How do I suspend， continue or cancle task when use S3 multipartUpload

[yjjandyxy]

How do I suspend， continue or cancel task when using S3 multipart upload

[adam-fowler]

You can throw an error from the progress function to cancel a multipart upload.

If you called multipartUpload with abortOnFail set to true it will abort the multipart upload and clean up.

If you call multipartUpload with abortOnFail set to false instead of aborting the multipart upload on an error being thrown it throws a new error type S3ErrorType.multipart.abortedUpload which includes all the information you need to resume the upload in a S3.ResumeMultipartUploadRequest and the error that caused the upload to fail. You can then use the S3.ResumeMultipartUploadRequest object in resumeMultipartUpload to resume the multipart upload.

You can find out more here

[yjjandyxy]

cancel task，I don't know much about it， Can you give me a demo? or give me some code

[adam-fowler]

You could do something similar to this. When you set cancelMultipartUpload to true it will cancel the multipart operation. Currently Soto doesn't support Swift concurrency cancellation using Task.cancel. It is on the list of things to fix.

import SotoS3

struct MultipartCancellationError: Error {}

var cancelMultipartUpload = false
let client = AWSClient(httpClientProvider: .createNew)
let s3 = S3(client: client)

let request = S3.CreateMultipartUploadRequest(bucket: "myBucket", key: "myKey")
let result = try s3.multipartUpload(request, filename: "tests.crash", abortOnFail: false) { progress in
    if cancelMultipartUpload {
        throw MultipartCancellationError()
    }
    print(progress)
}.wait()

[yjjandyxy]

Thanks