Alamofire: How to cancel MultipartData request?

[lalitkumarchoudhary]

I am not able to cancel below multipart data upload request when internet connection not available. Any suggestions?

Alamofire.upload(
    .POST,
    "https://httpbin.org/post",
    multipartFormData: { multipartFormData in
        multipartFormData.appendBodyPart(fileURL: unicornImageURL, name: "unicorn")
        multipartFormData.appendBodyPart(fileURL: rainbowImageURL, name: "rainbow")
    },
    encodingCompletion: { encodingResult in
        switch encodingResult {
        case .Success(let upload, _, _):
            upload.responseJSON { response in
                debugPrint(response)
            }
        case .Failure(let encodingError):
            print(encodingError)
        }
    }
)

[cnoon]

Hi @lalitkumarchoudhary,

You should store the upload reference as a property that you can call cancel on.

class NetworkManager {
    private var uploadRequest: Request?

    func startUpload() {
        Alamofire.upload(
            .POST,
            "https://httpbin.org/post",
            multipartFormData: { multipartFormData in
                multipartFormData.appendBodyPart(fileURL: unicornImageURL, name: "unicorn")
                multipartFormData.appendBodyPart(fileURL: rainbowImageURL, name: "rainbow")
            },
            encodingCompletion: { encodingResult in
                switch encodingResult {
                case .Success(let upload, _, _):
                    uploadRequest = upload

                    upload.responseJSON { response in
                        debugPrint(response)
                        uploadRequest = nil
                    }
                case .Failure(let encodingError):
                    print(encodingError)
                }
            }
        )
    }

    func cancelUpload() {
        uploadRequest?.cancel()
        uploadRequest = nil
    }
}

Hopefully that helps. In the future, I'd encourage you to ask this type of question on Stack Overflow. We use our GitHub project for bug reports and feature requests.

Cheers. 🍻

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[gaoshanyu]

@cnoon I've followed the steps you placed above, but my app crashed when the upload request cancel, can you help on SO?

[danipralea]

That's awesome @cnoon thanks a lot for the code!

[NikunjKumbhani]

Hello Help me How to Store Multiple Upload Requests and delete based on selected request array in Alamofire i've used swift 2.3 and Alamofire '3.4'

[jerrypm]

how to upload more than one image data with different image parameters ??