根据header的Timezone获取时区

_const/enum/timezone_e/tz.go

 package timezone_e
 
-import "time"
+import (
+	"regexp"
+	"strconv"
+	"time"
+)
 
 type Timezone int
 
@@ -19,3 +23,15 @@ var TimezoneLocMap = map[Timezone]*time.Location{
 	TimezoneBeijing: BeijingTimezoneLoc,
 	TimezoneKSA:     KSATimezoneLoc,
 }
+
+// 根据header的Timezone获取时区
+// return nil: 无法解析
+func GetFixedTimezone(tz string) *time.Location {
+	re := regexp.MustCompile(`\d+`)
+	timeZone := re.FindString(tz)
+	offset, _ := strconv.Atoi(timeZone)
+	if offset <= 0 {
+		return nil
+	}
+	return time.FixedZone("CST", offset*3600)
+}