import Alamofire

let parameters: Parameters = [
    "str_param": "str value",
    "num_param": 0,
    "nested": [
        "nested_param": "value"
    ]
]

Alamofire.request(url,
                  method: .post,
                  parameters: parameters,
                  encoding: JSONEncoding.default,
                  headers: headers)
    .authenticate(user: "user", password: "password")
    .responseJSON { response in

        if
            let json = response.result.value as? [String: Any],
            let prop1 = json["prop1"] as? String
        {
            debugPrint(prop1)
        }

        debugPrint(response)
}

func appendMultipartFormData(multipartFormData: MultipartFormData, element: [String: Any]) {
switch element["value"] {
case let image as UIImage:
    var imageData: Data
    var mimeType: String
    if element["extension"] as! String == "jpg" {
        print(element["extension"] as! String)
        imageData = UIImageJPEGRepresentation(image, 1.0)!
        mimeType = "jpeg"
    } else {
        imageData = UIImagePNGRepresentation(image)!
        mimeType = "png"
    }
    multipartFormData.append(
        imageData,
        withName: element["key"] as! String,
        fileName: element["name"] as! String,
        mimeType: mimeType
    )
default:
    let value = element["value"] as! String
    multipartFormData.append((value.data(using: .utf8))!, withName: element["key"] as! String)
    break
}

func uploaldMultipartProcess(upload: UploadRequest, completeNotificationName: NSNotification.Name) {
upload
    .uploadProgress(closure: { (progress) in
        print("Upload Progress: (progress.fractionCompleted)")
    })
    .validate(statusCode: 200..<300)
    .validate(contentType: ["application/json"])
    .responseJSON { (response: DataResponse<Any>) in
        let statusCode = response.response?.statusCode
        print("Success: (response.result.isSuccess)")
        print("Status code: (String(describing: statusCode))")
}