File IDs in the object version to download with the key. Not used if uploadID is not zero or fileRef is not empty.
upload_id
int32
3
The identifier of the upload operation (from UploadTempFile or UploadTempFileCommit). If this is not zero, objVer and fileIds are ignored, and the download key is generated for downloading the file uploaded in the upload operation identified by this parameter.
file_ref
string
4
If not empty, the file_ref of a stateless upload ended with FileUploadEnd, and the download key is generated for downloading it; objVer and fileIds are ignored. At most one of uploadID and fileRef may be set.
extension
string
5
The extension of the file, not including the dot (e.g. "doc"). Used with fileRef only, as a file_ref has no file name.
