Google's resumable video upload status API endpoint for Google Drive is failing with HTTP 400: "Failed to parse Content-Range header."

[Rene Leistikow via StackOverflow]

In order to resume an interrupted upload to Google Drive, we have implemented status requests to Google's API following this guide. https://developers.google.com/drive/v3/web/resumable-upload#resume-upload

Request:

PUT
https://www.googleapis.com/upload/drive/v3/files?uploadType=resumable&upload_id=UPLOAD_ID HTTP/1.1 
Content-Length: 0 
Content-Range: bytes */*

It works perfectly in most of the cases. However, the following error occurs occasionally and even retries of the same call result in the same erroneous response.

Response:

HTTP 400: "Failed to parse Content-Range header." 

We are using the google.appengine.api.urlfetch Python library to make this request in our Python App Engine backend.

Any ideas?

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