Alamofire 4 FAILURE: Error Domain=NSURLErrorDomain Code=-999 “cancelled”

[Lves]

When update to Alamofire4 and Swift3 ，request sometimes be cancled.

open override func requestJSON() -> SignalProducer<NetApiProtocol, NetError> {
        NetApiData.addApi(self)
        return SignalProducer { [unowned self] sink,disposable in
            let urlRequest = NetApiData.getURLRequest(self)
            let request = Alamofire.request(urlRequest)
            self.request = request
            self.indicator?.bindTask(request.task!)
            let timeBegin = Date()
            request.responseJSON { [weak self] response in
                guard let wself = self else { return }
                NetApiData.removeApi(wself)
                DDLogWarn("请求耗时: \(NSDate().timeIntervalSince(timeBegin).secondsToHHmmssString())")
                let transferedResponse = wself.transferResponseJSON(response.toNetApiResponse())
                switch transferedResponse.result {
                case .success:
                    DDLogInfo("请求成功: \(wself.url)")
                    if let value = transferedResponse.result.value {
                        DDLogVerbose("JSON: \(value)")
                        wself.response = response.toNetApiResponse()
                        wself.fillJSON(value)
                        sink.send(value: wself)
                        sink.sendCompleted()
                        return
                    }
                case .failure(let error):
                    if let statusCode = StatusCode(rawValue:error.code) {
                        switch(statusCode) {
                        case .canceled:
                            DDLogWarn("请求取消: \(wself.url)")
                            sink.sendInterrupted()
                            return
                        default:
                            break
                        }
                    }
                    DDLogError("请求失败: \(wself.url)")
                    DDLogError("\(error)")
                    let err = error is NetError ? error as! NetError : NetError(error: error)
                    err.response = transferedResponse.response
                    sink.send(error: err)
                }
            }
            disposable.add { [weak self] in
                guard let wself = self else { return }
                NetApiData.removeApi(wself)
            }
        }
    }

when i delete this line self.indicator?.bindTask(request.task!) ,it will be ok.
bindTask coder is:

open func bindTask(_ task: URLSessionTask, view: UIView?, text: String?){
        task.indicatorView = view
        task.indicatorText = text ?? ""
        let notificationCenter = NotificationCenter.default
        notificationCenter.removeObserver(self, name: Notification.Name.Task.DidResume, object: nil)
        notificationCenter.removeObserver(self, name: Notification.Name.Task.DidSuspend, object: nil)
        notificationCenter.removeObserver(self, name: Notification.Name.Task.DidCancel, object: nil)
        notificationCenter.removeObserver(self, name: Notification.Name.Task.DidComplete, object: nil)
        if task.state == .running {
            notificationCenter.addObserver(self, selector: #selector(TaskIndicator.task_resume), name: Notification.Name.Task.DidResume, object: nil)
            notificationCenter.addObserver(self, selector: #selector(TaskIndicator.task_suspend), name: Notification.Name.Task.DidSuspend, object: nil)
            notificationCenter.addObserver(self, selector: #selector(TaskIndicator.task_cancel), name: Notification.Name.Task.DidCancel, object: nil)
            notificationCenter.addObserver(self, selector: #selector(TaskIndicator.task_end), name: Notification.Name.Task.DidComplete, object: nil)
            var notify = Notification(name: Notification.Name(rawValue: ""), object: nil)
            notify.userInfo = [Notification.Key.Task: task]
            self.task_resume(notify: notify)
        } else {
            var notify = Notification(name: Notification.Name(rawValue: ""), object: nil)
            notify.userInfo = [Notification.Key.Task: task]
            self.task_end(notify: notify)
        }
    }

I call request in viewWillAppear,if I did not delete self.indicator?.bindTask(request.task!) , the first is ok , second is bad.I want the reason?

Async.main(after: 0.5) { [weak self] in self?.loadData() }
2.
loadData()

[cnoon]

Hi @Lves,

I'd suggest you open a question on Stack Overflow and tag alamofire. We use our GitHub project for bug reports and feature requests.

Best of luck! 🍻

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