dropzone.min.js 怎么能获取后台返回的数据？

javascript$("#fileUpload").dropzone({
        url: "/upload/",
        maxFilesize: 5,
        addRemoveLinks: true,
        acceptedFiles: ".gif,.jpg,.png",
        success: function(file, data) {
            console.log(file + "," + data);
        },
        init: function(file) {
            console.log(file);
          }
    });

怎么都没后台数据

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找到了，在xhr里面