620 lines
24 KiB
Swift
620 lines
24 KiB
Swift
import ClawdbotProtocol
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import Foundation
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import OSLog
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public protocol WebSocketTasking: AnyObject {
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var state: URLSessionTask.State { get }
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func resume()
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func cancel(with closeCode: URLSessionWebSocketTask.CloseCode, reason: Data?)
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func send(_ message: URLSessionWebSocketTask.Message) async throws
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func receive() async throws -> URLSessionWebSocketTask.Message
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func receive(completionHandler: @escaping @Sendable (Result<URLSessionWebSocketTask.Message, Error>) -> Void)
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}
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extension URLSessionWebSocketTask: WebSocketTasking {}
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public struct WebSocketTaskBox: @unchecked Sendable {
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public let task: any WebSocketTasking
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public var state: URLSessionTask.State { self.task.state }
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public func resume() { self.task.resume() }
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public func cancel(with closeCode: URLSessionWebSocketTask.CloseCode, reason: Data?) {
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self.task.cancel(with: closeCode, reason: reason)
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}
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public func send(_ message: URLSessionWebSocketTask.Message) async throws {
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try await self.task.send(message)
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}
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public func receive() async throws -> URLSessionWebSocketTask.Message {
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try await self.task.receive()
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}
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public func receive(
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completionHandler: @escaping @Sendable (Result<URLSessionWebSocketTask.Message, Error>) -> Void)
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{
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self.task.receive(completionHandler: completionHandler)
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}
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}
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public protocol WebSocketSessioning: AnyObject {
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func makeWebSocketTask(url: URL) -> WebSocketTaskBox
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}
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extension URLSession: WebSocketSessioning {
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public func makeWebSocketTask(url: URL) -> WebSocketTaskBox {
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let task = self.webSocketTask(with: url)
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// Avoid "Message too long" receive errors for large snapshots / history payloads.
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task.maximumMessageSize = 16 * 1024 * 1024 // 16 MB
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return WebSocketTaskBox(task: task)
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}
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}
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public struct WebSocketSessionBox: @unchecked Sendable {
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public let session: any WebSocketSessioning
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public init(session: any WebSocketSessioning) {
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self.session = session
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}
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}
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public struct GatewayConnectOptions: Sendable {
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public var role: String
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public var scopes: [String]
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public var caps: [String]
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public var commands: [String]
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public var permissions: [String: Bool]
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public var clientId: String
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public var clientMode: String
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public var clientDisplayName: String?
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public init(
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role: String,
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scopes: [String],
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caps: [String],
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commands: [String],
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permissions: [String: Bool],
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clientId: String,
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clientMode: String,
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clientDisplayName: String?)
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{
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self.role = role
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self.scopes = scopes
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self.caps = caps
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self.commands = commands
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self.permissions = permissions
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self.clientId = clientId
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self.clientMode = clientMode
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self.clientDisplayName = clientDisplayName
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}
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}
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// Avoid ambiguity with the app's own AnyCodable type.
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private typealias ProtoAnyCodable = ClawdbotProtocol.AnyCodable
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private enum ConnectChallengeError: Error {
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case timeout
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}
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public actor GatewayChannelActor {
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private let logger = Logger(subsystem: "com.clawdbot", category: "gateway")
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private var task: WebSocketTaskBox?
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private var pending: [String: CheckedContinuation<GatewayFrame, Error>] = [:]
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private var connected = false
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private var isConnecting = false
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private var connectWaiters: [CheckedContinuation<Void, Error>] = []
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private var url: URL
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private var token: String?
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private var password: String?
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private let session: WebSocketSessioning
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private var backoffMs: Double = 500
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private var shouldReconnect = true
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private var lastSeq: Int?
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private var lastTick: Date?
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private var tickIntervalMs: Double = 30000
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private let decoder = JSONDecoder()
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private let encoder = JSONEncoder()
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private let connectTimeoutSeconds: Double = 6
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private let connectChallengeTimeoutSeconds: Double = 0.75
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private var watchdogTask: Task<Void, Never>?
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private var tickTask: Task<Void, Never>?
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private let defaultRequestTimeoutMs: Double = 15000
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private let pushHandler: (@Sendable (GatewayPush) async -> Void)?
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private let connectOptions: GatewayConnectOptions?
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private let disconnectHandler: (@Sendable (String) async -> Void)?
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public init(
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url: URL,
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token: String?,
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password: String? = nil,
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session: WebSocketSessionBox? = nil,
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pushHandler: (@Sendable (GatewayPush) async -> Void)? = nil,
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connectOptions: GatewayConnectOptions? = nil,
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disconnectHandler: (@Sendable (String) async -> Void)? = nil)
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{
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self.url = url
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self.token = token
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self.password = password
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self.session = session?.session ?? URLSession(configuration: .default)
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self.pushHandler = pushHandler
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self.connectOptions = connectOptions
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self.disconnectHandler = disconnectHandler
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Task { [weak self] in
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await self?.startWatchdog()
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}
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}
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public func shutdown() async {
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self.shouldReconnect = false
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self.connected = false
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self.watchdogTask?.cancel()
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self.watchdogTask = nil
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self.tickTask?.cancel()
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self.tickTask = nil
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self.task?.cancel(with: .goingAway, reason: nil)
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self.task = nil
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await self.failPending(NSError(
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domain: "Gateway",
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code: 0,
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userInfo: [NSLocalizedDescriptionKey: "gateway channel shutdown"]))
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let waiters = self.connectWaiters
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self.connectWaiters.removeAll()
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for waiter in waiters {
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waiter.resume(throwing: NSError(
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domain: "Gateway",
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code: 0,
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userInfo: [NSLocalizedDescriptionKey: "gateway channel shutdown"]))
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}
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}
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private func startWatchdog() {
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self.watchdogTask?.cancel()
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self.watchdogTask = Task { [weak self] in
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guard let self else { return }
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await self.watchdogLoop()
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}
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}
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private func watchdogLoop() async {
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// Keep nudging reconnect in case exponential backoff stalls.
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while self.shouldReconnect {
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try? await Task.sleep(nanoseconds: 30 * 1_000_000_000) // 30s cadence
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guard self.shouldReconnect else { return }
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if self.connected { continue }
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do {
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try await self.connect()
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} catch {
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let wrapped = self.wrap(error, context: "gateway watchdog reconnect")
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self.logger.error("gateway watchdog reconnect failed \(wrapped.localizedDescription, privacy: .public)")
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}
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}
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}
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public func connect() async throws {
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if self.connected, self.task?.state == .running { return }
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if self.isConnecting {
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try await withCheckedThrowingContinuation { cont in
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self.connectWaiters.append(cont)
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}
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return
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}
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self.isConnecting = true
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defer { self.isConnecting = false }
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self.task?.cancel(with: .goingAway, reason: nil)
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self.task = self.session.makeWebSocketTask(url: self.url)
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self.task?.resume()
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do {
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try await AsyncTimeout.withTimeout(
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seconds: self.connectTimeoutSeconds,
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onTimeout: {
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NSError(
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domain: "Gateway",
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code: 1,
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userInfo: [NSLocalizedDescriptionKey: "connect timed out"])
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},
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operation: { try await self.sendConnect() })
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} catch {
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let wrapped = self.wrap(error, context: "connect to gateway @ \(self.url.absoluteString)")
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self.connected = false
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self.task?.cancel(with: .goingAway, reason: nil)
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await self.disconnectHandler?("connect failed: \(wrapped.localizedDescription)")
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let waiters = self.connectWaiters
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self.connectWaiters.removeAll()
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for waiter in waiters {
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waiter.resume(throwing: wrapped)
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}
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self.logger.error("gateway ws connect failed \(wrapped.localizedDescription, privacy: .public)")
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throw wrapped
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}
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self.listen()
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self.connected = true
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self.backoffMs = 500
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self.lastSeq = nil
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let waiters = self.connectWaiters
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self.connectWaiters.removeAll()
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for waiter in waiters {
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waiter.resume(returning: ())
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}
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}
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private func sendConnect() async throws {
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let platform = InstanceIdentity.platformString
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let primaryLocale = Locale.preferredLanguages.first ?? Locale.current.identifier
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let options = self.connectOptions ?? GatewayConnectOptions(
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role: "operator",
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scopes: ["operator.admin", "operator.approvals", "operator.pairing"],
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caps: [],
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commands: [],
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permissions: [:],
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clientId: "clawdbot-macos",
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clientMode: "ui",
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clientDisplayName: InstanceIdentity.displayName)
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let clientDisplayName = options.clientDisplayName ?? InstanceIdentity.displayName
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let clientId = options.clientId
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let clientMode = options.clientMode
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let reqId = UUID().uuidString
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var client: [String: ProtoAnyCodable] = [
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"id": ProtoAnyCodable(clientId),
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"displayName": ProtoAnyCodable(clientDisplayName),
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"version": ProtoAnyCodable(
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Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "dev"),
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"platform": ProtoAnyCodable(platform),
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"mode": ProtoAnyCodable(clientMode),
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"instanceId": ProtoAnyCodable(InstanceIdentity.instanceId),
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]
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client["deviceFamily"] = ProtoAnyCodable(InstanceIdentity.deviceFamily)
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if let model = InstanceIdentity.modelIdentifier {
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client["modelIdentifier"] = ProtoAnyCodable(model)
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}
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var params: [String: ProtoAnyCodable] = [
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"minProtocol": ProtoAnyCodable(GATEWAY_PROTOCOL_VERSION),
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"maxProtocol": ProtoAnyCodable(GATEWAY_PROTOCOL_VERSION),
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"client": ProtoAnyCodable(client),
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"caps": ProtoAnyCodable(options.caps),
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"locale": ProtoAnyCodable(primaryLocale),
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"userAgent": ProtoAnyCodable(ProcessInfo.processInfo.operatingSystemVersionString),
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"role": ProtoAnyCodable(options.role),
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"scopes": ProtoAnyCodable(options.scopes),
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]
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if !options.commands.isEmpty {
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params["commands"] = ProtoAnyCodable(options.commands)
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}
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if !options.permissions.isEmpty {
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params["permissions"] = ProtoAnyCodable(options.permissions)
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}
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if let token = self.token {
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params["auth"] = ProtoAnyCodable(["token": ProtoAnyCodable(token)])
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} else if let password = self.password {
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params["auth"] = ProtoAnyCodable(["password": ProtoAnyCodable(password)])
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}
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let identity = DeviceIdentityStore.loadOrCreate()
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let signedAtMs = Int(Date().timeIntervalSince1970 * 1000)
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let connectNonce = try await self.waitForConnectChallenge()
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let scopes = options.scopes.joined(separator: ",")
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var payloadParts = [
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connectNonce == nil ? "v1" : "v2",
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identity.deviceId,
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clientId,
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clientMode,
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options.role,
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scopes,
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String(signedAtMs),
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self.token ?? "",
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]
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if let connectNonce {
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payloadParts.append(connectNonce)
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}
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let payload = payloadParts.joined(separator: "|")
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if let signature = DeviceIdentityStore.signPayload(payload, identity: identity),
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let publicKey = DeviceIdentityStore.publicKeyBase64Url(identity) {
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var device: [String: ProtoAnyCodable] = [
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"id": ProtoAnyCodable(identity.deviceId),
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"publicKey": ProtoAnyCodable(publicKey),
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"signature": ProtoAnyCodable(signature),
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"signedAt": ProtoAnyCodable(signedAtMs),
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]
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if let connectNonce {
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device["nonce"] = ProtoAnyCodable(connectNonce)
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}
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params["device"] = ProtoAnyCodable(device)
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}
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let frame = RequestFrame(
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type: "req",
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id: reqId,
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method: "connect",
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params: ProtoAnyCodable(params))
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let data = try self.encoder.encode(frame)
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try await self.task?.send(.data(data))
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let response = try await self.waitForConnectResponse(reqId: reqId)
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try await self.handleConnectResponse(response)
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}
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private func handleConnectResponse(_ res: ResponseFrame) async throws {
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if res.ok == false {
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let msg = (res.error?["message"]?.value as? String) ?? "gateway connect failed"
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throw NSError(domain: "Gateway", code: 1008, userInfo: [NSLocalizedDescriptionKey: msg])
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}
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guard let payload = res.payload else {
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throw NSError(
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domain: "Gateway",
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code: 1,
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userInfo: [NSLocalizedDescriptionKey: "connect failed (missing payload)"])
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}
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let payloadData = try self.encoder.encode(payload)
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let ok = try decoder.decode(HelloOk.self, from: payloadData)
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if let tick = ok.policy["tickIntervalMs"]?.value as? Double {
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self.tickIntervalMs = tick
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} else if let tick = ok.policy["tickIntervalMs"]?.value as? Int {
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self.tickIntervalMs = Double(tick)
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}
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self.lastTick = Date()
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self.tickTask?.cancel()
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self.tickTask = Task { [weak self] in
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guard let self else { return }
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await self.watchTicks()
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}
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await self.pushHandler?(.snapshot(ok))
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}
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private func listen() {
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self.task?.receive { [weak self] result in
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guard let self else { return }
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switch result {
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case let .failure(err):
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Task { await self.handleReceiveFailure(err) }
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case let .success(msg):
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Task {
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await self.handle(msg)
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await self.listen()
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}
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}
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}
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}
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private func handleReceiveFailure(_ err: Error) async {
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let wrapped = self.wrap(err, context: "gateway receive")
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self.logger.error("gateway ws receive failed \(wrapped.localizedDescription, privacy: .public)")
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self.connected = false
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await self.disconnectHandler?("receive failed: \(wrapped.localizedDescription)")
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await self.failPending(wrapped)
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await self.scheduleReconnect()
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}
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private func handle(_ msg: URLSessionWebSocketTask.Message) async {
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let data: Data? = switch msg {
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case let .data(d): d
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case let .string(s): s.data(using: .utf8)
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@unknown default: nil
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}
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guard let data else { return }
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guard let frame = try? self.decoder.decode(GatewayFrame.self, from: data) else {
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self.logger.error("gateway decode failed")
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return
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}
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switch frame {
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case let .res(res):
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let id = res.id
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if let waiter = pending.removeValue(forKey: id) {
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waiter.resume(returning: .res(res))
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}
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case let .event(evt):
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if evt.event == "connect.challenge" { return }
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if let seq = evt.seq {
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if let last = lastSeq, seq > last + 1 {
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await self.pushHandler?(.seqGap(expected: last + 1, received: seq))
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}
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self.lastSeq = seq
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}
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if evt.event == "tick" { self.lastTick = Date() }
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await self.pushHandler?(.event(evt))
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default:
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break
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}
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}
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private func waitForConnectChallenge() async throws -> String? {
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guard let task = self.task else { return nil }
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do {
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return try await AsyncTimeout.withTimeout(
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seconds: self.connectChallengeTimeoutSeconds,
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onTimeout: { ConnectChallengeError.timeout },
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operation: { [weak self] in
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guard let self else { return nil }
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while true {
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let msg = try await task.receive()
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guard let data = self.decodeMessageData(msg) else { continue }
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guard let frame = try? self.decoder.decode(GatewayFrame.self, from: data) else { continue }
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if case let .event(evt) = frame, evt.event == "connect.challenge" {
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if let payload = evt.payload?.value as? [String: ProtoAnyCodable],
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let nonce = payload["nonce"]?.value as? String {
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return nonce
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}
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}
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}
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})
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} catch {
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if error is ConnectChallengeError { return nil }
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throw error
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}
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}
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private func waitForConnectResponse(reqId: String) async throws -> ResponseFrame {
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guard let task = self.task else {
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throw NSError(
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domain: "Gateway",
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code: 1,
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userInfo: [NSLocalizedDescriptionKey: "connect failed (no response)"])
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}
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while true {
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let msg = try await task.receive()
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guard let data = self.decodeMessageData(msg) else { continue }
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guard let frame = try? self.decoder.decode(GatewayFrame.self, from: data) else {
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throw NSError(
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domain: "Gateway",
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code: 1,
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userInfo: [NSLocalizedDescriptionKey: "connect failed (invalid response)"])
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}
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if case let .res(res) = frame, res.id == reqId {
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return res
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}
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}
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}
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private func decodeMessageData(_ msg: URLSessionWebSocketTask.Message) -> Data? {
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let data: Data? = switch msg {
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case let .data(data): data
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case let .string(text): text.data(using: .utf8)
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@unknown default: nil
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}
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return data
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}
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private func watchTicks() async {
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let tolerance = self.tickIntervalMs * 2
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while self.connected {
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try? await Task.sleep(nanoseconds: UInt64(tolerance * 1_000_000))
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guard self.connected else { return }
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if let last = self.lastTick {
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let delta = Date().timeIntervalSince(last) * 1000
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if delta > tolerance {
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self.logger.error("gateway tick missed; reconnecting")
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self.connected = false
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await self.failPending(
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NSError(
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domain: "Gateway",
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code: 4,
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userInfo: [NSLocalizedDescriptionKey: "gateway tick missed; reconnecting"]))
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await self.scheduleReconnect()
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return
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}
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}
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}
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}
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private func scheduleReconnect() async {
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guard self.shouldReconnect else { return }
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let delay = self.backoffMs / 1000
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self.backoffMs = min(self.backoffMs * 2, 30000)
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try? await Task.sleep(nanoseconds: UInt64(delay * 1_000_000_000))
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guard self.shouldReconnect else { return }
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do {
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try await self.connect()
|
|
} catch {
|
|
let wrapped = self.wrap(error, context: "gateway reconnect")
|
|
self.logger.error("gateway reconnect failed \(wrapped.localizedDescription, privacy: .public)")
|
|
await self.scheduleReconnect()
|
|
}
|
|
}
|
|
|
|
public func request(
|
|
method: String,
|
|
params: [String: AnyCodable]?,
|
|
timeoutMs: Double? = nil) async throws -> Data
|
|
{
|
|
do {
|
|
try await self.connect()
|
|
} catch {
|
|
throw self.wrap(error, context: "gateway connect")
|
|
}
|
|
let id = UUID().uuidString
|
|
let effectiveTimeout = timeoutMs ?? self.defaultRequestTimeoutMs
|
|
// Encode request using the generated models to avoid JSONSerialization/ObjC bridging pitfalls.
|
|
let paramsObject: ProtoAnyCodable? = params.map { entries in
|
|
let dict = entries.reduce(into: [String: ProtoAnyCodable]()) { dict, entry in
|
|
dict[entry.key] = ProtoAnyCodable(entry.value.value)
|
|
}
|
|
return ProtoAnyCodable(dict)
|
|
}
|
|
let frame = RequestFrame(
|
|
type: "req",
|
|
id: id,
|
|
method: method,
|
|
params: paramsObject)
|
|
let data = try self.encoder.encode(frame)
|
|
let response = try await withCheckedThrowingContinuation { (cont: CheckedContinuation<GatewayFrame, Error>) in
|
|
self.pending[id] = cont
|
|
Task { [weak self] in
|
|
guard let self else { return }
|
|
try? await Task.sleep(nanoseconds: UInt64(effectiveTimeout * 1_000_000))
|
|
await self.timeoutRequest(id: id, timeoutMs: effectiveTimeout)
|
|
}
|
|
Task {
|
|
do {
|
|
try await self.task?.send(.data(data))
|
|
} catch {
|
|
let wrapped = self.wrap(error, context: "gateway send \(method)")
|
|
let waiter = self.pending.removeValue(forKey: id)
|
|
// Treat send failures as a broken socket: mark disconnected and trigger reconnect.
|
|
self.connected = false
|
|
self.task?.cancel(with: .goingAway, reason: nil)
|
|
Task { [weak self] in
|
|
guard let self else { return }
|
|
await self.scheduleReconnect()
|
|
}
|
|
if let waiter { waiter.resume(throwing: wrapped) }
|
|
}
|
|
}
|
|
}
|
|
guard case let .res(res) = response else {
|
|
throw NSError(domain: "Gateway", code: 2, userInfo: [NSLocalizedDescriptionKey: "unexpected frame"])
|
|
}
|
|
if res.ok == false {
|
|
let code = res.error?["code"]?.value as? String
|
|
let msg = res.error?["message"]?.value as? String
|
|
let details: [String: AnyCodable] = (res.error ?? [:]).reduce(into: [:]) { acc, pair in
|
|
acc[pair.key] = AnyCodable(pair.value.value)
|
|
}
|
|
throw GatewayResponseError(method: method, code: code, message: msg, details: details)
|
|
}
|
|
if let payload = res.payload {
|
|
// Encode back to JSON with Swift's encoder to preserve types and avoid ObjC bridging exceptions.
|
|
return try self.encoder.encode(payload)
|
|
}
|
|
return Data() // Should not happen, but tolerate empty payloads.
|
|
}
|
|
|
|
// Wrap low-level URLSession/WebSocket errors with context so UI can surface them.
|
|
private func wrap(_ error: Error, context: String) -> Error {
|
|
if let urlError = error as? URLError {
|
|
let desc = urlError.localizedDescription.isEmpty ? "cancelled" : urlError.localizedDescription
|
|
return NSError(
|
|
domain: URLError.errorDomain,
|
|
code: urlError.errorCode,
|
|
userInfo: [NSLocalizedDescriptionKey: "\(context): \(desc)"])
|
|
}
|
|
let ns = error as NSError
|
|
let desc = ns.localizedDescription.isEmpty ? "unknown" : ns.localizedDescription
|
|
return NSError(domain: ns.domain, code: ns.code, userInfo: [NSLocalizedDescriptionKey: "\(context): \(desc)"])
|
|
}
|
|
|
|
private func failPending(_ error: Error) async {
|
|
let waiters = self.pending
|
|
self.pending.removeAll()
|
|
for (_, waiter) in waiters {
|
|
waiter.resume(throwing: error)
|
|
}
|
|
}
|
|
|
|
private func timeoutRequest(id: String, timeoutMs: Double) async {
|
|
guard let waiter = self.pending.removeValue(forKey: id) else { return }
|
|
let err = NSError(
|
|
domain: "Gateway",
|
|
code: 5,
|
|
userInfo: [NSLocalizedDescriptionKey: "gateway request timed out after \(Int(timeoutMs))ms"])
|
|
waiter.resume(throwing: err)
|
|
}
|
|
}
|
|
|
|
// Intentionally no `GatewayChannel` wrapper: the app should use the single shared `GatewayConnection`.
|