Google Drive API v3将Google电子表格下载为Excel

Question

I try to download a Google Drive spreadsheet as an Excel file. As far as I can tell, the Google Drive API should make this very simple by just specifying a different mime type to the export_media request.

Based on the tutorial script I can successfully download the spreadsheet as CVS and Open Office sheet. Great!

However with the mime type set to application/vnd.openxmlformats-officedocument.spreadsheetml.sheet - as specified for MS Excel the downloader continues to read from the stream without ever stopping and without increasing the status progress.

The full script is here . To run, follow the instructions to create an app in the Google Drive API docs here

The offending code is here:

    file_id = 'my spreadsheet id'

    request = service.files().export_media(fileId=file_id, mimeType='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')

    fh = FileIO('data.xls', 'wb')
    downloader = MediaIoBaseDownload(fh, request)
    done = False
    while done is False:
        status, done = downloader.next_chunk()
        print("Download %d%%." % int(status.progress() * 100))

It continues to print Download 0% and never stops.

Answer 1

It turns out that the MediaBaseIODownload relies on 'content-range or content-length` being present to know when to stop.

  if 'content-range' in resp:
    content_range = resp['content-range']
    length = content_range.rsplit('/', 1)[1]
    self._total_size = int(length)
  elif 'content-length' in resp:
    self._total_size = int(resp['content-length'])

However, in a debugger I can see, they are not present in the response. Hence, it cannot not know when being done.

  if self._progress == self._total_size:
    self._done = True

The solution was to not run a partial download but to download in full:

request = service.files().export_media(fileId=file_id, mimeType='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
with open('data.xlsx', 'wb') as f:
    f.write(request.execute())