diff --git a/internal/caches/list_file_db.go b/internal/caches/list_file_db.go
index 8388f2a..9bd2c64 100644
--- a/internal/caches/list_file_db.go
+++ b/internal/caches/list_file_db.go
@@ -662,7 +662,7 @@ func (this *FileListDB) shouldRecover() bool {
 	var errString = ""
 	var shouldRecover = false
 	if result.Next() {
-		err = result.Scan(&errString)
+		_ = result.Scan(&errString)
 		if strings.TrimSpace(errString) != "ok" {
 			shouldRecover = true
 		}
diff --git a/internal/caches/list_file_db_test.go b/internal/caches/list_file_db_test.go
index a755f89..bd7f424 100644
--- a/internal/caches/list_file_db_test.go
+++ b/internal/caches/list_file_db_test.go
@@ -101,6 +101,9 @@ func TestFileListDB_CleanMatchPrefix(t *testing.T) {
 	}
 
 	err = db.Init()
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	err = db.CleanMatchPrefix("https://*.goedge.cn/large-text")
 	if err != nil {
diff --git a/internal/caches/manager.go b/internal/caches/manager.go
index ee27295..a4cde69 100644
--- a/internal/caches/manager.go
+++ b/internal/caches/manager.go
@@ -148,8 +148,7 @@ func (this *Manager) FindPolicy(policyId int64) *serverconfigs.HTTPCachePolicy {
 	this.locker.RLock()
 	defer this.locker.RUnlock()
 
-	p, _ := this.policyMap[policyId]
-	return p
+	return this.policyMap[policyId]
 }
 
 // FindStorageWithPolicy 根据策略ID查找存储
@@ -157,8 +156,7 @@ func (this *Manager) FindStorageWithPolicy(policyId int64) StorageInterface {
 	this.locker.RLock()
 	defer this.locker.RUnlock()
 
-	storage, _ := this.storageMap[policyId]
-	return storage
+	return this.storageMap[policyId]
 }
 
 // NewStorageWithPolicy 根据策略获取存储对象
diff --git a/internal/caches/storage_file.go b/internal/caches/storage_file.go
index d8cc5f3..56b418c 100644
--- a/internal/caches/storage_file.go
+++ b/internal/caches/storage_file.go
@@ -1276,13 +1276,6 @@ func (this *FileStorage) increaseHit(key string, hash string, reader Reader) {
 			this.hotMapLocker.Lock()
 			hotItem, ok := this.hotMap[key]
 
-			// 限制热点数据存活时间
-			var unixTime = time.Now().Unix()
-			var expiresAt = reader.ExpiresAt()
-			if expiresAt <= 0 || expiresAt > unixTime+HotItemLifeSeconds {
-				expiresAt = unixTime + HotItemLifeSeconds
-			}
-
 			if ok {
 				hotItem.Hits++
 			} else if len(this.hotMap) < HotItemSize { // 控制数量
diff --git a/internal/caches/utils_partial.go b/internal/caches/utils_partial.go
index 7ae8f99..70f7f10 100644
--- a/internal/caches/utils_partial.go
+++ b/internal/caches/utils_partial.go
@@ -8,7 +8,7 @@ import "strings"
 func partialRangesFilePath(path string) string {
 	// ranges路径
 	var dotIndex = strings.LastIndex(path, ".")
-	var rangePath = ""
+	var rangePath string
 	if dotIndex < 0 {
 		rangePath = path + "@ranges.cache"
 	} else {
diff --git a/internal/encrypt/method_aes_128_cfb_test.go b/internal/encrypt/method_aes_128_cfb_test.go
index 9e1b8f7..d0e9d33 100644
--- a/internal/encrypt/method_aes_128_cfb_test.go
+++ b/internal/encrypt/method_aes_128_cfb_test.go
@@ -19,7 +19,6 @@ func TestAES128CFBMethod_Encrypt(t *testing.T) {
 	dst = dst[:len(src)]
 	t.Log("dst:", string(dst))
 
-	src = make([]byte, len(src))
 	src, err = method.Decrypt(dst)
 	if err != nil {
 		t.Fatal(err)
@@ -64,7 +63,6 @@ func TestAES128CFBMethod_Encrypt2(t *testing.T) {
 
 	for _, dst := range sources {
 		dst2 := append([]byte{}, dst...)
-		src2 := make([]byte, len(dst2))
 		src2, err := method.Decrypt(dst2)
 		if err != nil {
 			t.Fatal(err)
diff --git a/internal/iplibrary/action_ipset.go b/internal/iplibrary/action_ipset.go
index 4629a48..7169893 100644
--- a/internal/iplibrary/action_ipset.go
+++ b/internal/iplibrary/action_ipset.go
@@ -283,7 +283,7 @@ func (this *IPSetAction) runActionSingleIP(action string, listType IPListType, i
 		return nil
 	}
 
-	var listName = ""
+	var listName string
 	var isIPv6 = strings.Contains(item.IpFrom, ":")
 
 	switch listType {
diff --git a/internal/iplibrary/action_manager.go b/internal/iplibrary/action_manager.go
index 86e6a51..879dfe1 100644
--- a/internal/iplibrary/action_manager.go
+++ b/internal/iplibrary/action_manager.go
@@ -102,7 +102,7 @@ func (this *ActionManager) UpdateActions(actions []*firewallconfigs.FirewallActi
 			continue
 		}
 
-		instances, _ := this.eventMap[action.EventLevel]
+		var instances = this.eventMap[action.EventLevel]
 		instances = append(instances, instance)
 		this.eventMap[action.EventLevel] = instances
 	}
diff --git a/internal/iplibrary/manager_ip_list.go b/internal/iplibrary/manager_ip_list.go
index 78f5ded..55d5de6 100644
--- a/internal/iplibrary/manager_ip_list.go
+++ b/internal/iplibrary/manager_ip_list.go
@@ -214,7 +214,7 @@ func (this *IPListManager) fetch() (hasNext bool, err error) {
 
 func (this *IPListManager) FindList(listId int64) *IPList {
 	this.locker.Lock()
-	list, _ := this.listMap[listId]
+	var list = this.listMap[listId]
 	this.locker.Unlock()
 	return list
 }
diff --git a/internal/nodes/client_listener.go b/internal/nodes/client_listener.go
index a76ba63..53f7368 100644
--- a/internal/nodes/client_listener.go
+++ b/internal/nodes/client_listener.go
@@ -48,7 +48,7 @@ func (this *ClientListener) Accept() (net.Conn, error) {
 			firewalls.DropTemporaryTo(ip, expiresAt)
 		} else {
 			if !waf.SharedIPWhiteList.Contains(waf.IPTypeAll, firewallconfigs.FirewallScopeGlobal, 0, ip) {
-				var ok = false
+				var ok bool
 				expiresAt, ok = waf.SharedIPBlackList.ContainsExpires(waf.IPTypeAll, firewallconfigs.FirewallScopeGlobal, 0, ip)
 				if ok {
 					canGoNext = false
diff --git a/internal/nodes/http_request_host_redirect.go b/internal/nodes/http_request_host_redirect.go
index 7d47710..2103ae2 100644
--- a/internal/nodes/http_request_host_redirect.go
+++ b/internal/nodes/http_request_host_redirect.go
@@ -34,7 +34,7 @@ func (this *HTTPRequest) doHostRedirect() (blocked bool) {
 			}
 		}
 
-		var fullURL = ""
+		var fullURL string
 		if u.BeforeHasQuery() {
 			fullURL = this.URL()
 		} else {
@@ -194,7 +194,7 @@ func (this *HTTPRequest) doHostRedirect() (blocked bool) {
 				return false
 			}
 
-			var containsPort = false
+			var containsPort bool
 			if u.PortsAll {
 				containsPort = true
 			} else {
diff --git a/internal/nodes/http_writer.go b/internal/nodes/http_writer.go
index 8d00744..b39c6d1 100644
--- a/internal/nodes/http_writer.go
+++ b/internal/nodes/http_writer.go
@@ -731,7 +731,6 @@ func (this *HTTPWriter) PrepareCompression(resp *http.Response, size int64) {
 	}
 
 	// compression writer
-	var err error = nil
 	compressionWriter, err := compressions.NewWriter(this.writer, compressionType, int(this.compressionConfig.Level))
 	if err != nil {
 		remotelogs.Error("HTTP_WRITER", err.Error())
diff --git a/internal/re/regexp_test.go b/internal/re/regexp_test.go
index 695e0e9..d2cef6d 100644
--- a/internal/re/regexp_test.go
+++ b/internal/re/regexp_test.go
@@ -149,7 +149,7 @@ func BenchmarkRegexp_MatchString(b *testing.B) {
 }
 
 func BenchmarkRegexp_MatchString2(b *testing.B) {
-	var r = regexp.MustCompile("(?i)(onmouseover|onmousemove|onmousedown|onmouseup|onerror|onload|onclick|ondblclick|onkeydown|onkeyup|onkeypress)(\\s|%09|%0A|(\\+|%20))*(=|%3D)")
+	var r = regexp.MustCompile(`(?i)(onmouseover|onmousemove|onmousedown|onmouseup|onerror|onload|onclick|ondblclick|onkeydown|onkeyup|onkeypress)(\s|%09|%0A|(\+|%20))*(=|%3D)`)
 	b.ResetTimer()
 
 	for i := 0; i < b.N; i++ {
diff --git a/internal/ttlcache/cache.go b/internal/ttlcache/cache.go
index f6a0e71..c709ae6 100644
--- a/internal/ttlcache/cache.go
+++ b/internal/ttlcache/cache.go
@@ -13,7 +13,6 @@ var SharedCache = NewBigCache()
 //
 //	    Piece1            |  Piece2 | Piece3 | ...
 //	[ Item1, Item2, ... ] |   ...
-//
 type Cache struct {
 	isDestroyed bool
 	pieces      []*Piece
@@ -123,19 +122,11 @@ func (this *Cache) Read(key string) (item *Item) {
 	return this.pieces[uint64Key%this.countPieces].Read(uint64Key)
 }
 
-func (this *Cache) readIntKey(key uint64) (value *Item) {
-	return this.pieces[key%this.countPieces].Read(key)
-}
-
 func (this *Cache) Delete(key string) {
 	var uint64Key = HashKey([]byte(key))
 	this.pieces[uint64Key%this.countPieces].Delete(uint64Key)
 }
 
-func (this *Cache) deleteIntKey(key uint64) {
-	this.pieces[key%this.countPieces].Delete(key)
-}
-
 func (this *Cache) Count() (count int) {
 	for _, piece := range this.pieces {
 		count += piece.Count()
diff --git a/internal/utils/ip.go b/internal/utils/ip.go
index 2f9c300..b5f9ba4 100644
--- a/internal/utils/ip.go
+++ b/internal/utils/ip.go
@@ -34,10 +34,7 @@ func IsLocalIP(ipString string) bool {
 
 	// IPv6
 	if strings.Contains(ipString, ":") {
-		if ip.String() == "::1" {
-			return true
-		}
-		return false
+		return ip.String() == "::1"
 	}
 
 	// IPv4
diff --git a/internal/utils/sync/map_int.go b/internal/utils/sync/map_int.go
index f89ae8d..0f358f3 100644
--- a/internal/utils/sync/map_int.go
+++ b/internal/utils/sync/map_int.go
@@ -72,7 +72,7 @@ func (this *IntMap[K, V]) Has(k K) bool {
 func (this *IntMap[K, V]) Get(k K) (value V) {
 	var index = this.index(k)
 	this.lockers[index].RLock()
-	value, _ = this.m[index][k]
+	value = this.m[index][k]
 	this.lockers[index].RUnlock()
 	return
 }
diff --git a/internal/utils/system_1.19.go b/internal/utils/system_1.19.go
index 5a267b2..30bfccd 100644
--- a/internal/utils/system_1.19.go
+++ b/internal/utils/system_1.19.go
@@ -12,7 +12,7 @@ func setMaxMemory(memoryGB int) {
 	if memoryGB <= 0 {
 		memoryGB = 1
 	}
-	var maxMemoryBytes int64 = 0
+	var maxMemoryBytes int64
 	if memoryGB > 10 {
 		maxMemoryBytes = int64(memoryGB-2) << 30 // 超过10G内存的允许剩余2G内存
 	} else {
diff --git a/internal/utils/writers/writer_rate_limit.go b/internal/utils/writers/writer_rate_limit.go
index 8cb4fe0..101a196 100644
--- a/internal/utils/writers/writer_rate_limit.go
+++ b/internal/utils/writers/writer_rate_limit.go
@@ -85,7 +85,7 @@ func (this *RateLimitWriter) write(p []byte) (n int, err error) {
 		this.written += n
 
 		if this.written >= this.rateBytes {
-			var duration = 1*time.Second - time.Now().Sub(this.before)
+			var duration = 1*time.Second - time.Since(this.before)
 			if duration > 0 {
 				time.Sleep(duration)
 			}
diff --git a/internal/waf/captcha_validator.go b/internal/waf/captcha_validator.go
index f90bd92..e327af4 100644
--- a/internal/waf/captcha_validator.go
+++ b/internal/waf/captcha_validator.go
@@ -108,10 +108,10 @@ func (this *CaptchaValidator) show(actionConfig *CaptchaAction, req requests.Req
 		lang = "en-US"
 	}
 
-	var msgTitle = ""
-	var msgPrompt = ""
-	var msgButtonTitle = ""
-	var msgRequestId = ""
+	var msgTitle string
+	var msgPrompt string
+	var msgButtonTitle string
+	var msgRequestId string
 
 	switch lang {
 	case "en-US":
diff --git a/internal/waf/checkpoints/cc.go b/internal/waf/checkpoints/cc.go
index 1399133..b2e37db 100644
--- a/internal/waf/checkpoints/cc.go
+++ b/internal/waf/checkpoints/cc.go
@@ -40,14 +40,9 @@ func (this *CCCheckpoint) RequestValue(req requests.Request, param string, optio
 		period = 7 * 86400
 	}
 
-	v, _ := options["userType"]
-	userType := types.String(v)
-
-	v, _ = options["userField"]
-	userField := types.String(v)
-
-	v, _ = options["userIndex"]
-	userIndex := types.Int(v)
+	var userType = types.String(options["userType"])
+	var userField = types.String(options["userField"])
+	var userIndex = types.Int(options["userIndex"])
 
 	if param == "requests" { // requests
 		var key = ""
diff --git a/internal/waf/rule.go b/internal/waf/rule.go
index 976f9ab..6bed948 100644
--- a/internal/waf/rule.go
+++ b/internal/waf/rule.go
@@ -23,7 +23,7 @@ import (
 	"strings"
 )
 
-var singleParamRegexp = regexp.MustCompile("^\\${[\\w.-]+}$")
+var singleParamRegexp = regexp.MustCompile(`^\${[\w.-]+}$`)
 
 // Rule
 type Rule struct {
diff --git a/internal/waf/waf_manager.go b/internal/waf/waf_manager.go
index a67d874..59eac4c 100644
--- a/internal/waf/waf_manager.go
+++ b/internal/waf/waf_manager.go
@@ -45,7 +45,7 @@ func (this *WAFManager) UpdatePolicies(policies []*firewallconfigs.HTTPFirewallP
 // FindWAF 查找WAF
 func (this *WAFManager) FindWAF(policyId int64) *WAF {
 	this.locker.RLock()
-	w, _ := this.mapping[policyId]
+	var w = this.mapping[policyId]
 	this.locker.RUnlock()
 	return w
 }