如何使用RxAlamofire上传文件？

Question

您知道如何使用RxAlamofire上传multipartFormdata吗？ 现在我正在使用此解决方案，这只是一个包装好的Alamofire请求，可能还有一些更优雅的方法吗？

func uploadImage(image: UIImage, url: String) ->  Observable<String>{
    return Observable<String>.create({ observer in
        let parameters: [String:String] = [:]
        let headers =  ["x-auth-token": "7tw8t78twet"] 
        Alamofire.upload(multipartFormData: { multipartFormData in
            if let imageData = UIImageJPEGRepresentation(image, 0.8) {
                multipartFormData.append(imageData, withName: "file", fileName: "file.jpg", mimeType: "image/jpg")
            }

            for (key, value) in parameters {
                multipartFormData.append((value.data(using: .utf8))!, withName: key)
            }}, to: url, method: .post, headers: headers,
                encodingCompletion: { encodingResult in
                    switch encodingResult {
                    case .success(let upload, _, _):
                        upload.responseJSON { [weak self] response in
                            guard self != nil else { return }

                            guard response.result.error == nil else {
                                observer.onError(response.result.error!)
                                return
                            }
                            if let value: Any = response.result.value {
                                observer.onNext(JSON(value)["path"].stringValue)
                            }
                            observer.onCompleted()
                        }
                    case .failure(let encodingError):
                        observer.onError(encodingError)
                    }
        })
        return Disposables.create();
    })
}