admin: Use gin-gonic as router

admin/api/monitor.go

@@ -3,20 +3,20 @@ package api
 import (
 	"bufio"
 	"io/ioutil"
+	"net/http"
 	"os"
 	"strconv"
 	"strings"
 
-	"github.com/julienschmidt/httprouter"
+	"github.com/gin-gonic/gin"
 )
 
-func init() {
-	router.GET("/api/monitor", apiHandler(
-		func(httprouter.Params, []byte) (interface{}, error) {
-			return map[string]interface{}{
-				"localhost": genLocalConstants(),
-			}, nil
-		}))
+func declareMonitorRoutes(router *gin.RouterGroup) {
+	router.GET("/monitor", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{
+			"localhost": genLocalConstants(),
+		})
+	})
 }
 
 func readLoadAvg(fd *os.File) (ret map[string]float64) {
@@ -58,7 +58,7 @@ func readCPUStats(fd *os.File) (ret map[string]map[string]uint64) {
 			ret[f[0]] = map[string]uint64{}
 			var total uint64 = 0
 			for i, k := range []string{"user", "nice", "system", "idle", "iowait", "irq", "softirq"} {
-				if v, err := strconv.ParseUint(f[i + 1], 10, 64); err == nil {
+				if v, err := strconv.ParseUint(f[i+1], 10, 64); err == nil {
 					ret[f[0]][k] = v
 					total += v
 				}