This document summarizes a talk about developing a Facebook application using the Scheme programming language. It discusses using the Mona OS and Mosh Scheme, integrating with the Facebook Graph API to access social graph data like friends' details. It notes the application was written in 729 lines of Scheme code in 4 hours. Advantages of Scheme for this include easily parsing JSON responses as S-expressions and Scheme's functional programming approach.

1. Facebook App
in Scheme
Higepon
shibuya.lisp Tech Talk #7
2011 10 22

2. Higepon
• @higepon
• Mona OS
• http://www.monaos.org
• Mosh Scheme
• http://mosh.monaos.org
2011 10 22

3. Facbook App
2011 10 22

4. Facbook App
2011 10 22

5. http://lovamimi .com/
• Integrated with Facebook
• ja/en
• PC/iPhone/Android
• Written in Scheme
2011 10 22

6. Popular secrets
•
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7. Popular secrets
•
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8. Popular secrets
•
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9. Popular secrets
•
facebook
2011 10 22

10. Facebook App?
• Facebook Graph API
• Social Graph Data
2011 10 22

11. Facebook App?
• Facebook Graph API
• Social Graph Data
2011 10 22

12. 2011 10 22

13. 2011 10 22

14. Graph API
• Friends
• Name, Age, Phone number, Photo, Birthday
• Post, Likes, Checkin, Online Presence
• Work History, Message
• Offline Access, Publish Stream
2011 10 22

15. Wrote in Scheme
•
• 729 lines
• Mosh has facebook/cgi/template library
• 4 hours + coke = First version
• MySQL / Apache
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16. Advantage of
Scheme / Lisp
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17. 2011 10 22

18. S-Exp
• Graph API returns JSON
• Not human readable!
• From JSON to S-Exp
• S-Exp is much easier to read and use
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19. Don’t use S-Exp for
• Data Storage
• MySQL is much better
• Template
• Can’t copy and paste
• Not everyone can read/write.
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20. Scheme way
• (call-with-cgi ...)
• (call-with-connection ...)
• i18n
• (parameterize ([lang ...])
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21. Summary
• Write your Facebook App in Scheme!
• Use Mosh
• facebook/cgi/template libraries
2011 10 22