I make it work now, but I have another problem. On the server side, I have no idea how to save files that have been browsed by the user. Which parameter should I use on either PHP or Rails? Usually, if we upload using input file element, we know which parameter to take file to save, but using getAsBlob() and this result to gear to upload, is a little bit weird. Should I have to set any request headers of my xhr?\
Any idea is appreciated? Thanks
