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Re: [widgets] Comments on Section 5 of the 18-Aug-2009 LCWD of A&E spec

From: Marcos Caceres <marcosc@opera.com>
Date: Mon, 14 Sep 2009 17:03:41 +0200
Message-ID: <b21a10670909140803p2464f1cbo410d24b7f4287b78@mail.gmail.com>
To: Arthur Barstow <Art.Barstow@nokia.com>
Cc: public-webapps <public-webapps@w3.org>
On Mon, Sep 14, 2009 at 2:01 PM, Arthur Barstow <Art.Barstow@nokia.com> wrote:
> On Sep 13, 2009, at 3:23 PM, ext Marcos Caceres wrote:
>
>> On Wed, Sep 9, 2009 at 10:07 PM, Arthur Barstow <art.barstow@nokia.com>
>> wrote:
>>>
>>> 3. The following statement doesn't seem necessary given preferences is of
>>> type Storage; as such, I think it should be removed:
>>>
>>> [[
>>> A user agent must have the ability to directly read and write to the
>>> storage
>>> area (i.e., without needing to make use of the [WebStorage]
>>> specification's
>>> Storage interface) and must  have the ability to delete a storage area.
>>> ]]
>>
>> I don't agree. The above gives a storage area the ability to be
>> populated with config.xml <preference> data without the UA using the
>> Storage interface. This is important, as events must not be fired
>> during pre-population.
>>
>> However, it might be that the above assertion needs to be rewritten to
>> directly address the <preference> use case (hence making the assertion
>> more testable). WDYT?
>
> Section 6. should prescribe everything that needs to be said thus I don't
> think the text I quoted is necessary. If Section 6 doesn't sufficiently
> address the mapping to <preference>, then yes, it should be updated.

I agree, it now reads:
"To facilitate the storage of preferences during the initialization of
the preferences attribute, a user agent must have the ability to
directly read and write to a storage area without invoking the methods
of the [WebStorage] specification's Storage interface."

>>> 6. The following assertion is another implementation detail that should
>>> be
>>> removed or made non-normative:
>>>
>>> [[
>>> A user agent should impose their own implementation-specific limits on
>>> the
>>> length of otherwise unconstrained keys and values of a storage area, e.g.
>>> to
>>> prevent denial of service attacks, to guard against running out of
>>> memory,
>>> or to work around platform-specific limitations.
>>> ]]
>>
>> The above is a boilerplate "hot potato" assertion, that puts the onus
>> of securing the implementation on implementers. It's basically there
>> to protect the WG from people asking "what happens if I try to
>> store/do something strange". I don't know if we should remove it.
>
> I don't think the quoted text above provides any protection nor particular
> value [hint: nuke it or make it a Note].

Ok, it's a note now.


-- 
Marcos Caceres
http://datadriven.com.au
Received on Monday, 14 September 2009 15:04:36 GMT

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