Use of ProgressEvent for upload and FileReference

programming flash
1

Hi

I have a question concerning the use of ProgressEvent and the upload of files that have a size of 3 or 4 mo ( = files that can’t be uploaded in 1 second or instantly)

I call my function progressUploadHandler on the event ProgressEvent.PROGRESS

function progressUploadHandler(event:ProgressEvent)
{

    var pourcentage = Math.ceil((event.bytesLoaded*100)/event.bytesTotal);
    trace(pourcentage);
}

What I don’t understand is how is it possible that the variable “pourcentage” reach the value of 100 in 1 or 2 seconds (which would mean the file is 100% uploaded) while the file is not 100% uploaded on the server and still needs a few seconds to be entirely sent.

1. So, what would bytesLoaded really refers to if I the variable “pourcentage” is equal to 100% whereas it is not entirely sent on the server?

2. What property or the event should I call to have the correct value of the data that are really uploaded when I call my function on ProgressEvent?

Many thanks for your help