fix: 🐛 fix memory leak for goroutine

Author: import-yuefeng

core/cache/cache.go

@@ -12,7 +12,7 @@ package cache
 
 import (
 	"container/list"
-	"fmt"
+	"strings"
 	"sync"
 	"time"
 
@@ -185,7 +185,11 @@ func (c *Cache) GetFastTable(key string) *FastMap {
 
 // Key creates a hash key from a question section.
 func Key(q dns.Question) string {
-	return fmt.Sprintf("%s %d", q.Name, q.Qtype)
+	var key strings.Builder
+	key.WriteString(q.Name)
+	Qtype := []byte{byte(q.Qtype), byte(q.Qtype >> 8)}
+	key.Write(Qtype)
+	return key.String()
 }
 
 // Hit returns a dns message from the cache. If the message's TTL is expired nil

core/cron/timer.go

@@ -61,7 +61,7 @@ func (worker *CacheManager) Handle() {
 			if !ok {
 				break
 			} else {
-				log.Info(worker.TaskSum)
+				log.Info("Now timer task: ", worker.TaskSum)
 				worker.TaskSum--
 			}
 		}

core/detector/ping/ping.go

@@ -10,6 +10,7 @@ import (
 	"container/list"
 	"reflect"
 	"strings"
+	"time"
 
 	"github.com/import-yuefeng/smartDNS/core/cache"
 	"github.com/import-yuefeng/smartDNS/core/outbound/clients"
@@ -92,6 +93,7 @@ func (data *Pinger) Detect() (fastTable *list.List) {
 				log.Error(err)
 				return
 			}
+			pinger.Timeout = time.Second * 10
 			pinger.Count = 1
 			pinger.Run()
 			stat := pinger.Statistics()

go.sum

@@ -6,6 +6,7 @@ github.com/miekg/dns v1.1.15 h1:CSSIDtllwGLMoA6zjdKnaE6Tx6eVUxQ29LUgGetiDCI=
 github.com/miekg/dns v1.1.15/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
 github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4/go.mod h1:4OwLy04Bl9Ef3GJJCoec+30X3LQs/0/m4HFRt/2LUSA=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/robfig/cron v1.2.0 h1:ZjScXvvxeQ63Dbyxy76Fj3AT3Ut0aKsyd2/tl3DTMuQ=
 github.com/robfig/cron v1.2.0/go.mod h1:JGuDeoQd7Z6yL4zQhZ3OPEVHB7fL6Ka6skscFHfmt2k=
 github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=