Simple Update Protocol, or SUP, is a protocol developed by
FriendFeed to simplify and speed up
RSS
RSS ( RDF Site Summary or Really Simple Syndication) is a web feed that allows users and applications to access updates to websites in a standardized, computer-readable format. Subscribing to RSS feeds can allow a user to keep track of many di ...
and
Atom feed updates. Updates from services that supported the protocol would appear on FriendFeed within seconds,
[ Paul Buchheit]
''Simple Update Protocol: Fetch updates from feeds faster''
''FriendFeed Blog'', August 27, 2008. until support was dropped. These sites include
Disqus
Disqus () is an American blog comment hosting service for web sites and online communities that use a networked platform. The company's platform includes various features, such as social integration, social networking, user profiles, spam and ...
,
Identi.ca,
reddit.
Functioning
SUP introduces SUP feeds, which are lists of RSS and Atom feeds that have updated recently. A feed consumer (like FriendFeed, or a
feedreader) can regularly
poll a small number of SUP feeds instead of polling each individual feed.
RSS and Atom feeds are identified in SUP feeds by an opaque, unique identifier derived from their URL. This allows a SUP feed to index private feeds without revealing their URL.
SUP feeds are intended to be managed by services that publish large amounts of RSS and Atom feeds, though FriendFeed also hosted a public SUP feed which anyone could post updates to. The mechanism for posting updates to a public SUP feed is not standardised.
Past Support
*
Brightkite supported SUP
but was itself shutdown in April 2012.
*
YouTube's API v2.0 supported SUP, but that version of the API was deprecated in 2014 and YouTube's SUP feed was eventually shut down. YouTube data API v3 supports
PubSubHubbub
WebSub (formerly PubSubHubbub) is an open protocol for distributed publish–subscribe communication on the Internet. Initially designed to extend the Atom (and RSS) protocols for data feeds, the protocol can be applied to any data type (e.g. HTM ...
instead.
''Subscribe to Push Notifications''
''Youtube - Data API''
References
External links
See also
* PubSubHubbub
WebSub (formerly PubSubHubbub) is an open protocol for distributed publish–subscribe communication on the Internet. Initially designed to extend the Atom (and RSS) protocols for data feeds, the protocol can be applied to any data type (e.g. HTM ...
Network protocols
Internet protocols
Application layer protocols
RSS
Atom (Web standard)
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