Ian Hickson wrote:
...
Problem: Some HTTP-based protocols, like AtomPub, require the use of a
large number of distinct URIs. For example, adding a tag or category to a
series of posts on a blog using AtomPub requires one non-GET request per
blog post. While this is prohibitively expensive anyway when done from a
high-latency network like GSM or EDGE, it is still somewhat painful to
require two round trips per non-GET request in cases like this even on
low-latency high-bandwidth connections, and therefore deserves further
consideration.
Proposed Solution: The proposed solution allows one new optional header
for OPTIONS responses. The header contains a path.
...
This proposal effectively addresses the performance & server side
scalability concerns I had with the cross-domain access control mechanism.
Thanks,
John Panzer
Tech Lead/Manager, Google (Blogger, OpenSocial, & Friends)