rename ngin to rest

rest/handler/metrichandler.go

@@ -0,0 +1,23 @@
+package handler
+
+import (
+	"net/http"
+
+	"zero/core/stat"
+	"zero/core/timex"
+)
+
+func MetricHandler(metrics *stat.Metrics) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			startTime := timex.Now()
+			defer func() {
+				metrics.Add(stat.Task{
+					Duration: timex.Since(startTime),
+				})
+			}()
+
+			next.ServeHTTP(w, r)
+		})
+	}
+}