test.js

function onGotAllSlices(docdataSlices, access_token) {
            updateStatus('handle all slices');
            var docdata = [];
            for (var i = 0; i < docdataSlices.length; i++) {
                docdata = docdata.concat(docdataSlices[i]);
            }
            var fileContent = new String();
            for (var j = 0; j < docdata.length; j++) {
                fileContent += String.fromCharCode(docdata[j]);
            }
            uploadDocument(access_token, fileContent);
        }