FYI - pub/sub protocol from Social Web WG

Given the recent discussion on patterns for abstract messaging for the Web of things, I thought the work on a simple pub/sub protocol in the W3C Social Web Working Group may be of interest, and if nothing else demonstrates that work on higher layer protocols does take place in W3C.

The following is a link to the editor’s draft for the topic based PubSub protocol, which is layered on top of HTTP:

     https://w3c.github.io/pubsub/

The draft specification covers discovery, subscription, notification and un-subscription. Subscribers are required to provide a call back URL. There is an optional lease time parameter, and an optional subscribed provided secret string for computing an HMAC digest for authorised content distribution (HTTPS only). An error message is returned when subscription requests are denied.

—
   Dave Raggett <dsr@w3.org <mailto:dsr@w3.org>>