c++ - c++ google drive api上传无标题文件

Question

我使用 WinHTTP 插入以下参数。文件成功上传，但标题为无标题文件。

POST /upload/drive/v2/files?access_token=918230812390812038389 HTTP/1.1
Host: www.googleapis.com
Content-Type: multipart/form-data; boundary="boundary"
Content-Length: 20176    

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

{
  "title": "test2.pdf"
}

--boundary
Content-Type: application/pdf

PDF CONTENTS

--boundary--