On Apr 7, 2010, at 3:01 PM, Marcos Caceres wrote:
Are there any
vendors considering dropping support for CORS in favor of just
supporting
UMP?
This question is quite relevant and I think deserves an answer. It
gives the WG a real idea about concensus if there is buy-in to
implement; though for comercial reasons some may not want to make
support public.
FWIW, I'm quite keen to review the draft (as I personally quite liked
the earlier draft and was even about to start reviewing this morning)
but am reluctant to do so because I'm not getting a sense of
significant support.
Here's what I can tell you about Apple's current thinking:
- We are currently shipping support CORS via XMLHttpRequest in Safari
and WebKit.
- We do not plan to drop support for CORS.
- We do not plan to implement UMP directly from the UMP spec.
- If CORS gains a no-credentials subset, and XHR2 gained an API to use
that subset, we would likely implement that (no firm promises or
timelines though).
- If the CORS no-credentials subset ended up not matching UMP in some
detail, then our implementation would follow CORS, not UMP.
The reason for this is that the style of the CORS spec will help us
understand where the if statements should go in our implementation. We
do not want to implement UMP as a completely separate code path; we'd
like it to be a mode of the code that already handles CORS.
Thus, while we may end up implementing UMP by coincidence, our plans
will likely not be directly affected by the UMP spec, whether or not
it proceeds to Last Call, or the existence of a UMP test suite. (I'm
actually not sure how it is even possible to make a UMP test suite
without having a client API that does UMP processing.)
I cannot speak for the whole WebKit community, since I haven't
gathered broad input, but it is likely that the broader WebKit
community would lean in a similar direction. For example, patches to
add a UMP-specific DOM API, or to add UMP client code wholly separate
from CORS client code, would likely be rejected.
Also, none of this is set in stone. We reserve the right to change our
plans in the future.
Regards,
Maciej
