Server-Side Swift @ Devoxx FR

Transcript

1. Swi! Côté Serveur 1
2. Salut 2
3. Simone Cive!a 3
4. Je suis un développeur iOS 4
5. 7 ans 5
7. 4 ans 7
14. Enfin... 14
15. Plan 1. Les Origines 2. État de l'art 3. Pourquoi l'utiliser ? 4. Swift Server dans la vraie vie 5. Évolutions 15
16. 1. Les origines 16
19. Pourquoi Open Source ? 19
25. 2. État de l'art 25
26. Swi! 3.1 26
27. 1.0 27
28. 1.1 28
29. 1.2 29
30. 2.0 30
31. 2.1 31
32. 2.2 32
33. 2.3 33
34. 3.0 34
35. Swi! 3.1 35
36. En 2015-16 1 version tous les 2 mois 36
37. Un langage (presque) finalisé 37
38. Un langage complet 38
44. bibliothèques tierces 44
45. Beaucoup de bibliothèques tierces stables 45
49. Bibliothèques C 49
50. Frameworks Web 50
56. Swi! Package Manager 56
57. SPM swift package init swift package fetch swift package update swift package generate-xcodeproj 57
58. Swi! Package Catalog 58
62. Quelques images Docker — swiftdocker/swift/ — ibmcom/kitura-ubuntu/ — zewo/todobackend/ 62
63. Qualité du code 63
68. Metriques de qualité Pour en savoir plus... speakerdeck.com/viteinfinite/be-the-quality-you-want- to-see-in-your-app-swift-edition 68
71. nuclide.io/docs/languages/swift/ 71
72. ! 72
73. Enfin... 73
74. 3. Pourquoi l'utiliser ? 74
75. Développement actif 75
82. Performance 82
83. Performance 83
84. Performance 84
85. Mémoire Source: http://benchmarksgame.alioth.debian.org 85
86. Applications isomorphes 86
87. GCD 87
88. 4. Dans la vraie vie 88
91. L'application Serveur 1. Routing 2. Fichiers statiques 3. Proxy YouTube 4. Caching 91
92. Package.swi! import PackageDescription let package = Package( name: "XebiaTV", dependencies: [ .Package(url: "https://github.com/vapor/vapor.git", majorVersion: 1, minor: 5), .Package(url: "https://github.com/vapor/redis-provider.git", majorVersion: 1) ] ) 92
93. Router import Foundation import Vapor let drop = Droplet() let categoryController = CategoryController() let youtubeController = YouTubeController() drop.get("/categories", handler: categoryController.categories) drop.get("/playlistItems", handler: youtubeController.playlistItems) drop.get("/search", handler: youtubeController.search) drop.get("/live", handler: youtubeController.live) drop.get("/video", String.self, handler: youtubeController.video) drop.run() 93
94. Fichiers statiques import Foundation import Vapor import Core import HTTP final class CategoryController { private let dataLoader = DataFile() func categories(_ req: Request) throws -> ResponseRepresentable { let fileBody = try dataLoader.load(path: drop.workDir + "Data/categories.json") return Response(body: .data(fileBody)) } } 94
95. Proxy YouTube public final class YouTubeController { // ... func search(_ req: Request) throws -> ResponseRepresentable { let query = "\(googleApisBaseUrl)/search?key=\(apiKey)&channelId=\(channelId)" return try drop.client.get(query) } } 95
96. // ... public func video(_ req: Request, videoId: String) throws -> ResponseRepresentable { let cacheKey = "video-\(videoId)" guard let cached = try cacheService.load(for: cacheKey) else { let urls = try videoUrls(for: videoId) try cacheService.save(node: urls, with: cacheKey, expiration: cacheExpiration) return try JSON(node: urls) } return try JSON(node: cached) } private func videoUrls(for videoId: String) throws -> Node { guard let urls = try LiveStreamerReader.read(videoId: videoId) else { throw Error.noVideo } return Node(["urls": Node.array(urls)]) } 96
97. Intégration avec LiveStreamer static func launch(_ command: String, args: [String] = []) throws -> Data { #if os(Linux) let task = Task() #else let task = Process() #endif let pipe = Pipe() task.launchPath = command task.arguments = args task.standardOutput = pipe task.launch() let data = pipe.fileHandleForReading.readDataToEndOfFile() task.waitUntilExit() return data } 97
98. Cache avec Redis public protocol CacheService { func load(for key: String) throws -> Node? func save(node: Node, with key: String, expiration: TimeInterval) throws } public class RedisService : CacheService { private let drop: Droplet public init(drop: Droplet) throws { try drop.addProvider(VaporRedis.Provider(config: drop.config)) self.drop = drop } public func load(for key: String) throws -> Node? { return try drop.cache.get(key) } public func save(node: Node, with key: String, expiration: TimeInterval) throws { try drop.cache.set(key, node) if let redisCache = drop.cache as? RedisCache { try redisCache.redbird.command("EXPIRE", params: [key, "\(Int(expiration))"]) } } } 98
99. Build $ swift build Compile CLibreSSL xts128.c Compile CLibreSSL x_x509a.c Compile CLibreSSL xcbc_enc.c Compile CLibreSSL x_spki.c .... Compile Swift Module 'libc' (1 sources) Compile Swift Module 'SocksCore' (15 sources) Compile Swift Module 'Jay' (21 sources) Linking CLibreSSL Compile Swift Module 'Core' (28 sources) Compile Swift Module 'Routing' (11 sources) Compile Swift Module 'HTTPRouting' (5 sources) Compile Swift Module 'TypeSafeRouting' (3 sources) Compile Swift Module 'Cache' (3 sources) Compile Swift Module 'Auth' (15 sources) Compile Swift Module 'Vapor' (92 sources) Compile Swift Module 'VaporRedis' (2 sources) Compile Swift Module 'App' (6 sources) 99
100. Tests class AppTests: XCTestCase { // ... Create a StubCategoryController func testCategoryRoute() throws { let drop = try makeTestDroplet(categoryController: StubCategoryController()) let request = try Request(method: .get, uri: "/categories") let response = try drop.respond(to: request) let jsonBody = try JSON(bytes: response.body.bytes!) XCTAssertEqual(jsonBody["categories"]?.string, "someCategory") } } 100
102. Tout s'est bien passé™ 102
103. Enfin... 103
106. Cross platform #if os(Linux) import Glibc #else import Darwin #endif 106
107. Swift Build 107
108. Swi! Package Manager Mess swift package generate-xcodeproj 108
109. Tester c'est linker (?) Undefined symbols for architecture x86_64: "test2.test2.init () -> test2.test2", referenced from: test2Tests.test2Tests.(testExample () -> ()). (implicit closure #1) in test2Tests.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 109
110. 5. Évolutions 110
111. Encore plus de Frameworks 111
112. Encore plus de APIs Swi! 112
115. Peut-on le déployer en prod ? 115
116. Oui ! 116
117. Enfin... 117
118. Merci ! 118
119. Simone Cive!a 119
120. Je suis un développeur iOS 120
121. Je suis un développeur Back 121
122. Enfin... 122
124. Be a Be!er Developer beabe!er.ninja 124