HTML5 File API - slicing or not?

Question

There are some nice examples about file uploading at HTML5 Rocks but there are something that isn\'t clear enough for me.

As far as i see, the example code about file sl

Answer 1

This is the way to slice the file to pass as blobs:

function readBlob() {
    var files = document.getElementById('files').files;
    var file = files[0];
    var ONEMEGABYTE = 1048576;
    var start = 0;
    var stop = ONEMEGABYTE;

    var remainder = file.size % ONEMEGABYTE;
    var blkcount = Math.floor(file.size / ONEMEGABYTE);
    if (remainder != 0) blkcount = blkcount + 1;

    for (var i = 0; i < blkcount; i++) {

        var reader = new FileReader();
        if (i == (blkcount - 1) && remainder != 0) {
            stop = start + remainder;
        }
        if (i == blkcount) {
            stop = start;
        }

        //Slicing the file 
        var blob = file.webkitSlice(start, stop);
        reader.readAsBinaryString(blob);
        start = stop;
        stop = stop + ONEMEGABYTE;

    } //End of loop

} //End of readblob