|
| 1 | +import Dispatch |
| 2 | +import Foundation |
| 3 | +import Kitura |
| 4 | +import LDSwiftEventSource |
| 5 | + |
| 6 | +struct StatusResp: Encodable { |
| 7 | + let name = "swift-eventsource" |
| 8 | + let capabilities = ["comments", "headers", "last-event-id", "post", "read-timeout", "report"] |
| 9 | +} |
| 10 | + |
| 11 | +struct CreateStreamReq: Decodable { |
| 12 | + let streamUrl: URL |
| 13 | + let callbackUrl: URL |
| 14 | + let initialDelayMs: Int? |
| 15 | + let readTimeoutMs: Int? |
| 16 | + let lastEventId: String? |
| 17 | + let headers: [String: String]? |
| 18 | + let method: String? |
| 19 | + let body: String? |
| 20 | + |
| 21 | + func createEventSourceConfig() -> EventSource.Config { |
| 22 | + var esConfig = EventSource.Config(handler: CallbackHandler(baseUrl: callbackUrl), url: streamUrl) |
| 23 | + if let initialDelayMs = initialDelayMs { esConfig.reconnectTime = Double(initialDelayMs) / 1000.0 } |
| 24 | + if let readTimeoutMs = readTimeoutMs { esConfig.idleTimeout = Double(readTimeoutMs) / 1000.0 } |
| 25 | + if let lastEventId = lastEventId { esConfig.lastEventId = lastEventId } |
| 26 | + if let headers = headers { esConfig.headers = headers } |
| 27 | + if let method = method { esConfig.method = method } |
| 28 | + if let body = body { esConfig.body = Data(body.utf8) } |
| 29 | + return esConfig |
| 30 | + } |
| 31 | +} |
| 32 | + |
| 33 | +class CallbackHandler: EventHandler { |
| 34 | + struct EventPayloadEvent: Encodable { |
| 35 | + let type: String |
| 36 | + let data: String |
| 37 | + let id: String? |
| 38 | + } |
| 39 | + |
| 40 | + struct EventPayload: Encodable { |
| 41 | + let kind = "event" |
| 42 | + let event: EventPayloadEvent |
| 43 | + } |
| 44 | + |
| 45 | + struct CommentPayload: Encodable { |
| 46 | + let kind = "comment" |
| 47 | + let comment: String |
| 48 | + } |
| 49 | + |
| 50 | + struct ErrorPayload: Encodable { |
| 51 | + let kind = "error" |
| 52 | + } |
| 53 | + |
| 54 | + let baseUrl: URL |
| 55 | + var count = 0 |
| 56 | + |
| 57 | + init(baseUrl: URL) { |
| 58 | + self.baseUrl = baseUrl |
| 59 | + } |
| 60 | + |
| 61 | + func onOpened() { } |
| 62 | + func onClosed() { } |
| 63 | + |
| 64 | + func sendUpdate<T: Encodable>(_ update: T) { |
| 65 | + count += 1 |
| 66 | + var request = URLRequest(url: baseUrl.appendingPathComponent(String(count), isDirectory: false)) |
| 67 | + request.httpMethod = "POST" |
| 68 | + let data = try! JSONEncoder().encode(update) |
| 69 | + URLSession.shared.uploadTask(with: request, from: data) { _, _, _ in }.resume() |
| 70 | + } |
| 71 | + |
| 72 | + func onMessage(eventType type: String, messageEvent msg: MessageEvent) { |
| 73 | + sendUpdate(EventPayload(event: EventPayloadEvent(type: type, data: msg.data, id: msg.lastEventId))) |
| 74 | + } |
| 75 | + |
| 76 | + func onComment(comment: String) { |
| 77 | + sendUpdate(CommentPayload(comment: comment)) |
| 78 | + } |
| 79 | + |
| 80 | + func onError(error: Error) { |
| 81 | + sendUpdate(ErrorPayload()) |
| 82 | + } |
| 83 | +} |
| 84 | + |
| 85 | +let stateQueue = DispatchQueue(label: "StateQueue") |
| 86 | +var nextId: Int = 0 |
| 87 | +var state: [String: EventSource] = [:] |
| 88 | + |
| 89 | +let router = Router() |
| 90 | + |
| 91 | +router.get("/") { _, resp, next in |
| 92 | + resp.send(StatusResp()) |
| 93 | + next() |
| 94 | +} |
| 95 | + |
| 96 | +router.delete("/") { _, resp, next in |
| 97 | + resp.send(["message": "Shutting down contract test service"]) |
| 98 | + next() |
| 99 | + Kitura.stop() |
| 100 | +} |
| 101 | + |
| 102 | +router.post("/") { req, resp, next in |
| 103 | + guard let createStreamReq = try? req.read(as: CreateStreamReq.self) |
| 104 | + else { |
| 105 | + resp.status(.badRequest).send(["message": "Body of POST to '/' invalid"]) |
| 106 | + return next() |
| 107 | + } |
| 108 | + let es = EventSource(config: createStreamReq.createEventSourceConfig()) |
| 109 | + let location: String = stateQueue.sync { |
| 110 | + state[String(nextId)] = es |
| 111 | + nextId += 1 |
| 112 | + return "/control/\(nextId - 1)" |
| 113 | + } |
| 114 | + es.start() |
| 115 | + resp.headers["Location"] = location |
| 116 | + resp.send(["message": "Created test service entity at \(location)"]) |
| 117 | + next() |
| 118 | +} |
| 119 | + |
| 120 | +router.delete("/control/:id") { req, resp, next in |
| 121 | + stateQueue.sync { |
| 122 | + if let es = state.removeValue(forKey: req.parameters["id"]!) { |
| 123 | + es.stop() |
| 124 | + resp.send(["message": "Shut down test service entity at \(req.matchedPath)"]) |
| 125 | + } else { |
| 126 | + resp.status(.notFound).send(["message": "Test service entity not found at \(req.matchedPath)"]) |
| 127 | + } |
| 128 | + } |
| 129 | + next() |
| 130 | +} |
| 131 | + |
| 132 | +Kitura.addHTTPServer(onPort: 8000, onAddress: "localhost", with: router) |
| 133 | +Kitura.run() |
0 commit comments