Question

我在新升级的Swift 2.0项目中一个接一个地执行以下两个调用。

let session = NSURLSession.sharedSession()
   authRequest.HTTPMethod = "POST"
   authRequest.HTTPBody = authData
   authRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
   authRequest.addValue("close", forHTTPHeaderField: "Connection")
   authRequest.addValue("application/json", forHTTPHeaderField: "Accept")
   let authTask = session.dataTaskWithRequest(authRequest, completionHandler: { (data : NSData?, response : NSURLResponse? , error : NSError?) -> Void in
       print("Response: \(response)")
       print("Error: \(error)")
       let strData = NSString(data: data!, encoding: NSUTF8StringEncoding)
       print("Body: \(strData)")
       if let httpResponse = response as? NSHTTPURLResponse
       {
           if 200 ... 299 ~= httpResponse.statusCode
           {
               do
               {
               result = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableLeaves) as! Dictionary
               credentials.ClientId = (result["client_id"] as String?)!
               credentials.ClientSecret = (result["client_secret"] as String?)!
               credentials.Username = userDetail.Username
               credentials.Password = userDetail.Password
                   completionHandler(result: true)
                                }
               catch {

               }
           }
           else
           {
               self.RemoveInvalidUserCredentials()
               completionHandler(result: false)
           }

       }

       })
       authTask.resume()

其次是：

let session = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration())
   session.configuration.URLCache = nil
   session.configuration.HTTPMaximumConnectionsPerHost = 1
   tokenRequest.HTTPBody = tokenData
   tokenRequest.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
   tokenRequest.addValue("close", forHTTPHeaderField: "Connection")
   tokenRequest.addValue("Basic " + (credentials.encodedClientIdAndSecret() as String), forHTTPHeaderField: "Authorization")
   let tokenTask = session.dataTaskWithRequest(tokenRequest, completionHandler: {(data : NSData?, response : NSURLResponse? , error : NSError?) -> Void in
       print("Response: \(response)")
       print("Error: \(error)")
       let strData = NSString(data: data!, encoding: NSUTF8StringEncoding)
       print("Body: \(strData)")
       if let httpResponse = response as? NSHTTPURLResponse {
           if 200 ... 299 ~= httpResponse.statusCode
           {
               do
               {
               result = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableLeaves) as! Dictionary
               credentials.TokenType = (result["token_type"] as! String?)!
               credentials.Token = (result["access_token"] as! String?)!
               completionHandler(result: true)
               }
               catch{}
           }
       }
   })
   tokenTask.resume()

第一个代码块正确执行并返回以下内容：

Response: Optional(<NSHTTPURLResponse: 0x14ffe3e60> { URL: <URL>/authorize } { status code: 200, headers {
"Cache-Control" = "no-cache";
"Content-Length" = 115;
"Content-Type" = "application/json; charset=utf-8";
Date = "Tue, 29 Sep 2015 14:17:52 GMT";
Expires = "-1";
Pragma = "no-cache";
Server = "Microsoft-IIS/7.5";
"Set-Cookie" = ".AspNet.ApplicationCookie=E98BMJ5l56psnnJZRy2fyhRTWVYqw4aJsFqPeV1ktkJGi5_frTJ9-8pbp28TcDAn9ISFj_LqwFwOV7WhP1mfTVPktTGTs2Dr5-hvmnISxFVRc1Rg9CcYf3p-Cbn1w6qOEyuXco9PCmCnlsf54KPuSY6Z7FEcUgOyg2nq5oDyamfB_Y4b1dI-7cIZ3LB6ehoI50rIbc2ca7L7f73H1rhbsmuLRarBYsYehSRHRuKs9ec5-XuN0P1W6yqiQ3OOJMayPmmbi6y4uIhBUu0zoRC2v3k9usmRjubxGy2hqf6n0baTOIDokav0wQq_smR9qDA6nNh09YTS1Mzvf0iQPS2YJa7QrnERlNSixDROhkQVLC8hc3GV8jc9_7iGUhJzLgeVzhnjnVeB7Z311QLcXxGonEzzcWAzPu29tm2LkZgdte4J0kQHc-iTiNjSbgBqV2zVH9v_0JHtZCFGdSxSGptXGfsPr5O9M-EyVX2UNXxIsVI-hfv3p8-_igV96phbWsvWyqyYhVMQ8v61vHxfO2CFIQ; path=/; secure; HttpOnly";
"X-Powered-By" = "ASP.NET";

然而第二个有这个错误：

错误域= NSURLErrorDomain代码= -1005＆＃34;网络连接丢失。＆＃34; UserInfo = {NSUnderlyingError = 0x14ffe3cc0 {错误域= kCFErrorDomainCFNetwork代码= -1005＆＃34;（null）＆＃34; UserInfo = {_ kCFStreamErrorCodeKey = -4，_kCFStreamErrorDomainKey = 4}}，NSErrorFailingURLStringKey = https://test.acumentive.com/tagmanager/api/v1/tokens，NSErrorFailingURLKey = https://test.acumentive.com/tagmanager/api/v1/tokens，_ kCFStreamErrorDomainKey = 4，_kCFStreamErrorCodeKey = -4，NSLocalizedDescription =网络连接丢失。}

我无法访问服务器并尝试过不同的会话和相同的共享会话来发送请求。

有什么想法吗？

Answer 1

使用NSURLConnection而不是NSURLSession解决了该问题。由于会话缓存了以前的连接，它似乎正在发生。

Answer 2

这就是错误1005的全部内容 - 您无法访问服务器。当您向服务器发送请求时，会发生以下两种情况之一：您可以访问服务器并返回状态代码，或者您的设备从未设法与服务器通信，因此服务器无法为您提供状态代码。相反，你得到一个错误，通常在＃1000左右。

这个很少见，这意味着您的设备开始与服务器通信然后丢失连接（当您下载多兆字节文件时更常见）。想象一下有人从你的Mac上拔出网线，或者想象你在向服务器发出请求的过程中，用iPad走出WiFi系列。

我建议您将手机更改为“飞机”模式并查看会发生什么 - 每个请求都会出现类似错误，您应该测试一下您的应用程序是否能够很好地存活。当您关闭“飞机”模式时，它还应恢复到完整功能。

NSURLDomainError 1005＆＃34;网络连接丢失＆＃34;

2 个答案: