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Chat+twitter app with lift
- 1. Lift のチュートリアルを改造 して Twitter 連携チャットを作る Scala勉強会第 9 回 in 渋谷 鹿島和郎（かしまかずお）
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- 3. Agenda • Chat Appdemo • Programs used – Lift – Dispatch • Code reading • Related Technologies – OAuth – Comet
- 4. Chat App demo •Authentication (OAuth) • Callback • Chat (Comet) • Known issues
- 5. This app uses… •Lift – Web framework – View first – http://liftweb.net/ • Databinder Dispatch – Library for http and http services – Written in Scala – http://dispatch.databinder.net/About
- 6. Code reading • Basics –index.html & OAuthTest.scala – Boot.scala – TwitterCallback.scala • Comet – index.html & Chat.scala • Model – User.scala
- 7. OAuth • Players – Provider(Twitter) – Consumer (app) – User (human) • Steps – The owner of the app registers it on dev.twitter.com. – The user approves the app to use his resource via API. – The app gets an access token. – The app uses the access token to use the API. • http://www.atmarkit.co.jp/fsecurity/special/106oa uth/oauth02.html
- 8. Comet • Traditional webapps (pull) – Request & response – Need real time? → A typical approach is Ajax polling. • Comet (push) – Server sends data when it’s ready. – How? → Several approaches
- 9. Comet (cont.) • Implementationmodels – Streaming – Long polling (★ 今回はこっち、のはず ) • Server side – Different challenges, approaches → Out of scope of this presentation • 参考 – Wikipediaのエントリ – Comet の正しい使い方：奥さん（ Cyboze Labs ）
- 10. Comet (cont.) • Implementationmodels – Streaming – Long polling (★ 今回はこっち、のはず ) • Server side – Different challenges, approaches → Out of scope of this presentation • 参考 – Wikipediaのエントリ – Comet の正しい使い方：奥さん（ Cyboze Labs ）