This change allows individual SLO segments to be downloaded by adding an extra 'part-number' query parameter to the GET request. You can also retrieve the Content-Length of an individual segment with a HEAD request. Co-Authored-By: Clay Gerrard <clay.gerrard@gmail.com> Co-Authored-By: Alistair Coles <alistairncoles@gmail.com> Change-Id: I7af0dc9898ca35f042b52dd5db000072f2c7512e