Swift 3.0 Alamofire 4.0 - Domain=NSURLErrorDomain Code=-999 “取消”答案

【问题标题】：Swift 3.0 Alamofire 4.0 - Domain=NSURLErrorDomain Code=-999 "cancelled"Swift 3.0 Alamofire 4.0 - Domain=NSURLErrorDomain Code=-999 “取消”
【发布时间】：2016-11-26 14:09:32
【问题描述】：

我正在尝试将 Alamofire（最新版本）与 Swift 3.0、iOS 10 和 xCode 8 一起使用。目前正在尝试进行后期通话。代码写在下面，我一直遇到同样的问题。请提供帮助，对此不胜感激。

private class func getDefaultHeaders() -> HTTPHeaders {
        let headers: HTTPHeaders = [
            "Connection" : "keep-alive",
            "token" : "0781d3957fd8da6ee35c4e3124d974a2999925274771234",
            "nonce" : "9b2436331ed908bb2f399568d2adbc4e",
            "uuid" : "uuid",
            "latitude" : "43.656781",
            "longitude" : "-79.380823",
            "Content-Type" : "application/json",
            "userTypeId" : "1",
            "userAgent" : "UserAgent",
            "Content-Length" : "0",
            "Host" : "localhost:8080",
            "User-Agent" : "iOS Example/1.0 (com.alamofire.iOS-Example; build:1; iOS 10.0.0) Alamofire/4.0.0"
        ]
        return headers
    }

func generateCustomSession() -> SessionManager {
    let headers = ServicesController.getDefaultHeaders()
    let configuration = URLSessionConfiguration.default
    configuration.httpAdditionalHeaders = headers
    let manager: SessionManager = SessionManager(configuration: configuration)

    return manager
}

func post(url: String, success:@escaping (JSON) -> Void, failure:@escaping (Error) -> Void) {
        generateCustomSession().request(
            url,
            method: .post,
            encoding: JSONEncoding.default)
            .validate(statusCode: 200..<300)
            .downloadProgress { (progress) -> Void in
                print("download progress: \(progress.fractionCompleted)")
            }
            .responseJSON { (response) -> Void in
                if #available(iOS 10.0, *) {
                    print(response.metrics)
                }

                debugPrint(response)

                if response.result.isSuccess {
                    let resJson = JSON(response.result.value!)
                    success(resJson)
                }
                if response.result.isFailure {
                    let error : Error = response.result.error!
                    failure(error)
                }
        }
    }

【问题讨论】：

标签： swift3 alamofire ios10

【解决方案1】：

如果可疑的 https 证书存在问题，可以由允许访问的用户修复，但这种情况不会发生，则可能会发生“取消”。

很可能根本原因是服务器使用的证书不够完善。

【讨论】：

除了告诉服务器修复您的证书问题之外，是否应该有解决此问题的方法。

【解决方案2】：

我找到了解决问题的方法。下面是帮助您取消身份验证质询的代码。我不推荐这个，这对于临时解决方案很有用。最好的办法仍然是完全验证身份验证质询。

    let manager: SessionManager = SessionManager(configuration: configuration, serverTrustPolicyManager: ServerTrustPolicyManager(policies: serverTrustPolicies))
    manager.delegate.sessionDidReceiveChallenge = { session, challenge in
            var disposition: URLSession.AuthChallengeDisposition = .cancelAuthenticationChallenge
            var credential: URLCredential?

            if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
                disposition = URLSession.AuthChallengeDisposition.useCredential
                credential = URLCredential(trust: challenge.protectionSpace.serverTrust!)
            } else {
                if challenge.previousFailureCount > 0 {
                    disposition = .cancelAuthenticationChallenge
                } else {
                    credential = manager.session.configuration.urlCredentialStorage?.defaultCredential(for: challenge.protectionSpace)
                    if credential != nil {
                        disposition = .useCredential
                    }
                }
            }

            return (disposition, credential)
    }


    return manager
}

【讨论】：