gistfile1.js

   var makeFileUploadable = function(file) {
       var ob = {}
       $scope.reader = new FileReader();
       $scope.reader.onloadend = function(e) {
           console.log(e.target.result);
           ob.fileData = e.target.result;
           uploadFile(ob)
       }
       $scope.reader.onerror = function(e) {
           deferred.reject(e.target.error);
       }
       $scope.reader.readAsArrayBuffer(file);
   }


 var uploadFile = function(file) {
        var promise =
            $http({
                method: "POST",
                url: _API_ + "lists(guid'" + file.ID_List + "')" +
                    "/RootFolder/Files/add(url=@TargetFileName,overwrite='true')?" +
                    "&@TargetFileName='" + $scope.newFileName + "." + $scope.fileExtension + "'",
                data: file.fileData,
                headers: {
                    "X-RequestDigest": _DIGEST,
                    "accept": "application/json;odata=verbose"
                }
            })
        promise.then(
            function(response) {
                getItemFields(response.data.d)
            }
        );
    }