Swift - 用於Windows身份驗證的NSURLSession

Question

我在這裏有這個類，裏面的類是一種方法，我試圖對需要Windows身份驗證用戶名和密碼的API執行NSURLSession。我按照這裏的教程https://gist.github.com/n8armstrong/5c5c828f1b82b0315e24

以及與此想出了：

let webservice = "https://api.com" 

let config = NSURLSessionConfiguration.defaultSessionConfiguration() 
let urlSession = NSURLSession(configuration: config) 

class WebService: NSObject { 

    func loginUser(username: String, password: String) -> Bool { 

     let userPasswordString = "username@domain.com:Password" 
     let userPasswordData = userPasswordString.dataUsingEncoding(NSUTF8StringEncoding) 
     let base64EncodedCredential = userPasswordData!.base64EncodedStringWithOptions([]) 
     let authString = "Basic \(base64EncodedCredential)" 

     config.HTTPAdditionalHeaders = ["Authorization" : authString] 

     let requestString = NSString(format:"%@", webservice) as String 
     let url: NSURL! = NSURL(string: requestString) 

     let task = urlSession.dataTaskWithURL(url) { 
      (let data, let response, let error) in 
      if (response as? NSHTTPURLResponse) != nil { 
       let dataString = NSString(data: data!, encoding: NSUTF8StringEncoding) 
       print(dataString) 
      } 
     } 

     task.resume() 

     return true 

    } 

} 

但是當我運行此我得到一個401錯誤：401 - 未經授權：訪問由於憑據無效被拒絕。

我已經確認API的URL是正確的。與用戶名和密碼相同。我究竟做錯了什麼？

Answer 1

我能夠這樣做，以解決這個問題如下：

var credential: NSURLCredential! 

    func loginUser(username: String, password: String) -> Bool { 

     let configuration = NSURLSessionConfiguration.defaultSessionConfiguration() 
     let session = NSURLSession(configuration: configuration, delegate: self, delegateQueue: nil) 

     credential = NSURLCredential(user:username, password:password, persistence: .ForSession) 

     let requestString = NSString(format:"%@", webservice) as String 
     let url: NSURL! = NSURL(string: requestString) 

     let task = session.dataTaskWithURL(url, completionHandler: { 
      data, response, error in 

      dispatch_async(dispatch_get_main_queue(), 
      { 

       if(error == nil) 
       { 
        print("Yay!") 
       } 
       else 
       { 
        print("Naw!") 
       } 

      }) 

     }) 

     task.resume() 

     return true 

    } 

，然後加入NSURLSessionDelegate方法：

func URLSession(session: NSURLSession, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void) { 

     if challenge.previousFailureCount > 0 
     { 
      completionHandler(NSURLSessionAuthChallengeDisposition.CancelAuthenticationChallenge, nil) 
     } 
     else 
     { 
      completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, NSURLCredential(forTrust:challenge.protectionSpace.serverTrust!)) 
     } 

    } 

    func URLSession(session: NSURLSession, task: NSURLSessionTask, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void) { 

     completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential,credential) 

    }