I want to detect conflict when updating a file to Drive. To accomplish this, it seems I have to set the If-Match
header.
Currently, I update the doc to Google Drive with this one-liner:
mDriveFile = mService.files().update(mDriveFile.getId(), mDriveFile, byteContent).execute();
What is the simplest way to add the If-Match
header in the request? Example in Files: update documentation does not tell how to set HTTP headers.