My presentation on OpenSocial app development from the Confoo Conference

1. How to create social
apps for millions of
users
Bastian Hofmann
VZnet Netzwerke Ltd.

2. About me

3. Questions? Ask!

4. • ... a set of APIs to access the social graph of
users
• ... a specification for including 3rd party
applications (gadgets) into social services

7. What is a Gadget?
• XML file with HTML and
JavaScript (and CSS,
Images, Flash, ...)
• Application based on the
Google Gadgets
specification
• Can be included on
various platforms

8. Rendering

9. Social APIs

10. Views

11. CANVAS

12. PROFILE

13. POPUP

14. GROUP

15. EMBED

16. PREVIEW

17. Features

19. OpenSocial Templates Proxied Content
PubSub
OSAPI OAuth Proxy Requests
OpenSocial on the iPhone
AppData
DataPipelining
OEmbed
Let‘s start programming

20. https://github.com/bashofmann/
bgf2010_demo_gadget

21. DEMO

22. Proxied Content

23. DEMO

24. Proxy
Container Shindig
vz.net apivz.net
Ajax
HTTP
Gadget Gadget Backend
Ajax
apivz.net api.twitter.com

25. DEMO

26. OAuth 1.0a Flow
+----------+ +---------------+
| -+----(B)-- Request Token -------->| |
| End-user | | Authorization |
| at |<---(C)-- User authenticates --->| Server |
| Browser | | |
| -+----(D)-- Verifier -------------<| |
+-|----|---+ +---------------+
| | ^ v
(B) (D) | |
| | | |
^ v | |
+---------+ | |
| |>---(A)-- Redirect URL ---------------| |
| Web |<---(A)-- Request Token + Secret -----| |
| Client |>---(E)-- Request Token, Verifier ----' |
| |<---(E)-- Access Token + Secret -------------'
+---------+
Every Request: Client Credentials, Nonce, Timestamp, Signature
http://oauth.net/

27. h"p://twi"er.com/Bas2anHofmann
h"p://joind.in/2915
h"p://studivz.net/bas2an
h"p://slideshare.net/bashofmann
bhofmann@vz.net
h"p://developer.studivz.net