Swift 4 Alamofire 分段上传不起作用

Question

我正在使用 alamofire 4.7 和 swift 4

我需要上传图片和json到服务器。

我正在使用下面的代码上传结果失败，但数据正在插入服务器但没有得到响应，显示一些类似这样的序列化错误

▿ result : FAILURE: responseSerializationFailed(Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.}))
    ▿ failure : AFError
      ▿ responseSerializationFailed : ResponseSerializationFailureReason
  ▿ timeline : Timeline: { "Request Start Time": 548835779.066, "Initial Response Time": 548835779.074, "Request Completed Time": 548835779.127, "Serialization Completed Time": 548835779.127, "Latency": 0.008 secs, "Request Duration": 0.061 secs, "Serialization Duration": 0.000 secs, "Total Duration": 0.061 secs }
    - requestStartTime : 548835779.06617701
    - initialResponseTime : 548835779.07390201
    - requestCompletedTime : 548835779.12704694
    - serializationCompletedTime : 548835779.12748504
    - latency : 0.0077250003814697266
    - requestDuration : 0.060869932174682617
    - serializationDuration : 0.00043809413909912109
    - totalDuration : 0.061308026313781738
  ▿ _metrics : Optional<AnyObject>

================================================ ===================

        let auth : String = MitraModal.sharedInstance().getBasicAuthenticationString()
    let headers = ["Authorization": auth, "Content-type": "multipart/form-data"]

    Alamofire.upload(multipartFormData: { (multipartFormData) in

        multipartFormData.append("\(parameters)".data(using: String.Encoding.utf8)!, withName: "data" as String)

        if (!imageArray.isEmpty) {

            for item in imageArray {
                multipartFormData.append(item!, withName: "file", fileName: "image.png", mimeType: "image/png")
            }
        }

    }, usingThreshold: UInt64.init(), to: url, method: .post, headers: headers) { (result) in
        switch result{
        case .success(let upload, _, _):
            upload.responseJSON { response in

                if let JSON = response.result.value
                {
                    print("JSON: \(JSON)")
                    onCompletion?(JSON as? JSON)

                    print("Successfully uploaded")
                }

                if let err = response.error {
                    onError?(err)
                    return
                }
                onCompletion?(nil)
            }
        case .failure(let error):
            print("Error in upload: \(error.localizedDescription)")
            onError?(error)
        }
    }
}

有人帮忙吗？

Answer 1

由于我是新手，但前几天上传图片时遇到同样的问题，您必须在服务器端使用 file 接受图片，因为您的图片标签包含 withName: "文件" .

func AlamofireUploadImages(){

    let url : String = URL_IP+"/ZameenServer/api/addNewProperty.php"
    for img in HOUSEImages{
        let data  = UIImageJPEGRepresentation(img, 0.2)!
        ImagesData.append(data)
    }

    let parameters = [
        "userId"                : "5",
        "unit"                  : "6789"
    ] //Optional for extra parameter

    Alamofire.upload(multipartFormData: { multipartFormData in
        for imageData in self.ImagesData {
            multipartFormData.append(imageData, withName: "file[]", fileName: self.randomString(length: 5)+".jpeg", mimeType: "image/jpeg")
        }
        for (key, value) in parameters {
            multipartFormData.append((value?.data(using: String.Encoding.utf8)!)!, withName: key)
        } //Optional for extra parameters
    },
                     to:url)
    { (result) in

        switch result {
        case .success(let upload, _, _):

            upload.uploadProgress(closure: { (progress) in
                print("Upload Progress: \(progress.fractionCompleted)")
            })

            upload.responseJSON
                {
                    response in
                    print("Response :\(response.result.value)")
            }

        case .failure(let encodingError):
            print("no Error :\(encodingError)")
        }
    }

}

注意：由于我正在上传图片数组，因此上传多张图片使用 withName: "file[]" 或单张图片使用 withName: “文件”

也许对你有帮助。

谢谢

Answer 2

   let url = BaseViewController.API_URL + "uploads"
    let image = info[UIImagePickerControllerEditedImage] as? UIImage
    let imgData = UIImageJPEGRepresentation(image!, 0.2)!

    let parameters = [
                            "user_id" : UserDefaults.standard.value(forKey: "userId")!
    ]

    Alamofire.upload(multipartFormData: { multipartFormData in
        multipartFormData.append(imgData, withName: "uload_data",fileName: "file.jpg", mimeType: "image/jpg")
        for (key, value) in parameters {
            multipartFormData.append((value as AnyObject).data(using: String.Encoding.utf8.rawValue)!, withName: key)
        } //Optional for extra parameters
    },
                     to:url)
    { (result) in
        switch result {
        case .success(let upload, _, _):

            upload.uploadProgress(closure: { (progress) in
                print("Upload Progress: \(progress.fractionCompleted)")
            })

            upload.responseJSON { response in

                self.objHudHide()
                print(response.result.value)

                let jsonDict : NSDictionary = response.result.value as! NSDictionary

                print(jsonDict)
                if  jsonDict["status"] as! String == "Success"
                {


                    let detailDict : Dictionary = jsonDict["detail"] as! Dictionary<String,Any>

                    if let getTotalPrice = detailDict["total_price"]
                    {
                        self.lblTotalPrice.text = "$ \(getTotalPrice) + Free Shipping"
                    }

                    if  let getTotalSize = detailDict["total_upload_size"]
                    {
                        self.lblTotalSize.text = "Total Size : \(getTotalSize)"

                    }
                }
               else
                {

                let alertViewController = UIAlertController(title: NSLocalizedString("Alert!", comment: ""), message:"Something Went wrong please try again." , preferredStyle: .alert)
                let okAction = UIAlertAction(title: NSLocalizedString("Ok", comment: ""), style: .default) { (action) -> Void in

                }
                alertViewController.addAction(okAction)
                self.present(alertViewController, animated: true, completion: nil)


        }
            }

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

Answer 3

我也遇到了类似的问题。这可能会导致几个原因。在我的情况下，这是 POST 请求的参数键错误。当您执行以下行时

multipartFormData.append(item!, withName: "file", fileName: "image.png", mimeType: "image/png")

withName:"file"属性指的是POST请求图片的参数key（Json请求的key）。所以你不能在这里使用你想要的任何文本。请添加您的 API 引用的图像的正确参数键，而不是 "file"。假设 API 使用“fileImage”作为参数键访问图像。所以上面一行应该是这样的。

multipartFormData.append(item!, withName: "fileImage", fileName: "image.png", mimeType: "image/png")