diff --git a/main.go b/main.go
index b98f637..33e017b 100644
--- a/main.go
+++ b/main.go
@@ -9,6 +9,7 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 )
 
@@ -53,6 +54,19 @@ type message struct {
 	Data    interface{}
 }
 
+func setMap[T string | time.Duration | int](obj *mapXS[T], key string, v T) {
+	obj.Lock()
+	(*obj.mapX)[key] = v
+	obj.Unlock()
+}
+
+type mapX[T string | int | time.Duration] map[string]T
+
+type mapXS[T string | int | time.Duration] struct {
+	*mapX[T]
+	*sync.Mutex
+}
+
 func newFetchHandler(fetchUrl string) *fetchHandler {
 	return &fetchHandler{
 		fetchUrl:      fetchUrl,
@@ -85,11 +99,6 @@ func (f *fetchHandler) receiveMsg() {
 				f.keyword[r.conn] = t.Keyword
 				f.handle(r.conn)
 			}
-
-		case "timeStepSet":
-			if t, ok := r.msg.Data.(int); ok {
-				f.reloadCron[r.conn] <- t
-			}
 		}
 	}
 }
@@ -145,6 +154,7 @@ func (f *fetchHandler) parsesDom(html *http.Response, conn string) {
 	}
 	var newFetch []fetchData
 	ti := time.Now()
+	log.Println(ti.Format("2006-01-02 15:04:05"))
 	compile := regexp.MustCompile(`(\d+)`)
 
 	doc.Find("div[class=\"result-op c-container xpath-log new-pmd\"]").Each(func(i int, selection *goquery.Selection) {
@@ -155,13 +165,16 @@ func (f *fetchHandler) parsesDom(html *http.Response, conn string) {
 		data.Desc = selection.Find(".c-row .c-color-text").First().Text()
 		data.Date = selection.Find("span[class=\"c-color-gray2 c-font-normal c-gap-right-xsmall\"]").First().Text()
 		n := compile.FindAllStringSubmatch(data.Date, -1)
-		nn, _ := strconv.Atoi(n[0][0])
-		if strings.Contains(data.Date, "小时") {
-			data.Date = ti.Add(-time.Duration(nn) * time.Hour).Format("2006-01-02 15:04")
-		}
-		if strings.Contains(data.Date, "分钟") {
-			data.Date = ti.Add(-time.Duration(nn) * time.Minute).Format("2006-01-02 15:04")
+		if nil != n {
+			nn, _ := strconv.Atoi(n[0][0])
+			if strings.Contains(data.Date, "小时") {
+				data.Date = ti.Add(-time.Duration(nn) * time.Hour).Format("2006-01-02 15:04")
+			}
+			if strings.Contains(data.Date, "分钟") {
+				data.Date = ti.Add(-time.Duration(nn) * time.Minute).Format("2006-01-02 15:04")
+			}
 		}
+
 		k := conn + "_" + data.Url + "_" + data.Title
 		if _, ok := f.hadFetchedMap[k]; !ok {
 			f.hadFetchData = append(f.hadFetchData, data)
@@ -267,7 +280,7 @@ func main() {
 			for {
 				err := conn.ReadJSON(&msg.msg)
 				if err != nil {
-					if !websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) {
+					if _, ok := h.connMap[remote]; ok && !websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) {
 						delete(h.connMap, remote)
 						cc <- 1
 						return