Ios HTTP post使用JustHTTP和Alamofire发送了两次

我正在尝试使用iOS 9中的Swift 2通过HTTP上传（到Windows IIS服务器）一个图像和表单参数，出于某种原因，它会发送两次帖子，尽管我只需单击一个按钮即可调用函数1

我已经检查过按钮没有多次启动

我正在用basic auth发布到HTTPS（我用HTTP尝试了同样的结果）。它是使用JustHttp（版本0.3）和Alamofire 3实现的

通过观察Alamofire（和JustHTTP）中的上传进度，我可以看到它更新了

totalBytesExpectedToWrite

，然后在上传过程中，

totalBytesExpectedToWrite

的值加倍

我试着调试JustHTTP和Alamofire，以了解为什么会发生这种情况，但找不到发生的地方

我使用的JustHttp代码是：

Just.post(
        "https://my.url.com",
        auth:("xxxxxxxx", "xxxxxxxxx"),
        timeout: 20,
        data:["Name": tfName.text! as AnyObject,
        "Email": tfEmail.text! as AnyObject,
        files:[
            "file":HTTPFile.Data("photo.jpg", imagedata!, nil)
        ],
        asyncProgressHandler: {(p) in
            print(p.type) // either .Upload or .Download
            if (p.type == ProgressType.Upload)
            {
                dispatch_async(dispatch_get_main_queue()) {
                    // update some UI
                    self.textView.titleLabel.text = "Sending Entry...\(Int(p.percent*100))%"
                }
            }
        },
        asyncCompletionHandler: {(r) in
        dispatch_async(dispatch_get_main_queue()) {
            print(r.statusCode)
        }
    })

Alamofire代码为：

Alamofire.upload(Method.POST, "https://the.url.com", multipartFormData: { multipartFormData in
        multipartFormData.appendBodyPart(data: imagedata!, name: "file", fileName: "photo.jpg", mimeType: "image/png")
        multipartFormData.appendBodyPart(data: "My Name".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name: "Name")
        multipartFormData.appendBodyPart(data: "My Email address".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!, name: "Email")
        },
        encodingCompletion: { encodingResult in
            print("encoding done")
            switch encodingResult {
            case .Success(let upload, _, _):
                upload.authenticate(user: "xxxxxx", password: "xxxxxxxxxx")
                    .progress { bytesWritten, totalBytesWritten, totalBytesExpectedToWrite in
                        print("a: \(bytesWritten) b: \(totalBytesWritten) c: \(totalBytesExpectedToWrite)")

                }
                upload.responseString { request, response, responseBody in
                    print(request)
                    print(response!.statusCode)
                    switch responseBody {
                    case Result.Success(let responseValue):
                        print(responseValue)

                    case Result.Failure(_, let error as NSError):
                        print(error)

                    default: break

                    }
                }
            case .Failure(let encodingError):
                print(encodingError)
            }
    })

更新：

---

我现在已经在没有身份验证的情况下使用Alamofire进行了尝试，并且它按照预期工作，即只发送整个请求一次。

好的，我已经解决了这个问题。除了auth参数（在Just和Alamofire中）之外，我还需要添加到以下标题中。我从Alamofire文档中获得了代码，但没有意识到我需要添加标题并包含auth属性

let user = "xxxxxxx"
let password = "xxxxxxx"
let credentialData = "\(user):\(password)".dataUsingEncoding(NSUTF8StringEncoding)!
let base64Credentials = credentialData.base64EncodedStringWithOptions([])
let headers = ["Authorization": "Basic \(base64Credentials)"]

那么对于Alamofire：

Alamofire.upload(Method.POST, "https://my.url.com", headers: headers, multipartFormData: [...]

对于JustHttp：

Just.post("https://my.url.com",
        auth:(user, password),
        headers: headers,
        [...]

为完整起见，远程Web服务器是运行Asp.Net C#MVC 5的IIS 7.5，具有以下身份验证操作筛选器：

public class BasicAuthenticationAttribute : ActionFilterAttribute
{
    public string BasicRealm { get; set; }
    protected string Username { get; set; }
    protected string Password { get; set; }

    public BasicAuthenticationAttribute(string username, string password)
    {
        this.Username = username;
        this.Password = password;
    }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var req = filterContext.HttpContext.Request;
        var auth = req.Headers["Authorization"];
        if (!String.IsNullOrEmpty(auth))
        {
            var cred = System.Text.ASCIIEncoding.ASCII.GetString(Convert.FromBase64String(auth.Substring(6))).Split(':');
            var user = new { Name = cred[0], Pass = cred[1] };
            if (user.Name == Username && user.Pass == Password) return;
        }
        var res = filterContext.HttpContext.Response;
        res.StatusCode = 401;
        res.AddHeader("WWW-Authenticate", String.Format("Basic realm=\"{0}\"", BasicRealm ?? "content.imaginecruising.co.uk"));
        res.End();
    }
}

C#MVC使用情况：

[BasicAuthenticationAttribute("myusername", "mypassword", BasicRealm = "my.domain.com")]
public ActionResult MyAction()
{

---

我对基本身份验证也有同样的问题，谢谢你的回答！