Scotty + Aeson + Persistentで作るJSON Web API

Transcript

1. Scotty + Aeson + PersistentͰ࡞ΔJSON Web API
   גࣜձࣾAiming ౻ଜେհ
   @ Yesodษڧձୈ2ճ, 2012-07-07
   

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2. ࣗݾ঺հ
   • ౻ଜେհ
   • http://fujimuradaisuke.com @ffu_
   • גࣜձࣾAimingॴଐ
   • Haskell޷͖ͷRuby on RailsϓϩάϥϚʔ
   • ࠷ۙ͸JavaScript/CoffeeScript΋Α͘ॻ͍͍ͯΔ
   • ΞδΞͷྉཧͱΞϝϦΧͷϏʔϧɺΞϧβεͷϫΠϯ͕޷͖
   • ϥςϯΞϝϦΧจֶ΋޷͖
   

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3. ͱ͜ΖͰɺͳͥࠓJSON Web APIͳͷ͔
   • ͳΜ͔ͩ࠷ۙJSON Web APIΛ࡞Δػձ͕ଟ͍
   • ҰͭͷΞϓϦέʔγϣϯΛෳ਺ΫϥΠΞϯτͰಈ͔͢ࣄྫ͕૿͖͑ͯͨ
   • Mobile, PC, iOS/Android Nativeશ෦ʹల։ͱ͔
   • ϑϩϯτΤϯυͰUIΛߏங͢Δٕज़ͷൃୡɾਁಁ
   • ΫϥΠΞϯτɾαʔόʔͷ෼ۀ͸ਐΈͦ͏
   

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4. ಥવͰ͕͢Yesod͸͍·͍ͪͩͱࢥ͏
   • ࠷ۙWebσβΠϯ/ϑϩϯτΤϯυ։ൃ͕Ұஈͱ೉͘͠ͳ͖ͬͯͨؾ͕͢Δ
   • ͳͷͰΫϥΠΞϯτʗαʔόʔͰ෼ۀ͕Ͱ͖ͳ͍ͱݫ͍͠
   • Έͳ͞ΜHamletͱCassiusͰϓϩμΫγϣϯϨϕϧͷϨεϙϯγϒͳϚʔΫ
   ΞοϓͰ͖·͔͢ʁ
   • Α͏΍͘sass/less͕ਁಁ͖ͯͨ͠ͷʹ·ͨ৽͍ٕ͠ज़Λ…
   • ͔͠΋΄ͱΜͲҰॹͩ͠…
   • Web APIͱͯ͠࢖͏ͱͳΔͱϑϧελοΫͷ౓͕ա͗Δ
   • ͳͥ࢖͏༧ఆͷͳ͍ೝূϥΠϒϥϦͷΠϯετʔϧΛٻΊΒΕΔͷ͔
   

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5. ͦ͜ͰWeb API͸scottyͰ࡞Ζ͏Ͱ͸ͳ͍͔
   • Web API࡞Γ͸DBΞΫηεͱϧʔςΟϯά͑͞Ͱ͖Ε͹جຊOK
   • ྫ͑͹RubyͩͱWeb API࡞Δ࣌RailsͰ͸ͳ͘sinatraͬͯͷ͸Α͋͘Δ
   • ϥΠϒϥϦͷґଘؔ܎͸গͳ͍΄͏͕Կ͔ͱ޾ͤ
   • DB͸persistentɺJSON͸aesonͰ΍ͬͯΈΑ͏
   

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6. scottyʹ͍ͭͯ
   • RubyͷsinatraΠϯεύΠΞͷWeb Application Framework
   • https://github.com/xich/scotty/
   • γϯϓϧͳAPI
   • Yesodͱಉ͘͡waiϕʔε
   

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7. aesonʹ͍ͭͯ
   • Real World HaskellͷஶऀɺBryan O'Sullivan͞Μͷ࡞ͬͨJSONϥΠϒϥϦ
   • https://github.com/bos/aeson
   • ·ΔͰJSONͷΑ͏ͳߏจͰॻ͚ΔDSL(?)͕େมศར
   • ଎͍Β͍͠
   

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8. persistentʹ͍ͭͯ
   • ͝ଘ஌YesodಉࠝͷORM
   • (͔͠͠ɺ”Object”ʹϚοϐϯά͞ΕͯΔؾ഑͸શ͘ແ͍ʣ
   • http://www.yesodweb.com/book/persistent
   • PostgreSQL, SQLite, MongoDB, MySQLʹରԠ
   • QuasiQuoteͰςʔϒϧఆٛɺϚΠάϨʔγϣϯ΋͋Δ
   • ܕνΣοΫ෇͖ͷSQLͬͯײ͡Ͱ࢖͍΍͍͢
   

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9. Ͱ͖·ͨ͠
   • ݁࿦͔Βݴ͏ͱͱͯ΋޾ͤͳ૊Έ߹ΘͤͰͨ͠
   

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10. persistentͱaesonͷ૬ੑ͕͢͹Β͔ͬͨ͠(1)
    • ςʔϒϧఆٛͨ͠ΒɺͦΕΛToJSON/FromJSONͷΠϯελϯεʹ͢Δ
    

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11. persistentͱaesonͷ૬ੑ͕͢͹Β͔ͬͨ͠(2)
    • ͢ΔͱɺDBͷߦΛJSONͱͯ͠ѻ͑Δ(ToJSONͷΠϯελϯεʹͳΔͷͰʣ
    • ͳͷͰɺscottyͰͦͷ··JSONϨεϙϯεͱͯ͠ฦͤΔ
    

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12. persistentͱaesonͷ૬ੑ͕͢͹Β͔ͬͨ͠(3)
    • ࠓ౓͸ςʔϒϧͱಉ͡εΩʔϚͷJSONΛPOST͢Δͱɺ
    • ͦͷ··ߦͱͯ͠DBʹೖΕΒΕΔʢFromJSONͷߦͱͯ͠ड͚औΕΔ͔Βʣ
    

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13. ͜Ε͸͔ͳΓΤϨΨϯτͳͷͰ͸
    • ͜ͷهड़ྔͰDB͔Βͷऔಘ/DB΁ͷ௥Ճ͕Ͱ͖·͢
    • ͍͢͝ʂ
    

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14. ΩϥʔϥΠϒϥϦͷ༧ײ
    • ґଘؔ܎͕গͳ͍ͷͰίϯύΠϧ΋ָ
    • ܕΫϥεΛ׆͔ͤΔ
    • Web APIͳΒHaskellͰ΋ΫϥΠΞϯτ։ൃͱͷڠಇ΋໰୊ͳ͠
    • Ή͠ΖϥϯλΠϜΤϥʔ͕ແ͍ͷͰΫϥΠΞϯτ։ൃ͸޾ͤ
    

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15. ༨ஊ
    • ͪͳΈʹҐஔ৘ใܥͷWebαʔϏεΛ࡞Ζ͏ͱͯ͠·ͨ͠
    • ΫϥΠΞϯτ͸Backbone.js, CoffeeScriptɺGoogle Maps͋ͨΓΛར༻
    • ࣮ࡍͷͱ͜ΖɺΫϥΠΞϯτͷίʔυΛॻ͍ͯΔํ͕௕͔ͬͨ…
    • HTMLςϯϓϨʔτ͸mustacheΛ࢖ͬͨɻ͜Ε΋ྑ͔ͬͨ
    • ·ͩෳࡶͳ͜ͱΛ΍ͬͯͳ͍ͷͰɺམͱ͕݀͋͠Γͦ͏
    • ೝূ·ΘΓ͸·ͩະணखɻམͱ݀͠͸͔͜͜…ʁ
    • Template HaskellΛ࢖ͬͨΒToJSON/FromJSONʹ͢Δͷ΋ࣗಈͰͰ͖ͦ͏ͳ
    ؾ͕…
    

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16. ͓ΘΓ
    • ιʔείʔυ https://github.com/fujimura/spot
    • ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
    

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