Firebase Authorization

Transcript

1. QPUBUPUJQT
   Firebase
   Authorization
   Ͱେมͩͬͨ͜ͱ
   

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2. @nakajijapan
   Software Engineer
   CAMPFIRE / iOSDC / NKJ Internet
   iOS / Android / Web / macOS
   

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3. NKJMultiMovieCaptureView
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   NKJPagerViewController
   PhotoSlider
   Teiten
   GitHub
   Sengiri
   Shari
   Ajimi
   Kazaguruma
   iOSDC 2017
   Izumo
   

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4. Izumo
   macOS
   iPhone / iPad
   Markdown Note Tool
   

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6. DJSDMFDJ GBTUMBOF
   DPEBDZ
   J5VOFT$POOFDU
   'BCSJD
   #FUB
   $SBTIMZUJDT
   "QQ4UPSF
   $PEF$PWFSBHF
   4XJGUMJOU
   4XJGUGPSNBU
   'JSFCBTF
   "OBMZUJDT
   "VUIFOUJDBUJPO
   1PMDB
   5FTUT
   1VTI
   Continuous Delivery
   

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7. Firebase
   Authentication
   

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9. 'JSFCBTF"VUIFOUJDBUJPOʹ͸ɺόοΫΤϯ
   υαʔϏεɺ࢖͍΍͍͢4%,ɺΞϓϦͰͷϢʔ
   βʔೝূʹ࢖༻Ͱ͖Δ6*ϥΠϒϥϦ͕༻ҙ͞Ε
   ͍ͯ·͢ɻ'JSFCBTF"VUIFOUJDBUJPOͰ͸ɺύ
   εϫʔυɺి࿩൪߸ɺҰൠతͳϑΣσϨʔγϣϯ
   *%ϓϩόΠμʢ(PPHMFɺ'BDFCPPLɺ5XJUUFSʣ
   ͳͲΛ࢖༻ͨ͠ೝূΛߦ͏͜ͱ͕Ͱ͖·͢ɻ
   

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10. Firebase Authentication
    • ϩάΠϯΛ׬ྃ͢Δ
    • tokenΛϔομʹՃ͑ͯϦΫΤετ
    • αʔόʔଆͰݕূ
    

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11. ⚠
    

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12. ⚠
    • Tokenͷ༗ޮظݶ͸̍࣌ؒ
    

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13. ⚠
    • Tokenͷ༗ޮظݶ͸̍࣌ؒ
    • getIDTokenForcingRefresh()ͷར༻
    • ແ͚Ε͹ɺ৽͍͠tokenΛൃߦ
    

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14. Retry
    

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16. ⚠
    • ࣌ʑϦΫΤετʹࣦഊ͢Δ
    • ͦͷޙɺ௨৴͸࠶։͞ΕΔ
    

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17. RxSwift
    

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18. func retryWithAuthIfNeeded() -> Observable {
    let firebaseAuthProvider = FirebaseAuthProvier()
    return self.retryWhen({ (errors: Observable) in
    errors.enumerated().flatMap { retryCount, error -> Observable in
    guard case let Moya.MoyaError.statusCode(response) = error else {
    return Observable.error(error)
    }
    if response.statusCode != 401 {
    return Observable.error(error)
    }
    if response.statusCode == 401 && retryCount >= 2 {
    return Observable.error(error)
    }
    return firebaseAuthProvider.auth().do(onError: { error in
    throw error
    }).map { _ in () }
    }
    })
    }
    

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19. func auth() -> Observable {
    return Observable.create({ observe -> Disposable in
    self.firebaseAuth { success in
    observe.on(.next(success))
    observe.on(.completed)
    }
    return Disposables.create()
    })
    }
    

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22. ඇಉظ
    

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23. DispatchSemaphore
    

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24. func auth() -> Observable {
    let semaphore = DispatchSemaphore(value: 1)
    var authError: Error?
    return Observable.create({ observer in
    Auth.auth().addStateDidChangeListener({ _, user in
    guard let user = user else {
    authError = FirebaseAuthError.unknownUser
    semaphore.signal()
    return
    }
    user.getIDTokenForcingRefresh(true, completion: { token, error in
    if error != nil {
    authError = FirebaseAuthError.noAuthToken
    semaphore.signal()
    return
    }
    UserCredentials.shared.accessToken = token
    semaphore.signal()
    })
    })
    semaphore.wait()
    if authError != nil {
    observer.onError(authError!)
    }
    observer.onNext(UserCredentials.shared.accessToken ?? "")
    observer.onCompleted()
    return Disposables.create()
    })
    }
    

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26. DispatchSemaphore
    

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27. func auth() -> Observable {
    return Observable.create({ observe -> Disposable in
    self.firebaseAuth { success in
    observe.on(.next(success))
    observe.on(.completed)
    }
    return Disposables.create()
    })
    }
    

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28. func auth() -> Observable {
    return Observable.create({ observe -> Disposable in
    self.firebaseAuth { success in
    observe.on(.next(success))
    observe.on(.completed)
    }
    return Disposables.create()
    })
    }
    

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29. func auth() -> Observable {
    return Observable.create({ observe -> Disposable in
    self.firebaseAuth { success in
    observe.on(.next(success))
    observe.on(.completed)
    }
    return Disposables.create()
    })
    }
    ద੾ͳΤϥʔॲཧ͕ߦΘΕ͍ͯͳ͔ͬͨ
    ੒ޭͯ͠΋ࣦഊͯ͠΋OFYUͯ͠DPNQMFUFE
    

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30. func auth() -> Observable {
    var authError: Error?
    return Observable.create({ observer in
    Auth.auth().addStateDidChangeListener({ _, user in
    guard let user = user else {
    observer.onError(FirebaseAuthError.unknownUser!)
    return
    }
    user.getIDTokenForcingRefresh(true, completion: { token, error in
    if error != nil {
    observer.onError(FirebaseAuthError.noAuthToken!)
    return
    }
    observer.onNext(token)
    observer.onCompleted()
    })
    })
    return Disposables.create()
    })
    }
    

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32. Wrap Up
    

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33. Wrap Up
    • Token͕੾Εͨͱ͖ͷରॲΛߟྀ͢Δ
    • retryWhenͰTokenΛߋ৽ͯ͠ϩάΠϯঢ়
    ଶΛҡ࣋͢Δ
    • RxSwiftؤுΔ
    

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34. Thanks.
    
    

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