是否可以使用Drive.Files.update()执行断点续传

我有两个部分下载的文件(在我的云端硬盘中)，这些文件是我先前拆分的.这两个文件共同构成了整个文件.我的目标是使用Apps脚本将其合并(即加入)在Google云端硬盘中.

I have two partially downloaded files (in my Drive), which I had split earlier. Both of these files together form the whole file. My goal is to merge (i.e join) them in Google Drive using Apps Script.

到目前为止我做了什么?

What I have done so far?

我用Drive.Files.insert上传了第一部分.然后我尝试Drive.Files.update将第二部分上传到第一部分.但是它将覆盖文件.

I used Drive.Files.insert to upload the first part. Then I tried Drive.Files.update to upload the second part to the first part's. It however overwrites the file.

我的问题:是否可以使用该方法添加/添加文件?

My question : Is it possible to join/append files using that method?

注意:我可以使用cat或type

这是我的工作的示例代码:

Here is a sample code of my work:

  var resource = {
    title : 'Demo'
  };

  var mediaData = f1.getBlob();
  //f1 contains the file 1

  var headers = {
    'Content-Length' : f1.getSize(),
    'Content-Type': 'application/json; charset=UTF-8',
     uploadType : 'resumable'
  }

  var file = Drive.Files.insert(resource, mediaData, {headers : headers});

  var fileId = file.id;

  resource = {
    title : 'New Demo',
    mimeType : 'pdf'
  };

  mediaData = f2.getBlob();
  //f2 contains file 2

  headers = {
    'Content-Type' : 'application/json; charset=UTF-8',
    uploadType : 'resumable'
  };

  var file = Drive.Files.update(resource, fileId, mediaData, {headers : headers});

  Logger.log(file.id + '\n' + file.fileSize);
}