Let's say a user is starting to upload a file to the server via FileReference. What happens to that temporary file if the user cancels the upload or closes the browser? At what point is the server script called? Is the server script (in my case, ColdFusion) called only once the file has been successfully put on the server?
I'm trying to determine if I need to remove any temporary files or if FileReference is smart enough not to execute my server-side script before the file is done uploading to the server.