想請教一下大家，關于在angularJs中進行文件上傳時，上傳路徑該如何定義？比如看到網上有個例子如下：.directive.js中.controller('myCtrl', ['$scope', 'fileUpload', function($scope, fileUpload){?? ???? $scope.uploadFile = function(){?? ??? ??? ?debugger;?? ???????? var file = $scope.myFile;?? ???????? console.log('file is ' );?? ???????? console.dir(file);?? ???????? var uploadUrl = "/file";?? ???????? debugger;?? ???????? fileUpload.uploadFileToUrl(file, uploadUrl);?? ???????? debugger;?? ???? };?? ??? ??? ?}]);.service.js中.factory('fileUpload', ['$http', function ($http) {?? ??? ???? var uploadFileToUrl = function(file, uploadUrl){?? ??? ???????? var fd = new FormData();?? ??? ???????? fd.append('file', file);?? ??? ???????? debugger;?? ??? ???????? $http.post(uploadUrl, fd, {?? ??? ???????????? transformRequest: angular.identity,?? ??? ???????????? headers: {'Content-Type': undefined}?? ??? ???????? })?? ??? ???????? .success(function(){?? ??? ??????? ??? ?alert("圖片上傳成功！");?? ??? ???????? })?? ??? ???????? .error(function(){?? ??? ??????? ??? ?alert("error，圖片上傳失敗！");?? ??? ???????? });?? ??? ???? };?? ??? ??? ??? ??? ???? return {?? ??? ??? ??? ?uploadFileToUrl : uploadFileToUrl ?? ??? ???? };?? ??? ?}]);項目首頁請求地址是localhost:3000，但是項目的真實port是8080。那保存文件的路徑/file是在哪里？