added enlapsed time to make the query on document.

handlerWrapper.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"log"
 	"net/http"
+	"time"
 )
 
 type errorWrapper struct {
@@ -12,9 +13,17 @@ type errorWrapper struct {
 
 type ApiHandler func(w http.ResponseWriter, request *http.Request) (interface{}, error)
 
+func (this ApiHandler) addEnlapsedTimeIfPossible(enlapsedTime time.Duration, obj interface{}) {
+	if dict, ok := obj.(map[string]interface{}); ok {
+		dict["enlapsed_time"] = enlapsedTime.Seconds()
+	}
+
+}
 func (this ApiHandler) ServeHTTP(w http.ResponseWriter, request *http.Request) {
 	log.Println("request for", request.URL)
+	t := time.Now()
 	ret, err := this(w, request)
+	this.addEnlapsedTimeIfPossible(time.Since(t), ret)
 	if err != nil {
 		log.Println(err)
 		ret = &errorWrapper{err.Error()}