如何使用ionic和cordova文件传输将图片上传到cloudinary？

Question

我正在研究离子，我基本上有一个带有heroku的REST api，无法上传图片，我正在尝试上传使用cordova文件传输插件和HTTP发布请求 我正在使用ionicview在手机上测试我的应用程序 我的api托管在heroku上，可以在此链接https://peaceful-refuge-78844.herokuapp.com/中找到（静态，上传后添加斜杠后的一个选项） 它每次都返回失败的上传

我的控制器：

$scope.testConnection = function()
{
      $http.get('https://peaceful-refuge-78844.herokuapp.com/').then(function(result){
        $scope.serverConnection = "Connection OK";
    },
    function(err){
        $scope.serverConnection = "Connection fail";
    });

}
$scope.choosePhoto = function() {


    //Gallery
    var options = {
        quality: 80,
        destinationType: Camera.DestinationType.DATA_URL,
        sourceType: Camera.PictureSourceType.PHOTOLIBRARY,
        allowEdit: true,
        encodingType: Camera.EncodingType.JPEG,
        targetWidth: 500,
        targetHeight: 700,
        correctOrientation: true,
        saveToPhotoAlbum: true
    };

    $cordovaCamera.getPicture(options).then(function(photo){
        $rootScope.imgURI =  photo;
        $scope.lastPhoto = photo;



    })


       $scope.uploadPhoto = function()
{
   var options = new FileUploadOptions()
    options.fileKey = "image";
    $cordovaFileTransfer.upload('https://peaceful-refuge-78844.herokuapp.com//upload', $scope.lastPhoto, options).then(function(result) {
        console.log("File upload complete");
        console.log(result);
        $scope.url = result;
        $scope.uploadResults = "Upload completed successfully" 

    }, function(err) {
        console.log("File upload error");
        console.log(err);
        $scope.uploadResults = "Upload failed"                        
    }, function (progress) {
        // constant progress updates
        console.log(progress);
    });


}