使用改型在Google驱动器中上传一个多部分文件

POST https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart         
HTTP/1.1
Authorization: Bearer [YOUR_AUTH_TOKEN]
Content-Type: multipart/related; boundary=foo_bar_baz
Content-Length: [NUMBER_OF_BYTES_IN_ENTIRE_REQUEST_BODY]

--foo_bar_baz
Content-Type: application/json; charset=UTF-8

{
  "name": "myObject"
}

--foo_bar_baz
Content-Type: image/jpeg

[JPEG_DATA]

--foo_bar_baz--

我的问题是,

这样地:

@POST("/upload/drive/v3/files?uploadType=multipart")
@Multipart
Call<ModelMultipartResponse> sendMultipartUploadReq(@Header("Authorization")String authToken,
@Part MultipartBody.Part metaPart,
@Part MultipartBody.Part dataPart);