Exhaust request body before closing it (#5596)
Exhaust request body before closing it (#5596)

Signed-off-by: bevisy <3cc2b0a06da5e319010cb4fe97c6135120e72c30@gmail.com>
alileza/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,prometheus/prometheus,Gouthamve/prometheus,alileza/prometheus,alileza/prometheus,kangwoo/prometheus,prometheus/prometheus,prometheus/prometheus,prometheus/prometheus,kangwoo/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,keegancsmith/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus