1. Getting stuff in and out
of Buzz
A quick guide
Paul Kinlan
Developer
Programs
Engineer

2. Who am I? @Paul_Kinlan
I help you build cool stuff!

3. What is Buzz?
A platform for sharing. Built supporting open
protocols

4. Technologies
A very brief overview

5. PubSubHubbub
Don't call us. We'll call you!

6. Activity Streams
A way of expressing what people do on the
web

7. MediaRSS
Embed content and meta-data into your
feeds.

8. XFN + Social Graph API
A way to express machine readable
connections between people.

9. WebFinger
For a given public account (email address) WebFinger
returns an XRD.
Contains information about where we can discover
information.
Helps discover the OpenID endpoint.
Web Finger -> Profile -> OpenID
The XRD Document also points to a Buzz Feed
Web Finger -> Buzz Feed

10. Common Questions
How do I discover a user's Buzz feed?
How do I get notified of updates to a users Buzz feed?
How can I get my feeds into Buzz?

11. All about a demo
Create a service that uses discovery and login

12. Quick Flow

13. WebFinger result
An example response for a profile that is publicly listed and
has a public username.
Query: http://www.google.com/s2/webfinger/?q=acct:paul.
kinlan@gmail.com
<?xml version='1.0'?>
<XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0'>
<Subject>acct:paul.kinlan@gmail.com</Subject>
<Alias>http://www.google.com/profiles/paul.kinlan</Alias>
<Link rel='http://portablecontacts.net/spec/1.0' href='http://www-opensocial.googleusercontent.com/api/people/'/>
<Link rel='http://webfinger.net/rel/profile-page' href='http://www.google.com/profiles/paul.kinlan' type='text/html'/>
<Link rel='http://microformats.org/profile/hcard' href='http://www.google.com/profiles/paul.kinlan' type='text/html'/>
<Link rel='http://gmpg.org/xfn/11' href='http://www.google.com/profiles/paul.kinlan' type='text/html'/>
<Link rel='http://specs.openid.net/auth/2.0/provider' href='http://www.google.com/profiles/paul.kinlan'/>
<Link rel='describedby' href='http://www.google.com/profiles/paul.kinlan' type='text/html'/>
<Link rel='http://schemas.google.com/g/2010#updates-from' href='http://buzz.googleapis.
com/feeds/116059998563577101552/public/posted' type='application/atom+xml'/>
</XRD>

14. Notification of Updates
Use Pubsubhubbub. It Rocks.
NO MORE POLLING. The hub pings you when there is an
update.
The hub is defined in the user's feed.
<link rel="hub" href="......">
POST
http://pubsubhubbub.appspot.com/?hub.callback=http%3A//statusmate.
appspot.com/callback
&hub.topic=http%3A//buzz.googleapis.com/feeds/11223344/public/posted
&hub.verify=sync
&hub.mode=subscribe

15. Getting your stuff into Buzz
ATOM and RSS are your Friends
Media RSS
Activity Streams
PubSubHubbub - Appears instantly in Buzz.
We use XFN and Google profiles for a mutal authentication.
If you have access to the feed and profile, then you must own
both.
How?
Add a link to the feed in your profile
Add a rel="me" in your feed <link rel="me" href="http://google.
com/profiles/paul.kinlan"/>
We do the rest.

16. Forward the future
Read/Write API
AtomPub - For writing support
OAuth - delegated authorization
Salmon - Federated Comments and Activities

17. Ideas
Wrap your twitter feeds.
Add MediaRSS to the ATOM feed
Wrap your favorites feed
Integrate your service

18. Links
Help shape the API:
http://groups.google.com/group/google-buzz-api
Report Bugs:
http://code.google.com/p/google-buzz-api/issues/list
Buzz API: http://code.google.com/apis/buzz/
Open ID: http://openid.net/
WebFinger: http://code.google.com/p/webfinger/
Profiles: http://www.google.com/profiles
Pubsubhubbhub: http://code.google.com/p/pubsubhubbub/

19. Thank You!