[javascript] Angularjs $http post file and form data

In my solution, i have

$scope.uploadVideo = function(){
    var uploadUrl = "/api/uploadEvent";


    //obj with data, that can be one input or form
    file = $scope.video;
    var fd = new FormData();


    //check file form on being
    for (var obj in file) {
        if (file[obj] || file[obj] == 0) {
            fd.append(obj, file[obj]);
        }
    }

    //open XHR request
    var xhr = new XMLHttpRequest();


    // $apply to rendering progress bar for any chunking update
    xhr.upload.onprogress = function(event) {
        $scope.uploadStatus = {
            loaded: event.loaded,
            total:  event.total
        };
        $scope.$apply();
    };

    xhr.onload = xhr.onerror = function(e) {
        if (this.status == 200 || this.status == 201) {

            //sucess

            $scope.uploadStatus = {
                loaded: 0,
                total:  0
            };


            //this is for my solution
            $scope.video = {};
            $scope.vm.model.push(JSON.parse(e.currentTarget.response));
            $scope.$apply();

        } else {
           //on else status
        }
    };

    xhr.open("POST", uploadUrl, true);

    //token for upload, thit for my solution
    xhr.setRequestHeader("Authorization", "JWT " + window.localStorage.token);


    //send
    xhr.send(fd); 
};

}