Simplified version of "angular-file-upload" directive. Removed support for old browsers. (original version: https://github.com/danialfarid/angular-file-upload)

controllers.js

"use strict";

app.controller('mainCtrl', ['$scope', '$http',
    function($scope, $http) {
        $scope.onFileSelect = function(files) {
            console.log(files);
            for (var i = 0; i < files.length; i++) {
                var file = files[i];
                $http.uploadFile({
                    url: 'api/file',
                    file: file
                })
            }
        }
    }
]);

directives.js

"use strict";

var directives = angular.module('myapp.directives', []);

directives.directive('ngFileSelect', ['$parse', '$http',
    function($parse, $http) {
        if ($http.uploadFile === undefined) {
            $http.uploadFile = function(config) {
                console.log(config)
                return $http({
                    method: 'POST',
                    url: config.url,
                    headers: {
                        'Content-Type': false
                    },
                    transformRequest: function(data) {
                        var formData = new FormData();
                        formData.append('file', config.file);
                        return formData;
                    }
                });
            };
        }

        return function(scope, elem, attr) {
            var fn = $parse(attr['ngFileSelect']);
            elem.bind('change', function(evt) {
                var files = [];
                var fileList = evt.target.files;
                for (var i = 0; i < fileList.length; i++) {
                    files.push(fileList.item(i));
                }
                scope.$apply(function() {
                    fn(scope, {
                        files: files,
                        $event: evt
                    });
                });
            });
        };
    }
]);

upload.html

<input type="file" ng-file-select="onFileSelect(files)" multiple>