W3C home > Mailing lists > Public > public-webapi@w3.org > May 2008

Re: XHR LC comments

From: Maciej Stachowiak <mjs@apple.com>
Date: Sat, 17 May 2008 02:04:17 -0700
Cc: Sunava Dutta <sunavad@windows.microsoft.com>, Anne van Kesteren <annevk@opera.com>, "Web API WG (public)" <public-webapi@w3.org>
Message-Id: <161E54BF-7B24-490B-97E3-C90FB1B30110@apple.com>
To: Julian Reschke <julian.reschke@gmx.de>


On May 17, 2008, at 1:03 AM, Julian Reschke wrote:

>
> Sunava Dutta wrote:
>> ...
>>> At this point, I'm not sure why we're bothering with XHR1 at all.  
>>> It is
>>> *not* what the current implementations do anyway.
>> [Sunava Dutta] I'm sorry, this statement is concerning and I'd like  
>> to understand it better. We havenít had a chance to run the latest  
>> test suite yet but expect the test suite to be compliant with at  
>> least two existing implementations. Do you mean the XHR 1 draft is  
>> not interoperable with existing implementations?
>> ...
>
> Absolutely. Everytime I check something that is of interest to me it  
> turns out that there is no interop, and that only some or even none  
> of the browsers works as specified.

We decided long ago (and subsequently reaffirmed) that instead of  
leaving the spec so vague that all existing implementations are  
automatically compliant, we would define a shared interoperable  
behavior so that implementations can converge. It should not be news  
to anyone that implementations are not automatically 100% compliant.

> Examples:
>
> - Support for HTTP extension methods: IE violates the SHOULD level  
> requirement to support extenstion methods. Opera silently (!!!)  
> changes extension method names to "POST".
>
> - setRequestHeader: none of the browsers throws an exception when  
> setting the header to null. Some do something useful (removing the  
> header), some treat it like an empty string, some seem to set the  
> valoue to the string "null".
>
> I'm also concerned that the spec proposes behaviour that leads to  
> silent data loss, although it's totally unclear why this is needed  
> for interoperability (such as when a DOM to be serialized has no XML  
> representation).
>
> It seems that what's needed here is more work on the test suite. LC  
> is way too early.

By W3C Process, the test suite is supposed to be developed during the  
CR period. So by having one at all before LC, we are ahead of schedule.

Regards,
Maciej
Received on Saturday, 17 May 2008 09:04:58 GMT

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