if rrc.Context.Err() != nil {
// If caller hung up, log that instead of subsequent/misleading errors.
http.Error(rrc.ResponseWriter, rrc.Context.Err().Error(), http.StatusGatewayTimeout)
if rrc.Context.Err() != nil {
// If caller hung up, log that instead of subsequent/misleading errors.
http.Error(rrc.ResponseWriter, rrc.Context.Err().Error(), http.StatusGatewayTimeout)