実践Server Side Swift

by Yuki Takei

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࣮ફ Server Side Swift Yuki Takei Swift࣮ફೖ໳ץߦه೦Πϕϯτ Feb 24 2017

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Twitter͸ @noppoman722 Ͱ΍ͬͯ·͢

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• 2015೥12݄ΑΓɺServer Side SwiftͷϥΠϒϥϦ։ൃ΍ί ϛϡχςΟ΁ͷߩݙΛελʔτ • 2016೥2݄ʹSlimaneΛϦϦʔε(ݱࡏ։ൃ͸Stop) • 2016೥3݄͔ΒTokyo Server Side Swift Meetup։࢝ • 2016೥4݄͔ΒOpen-SwiftɺZewoίϛϡχςΟʹࢀՃ • 2016೥10݄ΑΓServer Work GroupͷεςʔΫϗϧμʔʹ • 2017೥1݄ΑΓSwiftΛόοΫΤϯυαʔϏεͷݴޠͱͯ͠ɺ αʔϏε։ൃΛελʔτ ๻ͱServer Side SwiftͷาΈ

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https://tokyo-ss-swift.connpass.com/

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• Server Side Swiftͷ࢖͍ॴ • Server Side Swiftͷ։ൃ؀ڥΛ੔͑Δ • SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯΛ࡞ΔϙΠϯτ • ࣮ફతͳWebΞϓϦέʔγϣϯΛ࡞Ζ͏ ΞδΣϯμ

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Server Side Swiftͷ࢖͍ॴ

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SwiftΛwebαʔϏεͰ࢖͏ϝϦοτ • ੩తݴޠͳΒͰ͸ͷ҆શੑɺॊೈͳݴޠ࢓༷ • ࣮ߦ଎౓ɺলΤω • VMɺGC͕ͳ͍ • iOSΞϓϦ։ൃʹ࢖ΘΕ͍ͯΔϥΠϒϥϦ͕ͦͷ ··࢖͑Δέʔε͕༗Δ

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• APIαʔόʔ(Node.js΍GoͰ࡞͍ͬͯΔͱ͜Ζ) • όονॲཧͳͲͷίϚϯυϥΠϯΞϓϦέʔγϣϯ • ը૾ॖখɺѹॖɺ҉߸ԽͳͲLLͰ͸࣌ؒͷ͔͔Δ෦෼ SwiftͷwebαʔϏεͰͷ࢖͍ॴ

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Server Side Swiftͷ։ൃ؀ڥΛ੔͑ͯΈΑ͏

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• Xcode8.2ΛࣄલʹΠϯετʔϧ͓͖ͯ͠·͠ΐ͏ ؀ڥߏஙͷલʹ….

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Server SideϓϩδΣΫτ͸ ίϚϯυϥΠϯΛ࢖ͬͯ࡞੒͍͖ͯ͠·͢

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Server Side SwiftϓϩδΣΫτͷ࡞੒ ϓϩδΣΫτ༻ͷσΟϨΫτϦ࡞੒

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εχϖοτ࡞੒ίϚϯυ Server Side SwiftϓϩδΣΫτͷ࡞੒

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Server Side Swiftͷ جຊతͳϑΝΠϧߏ੒ Server Side SwiftϓϩδΣΫτͷ࡞੒

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main.swiftͷத਎

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ίϚϯυϥΠϯ্ͰͷϏϧυͱ࣮ߦ ίϯύΠϧ & ϦϯΫ

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ίϚϯυϥΠϯ্ͰͷϏϧυͱ࣮ߦ .build/debugҎԼʹ࣮ߦՄೳͳϥΠϒϥ͕ग़དྷΔ

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ίϚϯυϥΠϯ্ͰͷϏϧυͱ࣮ߦ ࣮ߦ

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Swift Package ManagerΛ࢖ͬͯΈΑ͏

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• ͦͷ໊ͷ௨ΓɺSwift༻Package Manager(Appleެࣜ) • ௨শSPM • CocoaPods΍CarthageͱಉϨΠϠʔ • ϓϩδΣΫτ഑ԼͷPackage.swiftʹઃఆ΍ґଘΛॻ͖ ࠐΉ • ݱ࣌఺Ͱ͸ɺiOS΍MacͳͲͷUIΞϓϦ͸ະαϙʔτ Swift Package Managerͱ͸

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هड़ྫ

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…………… …………… …………… Ϗϧυ

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…………… …………… …………… ґଘϥΠϒϥϦͷclone Ϗϧυ

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…………… …………… …………… ίϯύΠϧ & ϦϯΫ Ϗϧυ

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XcodeͰ։ൃͯ͠ΈΑ͏

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SPMͰ࡞ͬͨϓϩδΣΫτ͸ɺ XcodeͰ։ൃ͢Δ͜ͱ΋ग़དྷ·͢ɻ

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XcodeͰ։ൃͯ͠ΈΑ͏ Package.swift͔ΒઃఆΛಡΈࠐΈɺ.xcodeprojΛ࡞੒͢Δ

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XcodeͰ։ൃͯ͠ΈΑ͏ ίϚϯυҰൃͰxcodeproj͕࡞੒͞ΕΔ

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XcodeͰ։ൃͯ͠ΈΑ͏ xcodeprojΛ։͖·͢

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Xcode্Ͱ࣮ߦ

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XCTest΋΋ͪΖΜ࢖͑·͢ʂ

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SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯ Λ࡞ΔϙΠϯτ

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SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯΛ࡞ΔϙΠϯτ ڧྗͳܕ҆શੑΛ׆͔͢

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σʔλϕʔε΍APIϨεϙϯεͷIO݁Ռ͸Anyܕ͕΄ͱΜͲ JSON MySQL

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σʔλϕʔε΍APIϨεϙϯεͷIO݁Ռ͸Anyܕ͕΄ͱΜͲ JSON MySQL AnyܕΛͦͷ··ѻ͏ͱ…

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σʔλϕʔε΍APIϨεϙϯεͷIO݁Ռ͸Anyܕ͕΄ͱΜͲ JSON MySQL unwrapɺόϦσʔγϣϯΛ౎౓ॻ͘͸Ίʹ…

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Server Side͸ؔΘΔਓ਺͕ଟ͍ͨΊɺ AnyܕΛ;ΜͩΜʹ࢖ͬͨίʔυ͸ϝϯς͕૬౰େม

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DBͷऔಘ݁ՌͳͲ͸͖ͪΜͱܕΛఆٛ͠·͠ΐ͏

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Enum ڧྗͳܕ҆શੑΛ׆͔͢ EnumʹΑΔύλʔϯϚονϯά͸ɺServer SideͰ΋༗ޮ HTTP Method HTTP Status

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Enum ڧྗͳܕ҆શੑΛ׆͔͢ ErrorͷύλʔϯϚονϯάͰɺΤϥʔϨεϙϯεΛॊೈʹ

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ܦݧ্ɺwebαʔϏεΛӡ༻͍ͯͯ͠ɺ αʔόʔ͕མͪΔେ͖ͳݪҼͷҰ͕ͭNullࢀর(ψϧϙ)Ͱ͢ɻ Optionalܕ ڧྗͳܕ҆શੑΛ׆͔͢

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Swiftʹ͸Optionalܕ͕͋ΓɺϓϩάϥϚ͸ͦͷ஋͕nullΛڐ༰ ͢Δ͔Ͳ͏͔Λࢹ֮తʹ൑அͰ͖·ͨ͠ ʢίϯύΠϥ͕ڭ͑ͯ͘ΕΔʣ Optionalܕ ڧྗͳܕ҆શੑΛ׆͔͢

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Optionalܕ ڧྗͳܕ҆શੑΛ׆͔͢ JavaScriptͰΫϥογϡ͢Δ͔΋͠Εͳ͍ྫ

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Optionalܕ ڧྗͳܕ҆શੑΛ׆͔͢ SwiftͰ҆શʹIO݁ՌΛѻ͏

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SwiftΛαʔόʔͰ࢖͏ϝϦοτͯ͠ɺ ͜ͷnullͷڐ༰ੑ͸ͱͯ΋େ͖ͳཁૉͰ͢ɻ

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SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯΛ࡞ΔϙΠϯτ ΫϥΠΞϯτͰϝδϟʔͳϥΠϒϥϦΛੵۃతʹ࢖͏

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• Swiftʹ͸iOSͳͲͰங͔ΕͨɺطଘͷΤίγες Ϝ͕͋Δ • UIΛ࣋ͨͳ͍௨৴ॲཧ΍σʔλγϦΞϥΠζʹ ಛԽͨ͠΋ͷ͸ߴ֬཰ͰServer SideͰ΋࢖͑Δ • SPMʹରԠ͍ͯ͠ͳ͍৔߹΋ɺগ͠ͷมߋͰ Server SideͰ࢖͑Δέʔε͕͋Δ SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯΛ࡞ΔϙΠϯτ ΫϥΠΞϯτͰϝδϟʔͳϥΠϒϥϦΛੵۃతʹ࢖͏

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• Himotoki • SwiftyJSON • swift-protobuf • RXSwift • JSONWebToken.swift αʔόʔαΠυͰ΋࢖͑ΔiOSͷϥΠϒϥϦʢ΄ΜͷҰ෦ʣ

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ंྠͷ࠶ൃ໌Λ߇͑ͯɺΤίγεςϜΛੵۃతʹ׆༻͠·͠ΐ͏

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SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯΛ࡞ΔϙΠϯτ UbuntuͰಈ͘͜ͱΛ࠷༏ઌʹ

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• GoͷΑ͏ͳϙʔλϏϦςΟ͸ະͩSwiftʹ͸ͳ͍ • SwiftެࣜαϙʔτͷLinux͸Ubuntu • MacͰ͸࢖͑ͯ΋UbuntuͰ࢖͑ͳ͍API͸݁ߏ͋Δ • ςετίʔυΛඞͣUbuntuͰ΋૸Βͤ·͠ΐ͏ SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯΛ࡞ΔϙΠϯτ UbuntuͰಈ͘͜ͱΛ࠷༏ઌʹ

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Linux൛SwiftͰϋϚͬͨ͜ͱᶃ CF**ͰDNSղܾΛࢼΈ͕ͨ…..

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CF**ͰDNSղܾΛࢼΈ͕ͨ….. Linux൛SwiftͰϋϚͬͨ͜ͱᶃ

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Linux൛Swiftʹ͸CF**Ͱ࢖͑ͳ͍΋ͷ͕͋Δ Linux൛SwiftͰϋϚͬͨ͜ͱᶃ

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Main thread͔Ͳ͏͔൑ఆ͠Α͏ͱͯ͠… Linux൛SwiftͰϋϚͬͨ͜ͱᶄ

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Main thread͔Ͳ͏͔൑ఆ͠Α͏ͱͯ͠… Linux൛SwiftͰϋϚͬͨ͜ͱᶄ

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Linux൛SwiftͰϋϚͬͨ͜ͱᶄ

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࣮૷͞Εͯͳ͍wwwww

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͜ͷΑ͏ʹɺະͩLinux൛SwiftͰ͸τϥοϓ͕ͪΒ΄Β

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MacͰಈ͍͔ͨΒͬͯ҆৺͠ͳ͍Α͏ʹʂ

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SwiftͰݎ࿚Ͱߴ଎ͳwebΞϓϦέʔγϣϯΛ࡞ΔϙΠϯτ GCDΛ׆༻ͯ͠ɺαʔόʔϦιʔεΛޮ཰తʹѻ͏

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GCDͱ͸ɺThread΍ඇಉظ໋ྩΛ؆୯ʹѻ͏ͨΊͷϥΠϒϥϦ GCDΛ͏·͘ѻ͏͜ͱ͕ɺSwiftͷServer SideΛ߈ུ͢Δ伴

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Dispatch Queue Serial Task Task Task Task Task queue.async {} Concurrent Task Task Task Task Task Task Task Task queue.async {} executing waiting balancing thread 1 thread 1 thread 2

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Dispatch Source Dispatch Source Socket ؂ࢹ Event Event Event ιέοτ΍ϑΝΠϧͷهड़ࢠΛ؂ࢹͯ͠ɺ ॻ͖ࠐΈ͕͋ͬͨλΠϛϯάͰΠϕϯτΛൃՐ select΍kqueueͱ͍ͬͨඇಉظܥͷsystem callΛந৅Խ͍ͯ͠Δ

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GCDΛۦ࢖ͯ͠ɺߴ଎ͳαʔόʔΛ࡞Γ·͠ΐ͏

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SwiftͰ࣮ફతͳWebΞϓϦέʔγϣϯ Λ࡞ͬͯΈΑ͏

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Ϣʔβʔ A Ϣʔβʔ B OAuth OAuth Callback Callback ͜Μͳײ͡ͷwebΞϓϦέʔγϣϯΛ࡞ͬͯΈ·ͨ͠ ChatϧʔϜ ᶃ ᶃ ᶄ ᶄ ᶅ ᶅ

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• GithubͷOAuthΛ࢖ͬͨϩάΠϯػೳ • JWTʹΑΔϢʔβʔೝূ(ηογϣϯ୅ସ) • σʔλ͸શͯMySQLʹอଘ͢Δ • ίʔυଆͰεΩʔϚ؅ཧ • View͸SPAͰఏڙ ͬ͘͟Γͱͨ͠ཁ݅

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https://github.com/noppoMan/SwiftJNChatApp

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σϞ

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https://www.youtube.com/watch?v=WI7BQQHVV_Y&feature=youtu.be ಈըURL͸ͪ͜Β

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• noppoMan/Prorosum …… HTTP Server • noppoMan/WebAppKit …… Routing, Middleware • noppoMan/SwiftKnex …… Mysql Client, Schema Migrator • apple/swift-protobuf …… Entities and JSON serializer • kylef/JSONWebToken.swift …… JWT encode/decode ࠓճ࢖ͬͨϥΠϒϥϦ

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noppoMan/Prorsum

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noppoMan/Prorosum • HTTP ServerͳͲͷSwiftඪ४Ͱఏڙ͞Ε͍ͯͳ͍ ωοτϫʔΫػೳΛิ׬͢Δ • LinuxͰಈ͘͜ͱΛલఏʹ։ൃ͞Ε͍ͯΔ • GoݴޠͷgoroutineͱChannelΛΠϯεύΠΞ͠ ͨɺඇಉظ/ಉظॲཧϞσϧ

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ProrsumͷαʔόʔΞʔΩςΫνϟ DispatchSource + DispatchQueueΛ࢖ͬͨ Πϕϯτۦಈ + WorkerThreadͷϋΠϒϦοτϞσϧ main thread DispatchSourceͰɺ listeningSocketΛ؂ࢹ Queue Queue Queue Queue Queue Queue Queue Queue Queue client DispatchQueue(concurrent) nonblocking I/O blocking I/O

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• Ͳ͏ͯ͠΋ɺCallbackϕʔεͷϑϩʔ੍ޚʹͳͬ ͯ͠·͏ • ConcurrentͰ࣮ߦ͢Δ৔߹ɺεϨουηʔϑΛҙ ࣝͯ͠ϓϩάϥϛϯάΛ͢Δඞཁ͕͋Δ DispatchQueueͷ໰୊఺

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thread Prorsumͷඇಉظ/ಉظॲཧϞσϧ Task1 Task2 Task3 send send send main thread receive Channel thread thread ProrsumͰ͸ݪଇͱͯ͠callbackʹΑΔϑϩʔ੍ޚ͸ߦΘͳ͍ɻ Prorosumͷఏڙ͢Δgoؔ਺ͱchannelʹΑΓɺฒྻॲཧͱͦͷಉظΛऔΔ Async Async Async Sync(Blocking)

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go()ͱChannelΛ࢖࢛ͬͨଇԋࢉͷྫ

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thread લճͷਤʹ౰ͯ͸ΊΔͱ Task1 Task2 Task3 send(1) send(2) send(3) main thread Channel thread thread go() go() go() receive(1) receive(2) receive(3)

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ProrsumͷύϑΥʔϚϯε Request/sec 0 17500 35000 52500 70000 Prorsum Kitura Go 1.7 HTTP Server Express 14,769 64,768 17,144 29,436 ɾwrk -d 30s -t 4 -c 20 ɾResponded with the 10 length of random JSON array ɾMachine: MacOS Sierra, 8 logical cores, 8GB RAM

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Routing΍Middleware • noppoMan/WebAppKitΛ࢖͍ͬͯΔ • WebAppKit͸ϓϩʔαϜ޲͚ͷRoutingɺ MiddlewareΛఏڙ͢ΔϑϨʔϜϫʔΫ • Express΍SinatraͷΑ͏ͳ΋ͷ • ೝূͳͲ͸͜ͷMiddlewareͰॲཧ͍ͯ͠Δ

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APIͱͷ௨৴ (NS)URLSessionΛ࢖ͬͯAPIͱ௨৴͍ͯ͠Δɻ ͨͩ͠ɺίʔϧόοΫϕʔεͷϑϩʔ੍ޚʹͨ͘͠ͳ͍ͷͰɺdataTaskResumtSync ͱ͍͏ϝιουΛ௥Ճͯ͠ɺpthread_cond_waitͰϒϩοΫ͢ΔΑ͏ʹ͍ͯ͠Δ Routes/GithubRoute.swift

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࣮͸APIKitΛ࢖͍͔ͨͬͨͷͰ͕͢ɺɺ

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objc_**͕LinuxͰ࢖͑ͳ͍…

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ͥͻLinuxରԠ͍ͨ͠Ͱ͢Ͷʂ

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• SwiftyJSONͳͲͷJSONϥΠϒϥϦ͸࢖͍ͬͯͳ͍ • EntityΛswift-protobufΛ࢖ͬͯఆ͍ٛͯ͠ΔͨΊɺͦ Ε͕ఏڙ͢ΔJSONγϦΞϥΠζػೳΛ࢖͍ͬͯΔ JSONͷऔѻ

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Swift͔ΒMySQLΛѻ͏ ͓ख੡ͷSwiftKnexͱ͍͏ϥΠϒϥϦΛ࢖͍ͬͯΔ

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• Mysql QueryBuilder • Schema Migration • Pure SwiftͰMySQLϓϩτίϧΛ࣮૷͍ͯ͠Δ noppoMan/SwiftKnex

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ܕ҆શʹselect݁ՌΛѻ͏

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ίʔυଆͰεΩʔϚ؅ཧ SwiftKnexʹ͸ɺεΩʔϚ؅ཧ/ϚΠάϨʔγϣϯػೳ͕උΘ͍ͬͯΔ

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Migration ClassΛ࡞੒͢Δ $ ./.build/debug/SwiftKnexMigration create ResourceName ΛίϚϯυϥΠϯ͔Β࣮ߦ͢Δ͜ͱͰɺMigration ClassΛ࡞੒

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Migration/20170218035306_CreateUser.swift Migration Classͷఆٛ

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Migrationͷ࣮ߦ/ϩʔϧόοΫ

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Ϋϥ΢υ΁ͷσϓϩΠͳͲɺ ࿩͍ͨ͜͠ͱ͸ଞʹ΋୔ࢁ͋ΔͷͰɺͥͻ࠙਌ձͰʂ

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SwiftͰͷαʔόʔαΠυ։ൃ͸ເ෺ޠͰ͸ͳ͘ɺ ͢ͰʹϦΞϧͳ΋ͷͰ͋Δͱ͍͏͜ͱ͕఻ΘΕ͹خ͍͠Ͱ͢ʂ

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠