7BQPSΛ࢖ͬͯ7JTJPO1SPͱ 8FC4PDLFU௨৴Λͯ͠ΈΔ

ݪҰߒ ΧϯιΫΠϯμετϦʔζ୅ද 8FCσβΠϯ΍ϑϩϯτΤϯυΛத৺ʹ όοΫΤϯυɺΠϯϑϥͳͲࡶ৯తʹ͍Ζ͍Ζ ʮΑΓͻΖ͍ϑϩϯτΤϯυʯͱ͍͏αΠτΛ΍ͬͯΔ 93&"-"3+".ड৆ !LBSB@E

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7BQPSฤ $MJFOUTJEF7JTJPO1SP 4FSWFS4JEF7BQPS

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7BQPSͷಛ௃ ‣ 7BQPS5PPMCPYͱ͍͏$-*͕͋Δ ‣ 'MVFOUͱ͍͏03.͕ඪ४Ͱར༻Մೳ ‣ -FBGͱ͍͏ςϯϓϨʔτΤϯδϯ͕༻ҙ ‣ 2VFVFTɺ8FC4PDLFUɺ+85ͳͲαϙʔτ ‣ %PDLFSDPNQPTFɺ%PDLFS fi MF΋͍ͭͯ͘Δ

ಋೖ΋ָ ‣ Πϯετʔϧ΍؀ڥઃఆ͸ඇৗʹָ 4XJGUͱ9DPEF͕࢖͑Δ؀ڥͳΒ$ brew install vapor͚ͩ 8JOEPXTͷ84-؀ڥͰ΋4XJGUMZͱ͔Λ࢖ͬͯ4XJGUΛಋೖ w 74$PEFͰ΋։ൃ͕Ͱ͖Δ %PDLFS؀ڥͰߏஙͯ͠΋Α͍

9DPEFͰͦͷ··ฤूɾϏϧυ͕Մೳ

ϑΝΠϧߏ੒ . ├── Dockerfile ├── Package.swift ├── Public/ ├── Sources/ │ └── App/ │ ├── Controllers/ │ ├── configure.swift │ ├── entrypoint.swift │ └── routes.swift ├── Tests/ │ └── AppTests/ │ └── AppTests.swift └── docker-compose.yml

8FC4PDLFUΛ͔ͭ͏ʹ͸ func routes(_ app: Application) throws { app.get { req async in ... } app.get("hello") { req async -> String in ... } app.webSocket("echo") { req, ws in ws.onText { ws, text in print(text) } } } Sources/App/routes.swift

3PPN؅ཧ class Room { var connections: [String: [WebSocket]] func add(ws: WebSocket, room: String) { ... // adding WebSocket to connections } func send(ws: WebSocket, room: String, text: String) { ... // broadcast to connections } init() { connections = [:] } } Sources/App/Room.swift

3PPNΛͲ͏อ࣋͢Δ͔ ‣ ָͯ͠ ‣ άϩʔόϧม਺ͱ͓ͯ࣋ͬͯ͘͠ͷ͸ඍົͳײ͡ 7BQPSͰ(MPCBM4UPSBHFΛߏங͢Δํ๏͕͋Δ w #VJMEJOHBHMPCBMTUPSBHFGPS7BQPSIUUQTUIFTXJGUEFWDPNCVJMEJOHBHMPCBMTUPSBHF GPSWBQPS 3FEJTͷ1VC4VCΛར༻͢Δ w 7BQPSɿ3FEJTˠ0WFSWJFXIUUQTEPDTWBQPSDPEFTSFEJTPWFSWJFX )VNNJOHCJSEͰ͸ɺϦΫΤετؒͰ৘ใΛ΍ΓͱΓͰ͖Δ࢓૊Έ͕ ͋ΔΒ͍͠ w 1FSTJTUFOUEBUBIUUQTEPDTIVNNJOHCJSEDPEFTEPDVNFOUBUJPOIVNNJOHCJSE QFSTJTUFOUEBUB nonisolated(unsafe) var room = Room()

ίϯιʔϧ͔Β઀ଓͯ͠ΈΔ ‣ ࢖͏ϥΠϒϥϦ XFCTPDLFUOQN ‣ αϯϓϧίʔυ ࠓճ͸γϯϓϧͳαϯϓϧͳͷͰɺ OQNʹ͋Δ΋ͷΛͦͷ··࢖͏ ઀ଓઌ͸ฤू͓ͯ͘͠ client.connect('ws://localhost:8080/echo');

ίϯιʔϧ͔Β઀ଓͯ͠ΈΔ ‣ ઀ଓ $ npm run start > [email protected] start > node src/client.js WebSocket Client Connected Received: '1287346' Received: '4955304' Received: '12177183' Received: '13307824' Received: '16307205' Received: '5869357' Received: '12393997' Received: '7832726'

7JTJPO1SPฤ $MJFOUTJEF7JTJPO1SP 4FSWFS4JEF7BQPS

8FC4PDLFUϥΠϒϥϦ4UBSTDSFBN ‣ ࠓճ઀ଓʹ࢖ͬͨϥΠϒϥϦ 4UBSTDSFBN ‣ ಛ௃ ಋೖָ͕ շద ڧͦ͏ Ωϟϥ͕ © IUUQTHJUIVCDPNEBMUPOJBN4UBSTDSFBN

8FC4PDLFUʹ઀ଓ͢Δํ๏ ‣ 9DPEFʹͯύοέʔδΛಋೖ͠ɺJNQPSU ‣ ؆୯ͳΞΫηεํ๏ import Starscream ... var request = URLRequest(url: URL(string: "http://localhost:8080/echo")!) request.timeoutInterval = 5 socket = WebSocket(request: request) socket.delegate = self socket.connect() ...

8FC4PDLFU$POUSPMMFSͷ༻ҙ class WebSocketController: WebSocketDelegate, ObservableObject { private var socket: WebSocket! @Published var isConnected = false @Published var messages: [String] = [] func didReceive(event: WebSocketEvent, client: WebSocketClient) { ... } init() { connect() } func connect() { ... } func disconnect() { ... } } WebSocketController.swift

$POUFOU7JFX͔Β࢖͏ ‣ 8FC4PDLFU$POUSPMMFS͔ΒૹΒΕͨNFTTBHFΛ औಘ struct ContentView: View { @ObservedObject var client = WebSocketController() init() { client = WebSocketController() } var body: some View { VStack { if client.isConnected { List { ForEach(client.messages, id: \.self) { m in Text(m) ...

ͦͷଞ΍͓ͬͯ͘ॲཧ ‣ ઀ଓॲཧ·ΘΓ ઀ଓલͷঢ়ଶɺ੾அ࣌ͷදࣔͳͲ ‣ ઀ଓΠϕϯτͷϋϯυϦϯά DPOOFDUFEEJTDPOOFDUFEUFYUCJOBSZQJOHQPOH WJBCJMJUZ$IBOHFESFDPOOFDU4VHHFTUFEDBODFMMFEFSSPS QFFS$MPTFE ‣ 4XJGU6*·ΘΓͷΠϕϯτॲཧ PO"QQFBS΍PO%JTBQQFBSͳͲ

·ͱΊ $MJFOUTJEF7JTJPO1SP 4FSWFS4JEF7BQPS

7BQPS7JTJPO1SPͰ8FC4PDLFU ‣ ͙͢ϦΞϧλΠϜίϯςϯπͮ͘ΓΛ࢝ΊΒΕΔ ‣ ͣͬͱ4XJGUΛॻ͍͍ͯΒΕΔ ‣ *%&΋͓ͳ͡Ͱ͍͚Δ ‣ 8FC4PDLFUٕज़ʹֶ͍ͭͯ΂Δ

7BQPSͰਐΊ͍ͯΔϓϩδΣΫτ ‣ ʮΑΓͻΖ͍ϑϩϯτΤϯυʯ7BQPSԽ ݱঢ়/FYUKT$POUFOUGVM$MPVE fl BSF1BHFT ‣ ϋοΧιϯ΍ϓϩτλΠϐϯά༻ͷ 8FC4PDLFUαʔόͷ΋ͱΛͭ͘Δ ϋοΧιϯͷରઓܕίϯςϯπͷόοΫΤϯυ෦෼୲౰ͱ͔

7BQPSΛ࢖ͬͯ7JTJPO1SPͱ 8FC4PDLFU௨৴Λͯ͠ΈΔ ͋Γ͕ͱ͏͍͟͝·ͨ͠