Multiparty постоянно вываливается с ошибкой Request aborted

var file = event.currentTarget.files[0] ;
if (file) {
 var formData = new FormData();
 formData.append("uploaded_file", file);
 formData.append("command", 'goodphoto_upload');
 formData.append("uuid", data.uuid);
 uploadFile("/server",formData) ;
}
 
function uploadFile(url,formData,onload,onerror,onprogress) {   
    var xhr = new XMLHttpRequest();     
    if (typeof(onprogress)=='function') {
        xhr.upload.onprogress = onprogress ;
    }else {
        xhr.upload.onprogress = function(event) {
            var name = '' ;
            console.log('file ' + name + ' loaded ' + event.loaded + ' / ' + event.total);
        } ;
    } ; 
    if (typeof(onload)=='function') {
        xhr.upload.onload = onload ;
    }else {
        xhr.upload.onload = function(event) {
            var name = '' ;
            console.log('file ' + name + 'is loaded.');
        } ;
    } ;     
    if (typeof(onload)=='function') {
        xhr.onload = onload ; 
    }else {
        xhr.onload = function() {
            var name = '' ;
            if (this.status == 200) {
                console.log('file ' + name + ' is loaded') ;
            }else {
                console.log('file ' + name + ' is not loaded, error ' + + this.status) ;
            }
        } ;
    } ; 
    if (typeof(onerror)=='function') {
        xhr.onerror = onerror ;
    } else {
        xhr.onerror = function() {
            var name = '' ;
            console.log('file ' + name + ' is not loaded, error ' + + this.status) ;
        } ;
    } ;
    xhr.open("POST", url, true);
    xhr.send(formData); 
}

var mpForm = new multiparty.Form();
mpForm.parse(req, function(err, fields, files, fieldsList, filesList) {
        console.log(err) ;
}