File upload CollectionFS/Meteor CollectionFS上载0字节的文件

我正在尝试将文件上载到dropbox应用程序。将包与适配器一起使用，我的问题是上载的文件是0字节。我不确定我在这里错过了什么或做错了什么

在服务器上：

var registrationImageStorage = new FS.Store.Dropbox("registrationStorage", {
  key: "****",
  secret: "****",
  token: "****",
  transformWrite: function (fileObj, readStream, writeStream) {
    gm(readStream, fileObj.name()).stream().pipe(writeStream);
  }
});

RegistrationImages = new FS.Collection("registrations", {
  stores: [registrationImageStorage],
  filter: {
    allow: {
      contentTypes: ['image/*']
    }
  }
});

RegistrationImages.allow({
  insert: function () {
    return true;
  },
  update: function () {
    return true;
  }
});

在客户端：

var registrationImageStorage = new FS.Store.Dropbox("registrationStorage");

RegistrationImages = new FS.Collection("registrations", {
  stores: [registrationImageStorage],
  filter: {
    allow: {
      contentTypes: ['image/*']
    }
  }
});

在客户端上启动上载：

var file = new FS.File($('#badgeImage').get(0).files[0]);

    RegistrationImages.insert(file, function (err, fileObj) {
      if (err) {
        console.log(err);
      } else {
        console.log(fileObj);
    });

---

好的，我不需要这部分代码，在删除它之后，它工作了：

transformWrite: function (fileObj, readStream, writeStream) {
    gm(readStream, fileObj.name()).stream().pipe(writeStream);
  }