ios - 使用 JustHTTP 和 Alamofire 发送两次 HTTP post

Question

我正在尝试使用 iOS 9 中的 Swift 2 HTTP 上传(到 Windows IIS 服务器)图像和表单参数，由于某种原因它发送了两次帖子，即使我只是在按钮上调用函数 one点击。

我已检查该按钮未触发超过一次。

我正在使用基本身份验证发布到 HTTPS(我已尝试使用 HTTP，结果相同)。它正在使用 JustHttp(版本 0.3)和 Alamofire 3 发生。

在 Alamofire(和 JustHTTP)中观察上传进度，我可以看到它更新了 totalBytesExpectedToWrite，然后在上传的某个时刻，totalBytesExpectedToWrite 的值翻了一番。

我已经尝试调试 JustHTTP 和 Alamofire 以了解发生这种情况的原因，但无法找到它发生的位置。

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 代码是:

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，它按预期工作，即只发送一次整个请求。

Answer 1

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 header 中。我从 Alamofire 文档中获取了代码，但没有意识到我需要添加 header 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)"]

然后对于 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,
        [...]

为了完整起见，远程网络服务器是运行 Asp.Net C# MVC 5 的 IIS 7.5，具有以下 Auth 操作过滤器:

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 用法:

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