Gateway: finalize WS control plane
This commit is contained in:
Peter Steinberger
221
apps/macos/Sources/Clawdis/GatewayChannel.swift
Normal file
221
apps/macos/Sources/Clawdis/GatewayChannel.swift
Normal file
@@ -0,0 +1,221 @@
|
||||
import Foundation
|
||||
import OSLog
|
||||
|
||||
struct GatewayEvent: Codable {
|
||||
let type: String
|
||||
let event: String?
|
||||
let payload: AnyCodable?
|
||||
let seq: Int?
|
||||
}
|
||||
|
||||
extension Notification.Name {
|
||||
static let gatewaySnapshot = Notification.Name("clawdis.gateway.snapshot")
|
||||
static let gatewayEvent = Notification.Name("clawdis.gateway.event")
|
||||
static let gatewaySeqGap = Notification.Name("clawdis.gateway.seqgap")
|
||||
}
|
||||
|
||||
private actor GatewayChannelActor {
|
||||
private let logger = Logger(subsystem: "com.steipete.clawdis", category: "gateway")
|
||||
private var task: URLSessionWebSocketTask?
|
||||
private var pending: [String: CheckedContinuation<Data, Error>] = [:]
|
||||
private var connected = false
|
||||
private var url: URL
|
||||
private var token: String?
|
||||
private let session = URLSession(configuration: .default)
|
||||
private var backoffMs: Double = 500
|
||||
private var shouldReconnect = true
|
||||
private var lastSeq: Int?
|
||||
|
||||
init(url: URL, token: String?) {
|
||||
self.url = url
|
||||
self.token = token
|
||||
}
|
||||
|
||||
func connect() async throws {
|
||||
if connected, task?.state == .running { return }
|
||||
task?.cancel(with: .goingAway, reason: nil)
|
||||
task = session.webSocketTask(with: url)
|
||||
task?.resume()
|
||||
try await sendHello()
|
||||
listen()
|
||||
connected = true
|
||||
backoffMs = 500
|
||||
lastSeq = nil
|
||||
}
|
||||
|
||||
private func sendHello() async throws {
|
||||
let hello: [String: Any] = [
|
||||
"type": "hello",
|
||||
"minProtocol": 1,
|
||||
"maxProtocol": 1,
|
||||
"client": [
|
||||
"name": "clawdis-mac",
|
||||
"version": Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "dev",
|
||||
"platform": "macos",
|
||||
"mode": "app",
|
||||
"instanceId": Host.current().localizedName ?? UUID().uuidString,
|
||||
],
|
||||
"caps": [],
|
||||
"auth": token != nil ? ["token": token!] : [:],
|
||||
]
|
||||
let data = try JSONSerialization.data(withJSONObject: hello)
|
||||
try await task?.send(.data(data))
|
||||
// wait for hello-ok
|
||||
if let msg = try await task?.receive() {
|
||||
if try await handleHelloResponse(msg) { return }
|
||||
}
|
||||
throw NSError(domain: "Gateway", code: 1, userInfo: [NSLocalizedDescriptionKey: "hello failed"])
|
||||
}
|
||||
|
||||
private func handleHelloResponse(_ msg: URLSessionWebSocketTask.Message) async throws -> Bool {
|
||||
let data: Data?
|
||||
switch msg {
|
||||
case .data(let d): data = d
|
||||
case .string(let s): data = s.data(using: .utf8)
|
||||
@unknown default: data = nil
|
||||
}
|
||||
guard let data else { return false }
|
||||
guard let obj = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
|
||||
let type = obj["type"] as? String else { return false }
|
||||
if type == "hello-ok" {
|
||||
NotificationCenter.default.post(name: .gatewaySnapshot, object: nil, userInfo: obj)
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
private func listen() {
|
||||
task?.receive { [weak self] result in
|
||||
guard let self else { return }
|
||||
switch result {
|
||||
case .failure(let err):
|
||||
self.logger.error("gateway ws receive failed \(err.localizedDescription, privacy: .public)")
|
||||
self.connected = false
|
||||
self.scheduleReconnect()
|
||||
case .success(let msg):
|
||||
Task { await self.handle(msg) }
|
||||
self.listen()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private func handle(_ msg: URLSessionWebSocketTask.Message) async {
|
||||
let data: Data?
|
||||
switch msg {
|
||||
case .data(let d): data = d
|
||||
case .string(let s): data = s.data(using: .utf8)
|
||||
@unknown default: data = nil
|
||||
}
|
||||
guard let data else { return }
|
||||
guard let obj = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
|
||||
let type = obj["type"] as? String else { return }
|
||||
switch type {
|
||||
case "res":
|
||||
if let id = obj["id"] as? String, let waiter = pending.removeValue(forKey: id) {
|
||||
waiter.resume(returning: data)
|
||||
}
|
||||
case "event":
|
||||
if let seq = obj["seq"] as? Int {
|
||||
if let last = lastSeq, seq > last + 1 {
|
||||
NotificationCenter.default.post(
|
||||
name: .gatewaySeqGap,
|
||||
object: nil,
|
||||
userInfo: ["expected": last + 1, "received": seq]
|
||||
)
|
||||
}
|
||||
lastSeq = seq
|
||||
}
|
||||
NotificationCenter.default.post(name: .gatewayEvent, object: nil, userInfo: obj)
|
||||
case "hello-ok":
|
||||
NotificationCenter.default.post(name: .gatewaySnapshot, object: nil, userInfo: obj)
|
||||
default:
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
private func scheduleReconnect() {
|
||||
guard shouldReconnect else { return }
|
||||
let delay = backoffMs / 1000
|
||||
backoffMs = min(backoffMs * 2, 30_000)
|
||||
Task.detached { [weak self] in
|
||||
try? await Task.sleep(nanoseconds: UInt64(delay * 1_000_000_000))
|
||||
guard let self else { return }
|
||||
do {
|
||||
try await self.connect()
|
||||
} catch {
|
||||
self.logger.error("gateway reconnect failed \(error.localizedDescription, privacy: .public)")
|
||||
self.scheduleReconnect()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func request(method: String, params: [String: Any]?) async throws -> Data {
|
||||
try await connect()
|
||||
let id = UUID().uuidString
|
||||
let frame: [String: Any] = [
|
||||
"type": "req",
|
||||
"id": id,
|
||||
"method": method,
|
||||
"params": params ?? [:],
|
||||
]
|
||||
let data = try JSONSerialization.data(withJSONObject: frame)
|
||||
let response = try await withCheckedThrowingContinuation { (cont: CheckedContinuation<Data, Error>) in
|
||||
pending[id] = cont
|
||||
Task {
|
||||
do {
|
||||
try await task?.send(.data(data))
|
||||
} catch {
|
||||
pending.removeValue(forKey: id)
|
||||
cont.resume(throwing: error)
|
||||
}
|
||||
}
|
||||
}
|
||||
return response
|
||||
}
|
||||
}
|
||||
|
||||
actor GatewayChannel {
|
||||
private var inner: GatewayChannelActor?
|
||||
|
||||
func configure(url: URL, token: String?) {
|
||||
inner = GatewayChannelActor(url: url, token: token)
|
||||
}
|
||||
|
||||
func request(method: String, params: [String: Any]?) async throws -> Data {
|
||||
guard let inner else {
|
||||
throw NSError(domain: "Gateway", code: 0, userInfo: [NSLocalizedDescriptionKey: "not configured"])
|
||||
}
|
||||
return try await inner.request(method: method, params: params)
|
||||
}
|
||||
}
|
||||
|
||||
struct AnyCodable: Codable {
|
||||
let value: Any
|
||||
init(_ value: Any) { self.value = value }
|
||||
init(from decoder: Decoder) throws {
|
||||
let container = try decoder.singleValueContainer()
|
||||
if let intVal = try? container.decode(Int.self) { self.value = intVal; return }
|
||||
if let doubleVal = try? container.decode(Double.self) { self.value = doubleVal; return }
|
||||
if let boolVal = try? container.decode(Bool.self) { self.value = boolVal; return }
|
||||
if let stringVal = try? container.decode(String.self) { self.value = stringVal; return }
|
||||
if container.decodeNil() { self.value = NSNull(); return }
|
||||
if let dict = try? container.decode([String: AnyCodable].self) { self.value = dict; return }
|
||||
if let array = try? container.decode([AnyCodable].self) { self.value = array; return }
|
||||
throw DecodingError.dataCorruptedError(in: container, debugDescription: "Unsupported type")
|
||||
}
|
||||
func encode(to encoder: Encoder) throws {
|
||||
var container = encoder.singleValueContainer()
|
||||
switch self.value {
|
||||
case let intVal as Int: try container.encode(intVal)
|
||||
case let doubleVal as Double: try container.encode(doubleVal)
|
||||
case let boolVal as Bool: try container.encode(boolVal)
|
||||
case let stringVal as String: try container.encode(stringVal)
|
||||
case is NSNull: try container.encodeNil()
|
||||
case let dict as [String: AnyCodable]: try container.encode(dict)
|
||||
case let array as [AnyCodable]: try container.encode(array)
|
||||
default:
|
||||
let ctx = EncodingError.Context(codingPath: encoder.codingPath, debugDescription: "Unsupported type")
|
||||
throw EncodingError.invalidValue(self.value, ctx)
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user