On 06.11.2012, at 12:49, Julian Reschke wrote:
> On 2012-11-06 09:28, Sergey Nikitin wrote:
>>
>> On 05.11.2012, at 16:28, Julian Reschke wrote:
>>
>>>>
>>>> Yes. Exactly.
>>>> It's not about offline apps, it's about reducing loading time.
>>>
>>> There's already the "prefetch" link relation that you could use.
>>>
>>
>> You need at least two pages to start prefetching.
>
> Why two?
>
>> And you can't prefetch anything for the first page.
>
> Yes, you can. Just use the first page's metadata instead of a separate
> prefetch manifest,
>
I mean If you already downloaded a page you don't need any metadata. You can
parse it and extract all urls from script/style tags (Ok. Except for a
dynamically inserted ones).
>> If you have single page application you can't prefetch.
>
> Why?
>
>> And it's not always possible for browser to visit a page (cookie/password
>> protected).
>
> It's always possible to "visit" the page; it just needs to return the
> relevant header fields.
>
Maybe you never visited the page or your cookies are expired (or you logged
out).
And visiting any page (with all cookies/other headers) is irreversible action.
It affects statistics, it could do something without your knowledge (marking
message as read in your webmail?). Yes I know about special header browser
should send to a server, but I've never heard about any site supporting it.
Also generating a whole page just for metadata in it is a waste of server's CPU
time.
--
Sergey Nikitin
