Angularjs 如何在angular dropzone指令中集成动态URL

我正在使用 angularjs中的文件上载代码。 这里是角下降区的链接--

我想上传多路径的文件。如何为动态url配置drozone指令 这是下降区指令

appControllers.directive('dropzone', dropzone);
function dropzone(){
return function(scope, element, attrs) {


    var config = {
        url : "api/company/logo/1",--->i want this url dynamically
        maxFilesize: 100,
        paramName: "uploadfile",
        maxThumbnailFilesize: 10,
        parallelUploads: 1,
        autoProcessQueue: true
    };

    var eventHandlers = {
        'addedfile': function(file) {           
            scope.file = file;
            if (this.files[1]!=null) {
                this.removeFile(this.files[0]);
            }
            scope.$apply(function() {
                scope.fileAdded = true;
            });
        },

        'success': function (file, response) {
        }
    };

    dropzone = new Dropzone(element[0], config);

    angular.forEach(eventHandlers, function(handler, event) {
        dropzone.on(event, handler);
    });


    scope.processDropzone = function() {
        dropzone.processQueue();
    };

    scope.resetDropzone = function() {
        dropzone.removeAllFiles();
    }
}}

指令代码：

    scope.processDropzone = function(url) {
        dropzone.options.url = url;
        dropzone.processQueue();
    };

从控制器：

    $scope.processDropzone("http://localhost:8080/my/custom/upload");