type connStats struct {
	internodeInputBytes  uint64
	internodeOutputBytes uint64
	s3InputBytes         uint64
	s3OutputBytes        uint64
}

// Increase internode total input bytes
func (s *connStats) incInternodeInputBytes(n int64) {
	atomic.AddUint64(&s.internodeInputBytes, uint64(n))
}

// Increase internode total output bytes
func (s *connStats) incInternodeOutputBytes(n int64) {

		f.ServeHTTP(w, r)

		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if !ok || tc == nil {
			return
		}

		globalConnStats.incInternodeInputBytes(int64(tc.RequestRecorder.Size()))
		globalConnStats.incInternodeOutputBytes(int64(tc.ResponseRecorder.Size()))
	}
}

func collectAPIStats(api string, f http.HandlerFunc) http.HandlerFunc {