Problem with FileTransfer () download in Phonegap

Question

I am developing a Phonegap application for Android and IOS. I am trying to download a file (.pdf) from a server using FileTransfer () and it works fine. But when I use fileTransfer.onprogress, it seems to upload more than the file size (my file is 20 MB and it downloads 40 MB more than 2x).

fileTransfer.onprogress = function(progressEvent) {
    if (progressEvent.lengthComputable) {
        var percent = progressEvent.loaded/progressEvent.total;
        //percent allways equal 2, than more 2x size of real file 
        console.log(percent);
    } 
};
//Else FileTransfer() upload working well.

I do not know why? Can someone explain to me why this is happening?

Answer 1

You are not the only one experiencing this:

http://www.raymondcamden.com/index.cfm/2013/5/1/Using-the-Progress-event-in-PhoneGap-file-transfers#c1D7DAFD0-D62D-FBCB-6ADA9A452CDD6A2E