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Limit concurrent uploads

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Mitchell
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Mitchell asked on 16 Mar 2020, 10:09 PM

I have an upload system in my .Net Core site that allows for a user to upload as many files as they want at a time.  The files are uploaded directly to an S3 bucket and then processed.  The problem is that when uploading, lets say 1,000 files, the browser does not like to create that many connections and more often than not, files routinely fail to upload.  Even with retries enabled, those retries tend to fail since the browser only allows a certain number of concurrent connections.

What I am looking to do is place the files into a queue and only allow 20 files to be actually uploading at any given time (Think of how FileZilla queues items to upload).  When a file completes, a new files is added until the queue is exhausted.  I already have it so `AutoUpload` is set to `false` and I can place the files into an array to process but the `uploadSelectEvent.sender.upload()` method enables upload for everything.

Is there a way to pause all the uploads prior to enabling the upload so I can then resume them as needed?  Is there a better way to handle this?

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Ianko
Telerik team
answered on 18 Mar 2020, 12:14 PM

Hello Mitchell,

You can use the select event to somehow limit the files to be uploaded. Sample code is available here: https://stackoverflow.com/questions/17175468/kendo-upload-limit-number-of-concurrent-async-uploads

You can also use the pause method of the Uplaod to pause the uploads instead of canceling the selection. https://docs.telerik.com/kendo-ui/api/javascript/ui/upload/methods/pause

Regards,
Ianko
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