可以在缓存条件里设置Expires Header

internal/utils/time.go

@@ -27,3 +27,15 @@ func UnixTime() int64 {
 func UnixTimeMilli() int64 {
 	return unixTimeMilli
 }
+
+// GMTUnixTime 计算GMT时间戳
+func GMTUnixTime(timestamp int64) int64 {
+	_, offset := time.Now().Zone()
+	return timestamp - int64(offset)
+}
+
+// GMTTime 计算GMT时间
+func GMTTime(t time.Time) time.Time {
+	_, offset := time.Now().Zone()
+	return t.Add(-time.Duration(offset) * time.Second)
+}

internal/utils/time_test.go

@@ -11,3 +11,11 @@ func TestUnixTime(t *testing.T) {
 		time.Sleep(1 * time.Second)
 	}
 }
+
+func TestGMTUnixTime(t *testing.T) {
+	t.Log(GMTUnixTime(time.Now().Unix()))
+}
+
+func TestGMTTime(t *testing.T) {
+	t.Log(GMTTime(time.Now()))
+}