Cancelling Ajax file upload post to Play

[Edem Nsefik]

A client posts a JavaScript Dom File object to play via Ajax to upload a file. If the request is cancelled by the client the global error handler picks up an unexpected request termination. 

I would like to clean up the temporary file from this aborted upload, but when debugging the situation, only stops in the error handler class are being activated. Why would that be?

I am investigating as to whether I could use web-sockets to upload the file and if this would be an easier way to cancel an upload. With web-scokets, would there be any advantage to push the same javaScript Dom File object?