fileworker.js

log = console.log;
self.onmessage = function(e) {
    debugger;
    var data = new FormData();
    data.append('Filedata', e.data.file.slice(0, 127), encodeURI(e.data.file.name));
    console.log(e.data.file.slice(0, 127));
    var xhr = new XMLHttpRequest();
    log('worker: xhr.open');
    xhr.open('POST', location.href, false);
    log('worker: xhr.send');
    xhr.send(data);
    log('worker: xhr.send.finished');
}