uploadService.js

app.service('multipartForm', ['$http', function($http){
        this.post = function(uploadUrl, data){
            var fd = new FormData();
            for(var key in data)
                fd.append(key, data[key]);
            $http.post(uploadUrl, fd, {
                transformRequest: angular.identity,
                headers:{'Content-Type': undefined}
            })
            .success(function(){
                console.log('success');
            })
            .error(function(){
                console.log('error');
            });
        }
    }]);