
> respecting (i.e, not bypassing) the normal cache.
>
> On Tue, 13 Jul 2010 19:28:55 +0530, Lianghui Chen <liachen at rim.com>  
> wrote:
>
>>
>> Anyone has any comments?
>>
>> From: whatwg-bounces at lists.whatwg.org
>> [mailto:whatwg-bounces at lists.whatwg.org] On Behalf Of Lianghui Chen
>> Sent: Monday, July 12, 2010 4:12 PM
>> To: whatwg at lists.whatwg.org
>> Subject: [whatwg] About bypassing caches for URLs listed in Fallback
>> and/or Network section in a HTML5 Offline Web Application
>>
>> Hi,
>>
>> In spec HTML5 for offline web application
>> (http://www.whatwg.org/specs/web-apps/current-work/#offline) chapter
>> 6.6.6, item 3, 4, 5 state that for resources that is in online whitelist
>> (or has wildcard whitelist), or fallback list, it should be fetched
>> "normally".
>>
>> I would like to know does it mean the user agent (browser) should bypass
>> its own caches (besides html5 appcache), like the WebKit cache and
>> browser http stack cache?
>>
>> Best Regards
>> Lyon Chen
>>
>>
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>


-- 
Shwetank Dixit
Web Evangelist,
Site Compatibility / Developer Relations / Consumer Products Group
Member - W3C Mobile Web for Social Development (MW4D) Group
Member - Web Standards Project (WaSP) - International Liaison Group
Opera Software - www.opera.com

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Received on Tuesday, 13 July 2010 08:12:38 UTC

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