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module/background/background.go

@@ -0,0 +1,14 @@
+package background
+
+import (
+	"github.com/robfig/cron"
+)
+
+var c *cron.Cron
+
+// RegisterCron - register all cron
+func RegisterCron() {
+	c = cron.New()
+	c.AddFunc("@daily", downloadGeoDB)
+	c.Start()
+}

module/geoip/geoip.go

@@ -0,0 +1,41 @@
+package geoip
+
+import (
+	"net"
+
+	geoip2 "github.com/oschwald/geoip2-golang"
+)
+
+var db *geoip2.Reader
+
+// NewReader -
+func NewReader() (*geoip2.Reader, error) {
+	var err error
+	db, err = geoip2.Open("/data/GeoLite2-City.mmdb")
+	return db, err
+}
+
+// GeoStruct -
+type GeoStruct struct {
+	City     string `json:"city"`
+	Timezone string `json:"timezone"`
+	Location struct {
+		Latitude  float64 `json:"latitude"`
+		Longitude float64 `json:"longtitude"`
+	} `json:"location"`
+}
+
+// QueryGEO -
+func QueryGEO(input string) (geo *GeoStruct, err error) {
+	ip := net.ParseIP(input)
+	record, err := db.City(ip)
+	if err != nil {
+		return
+	}
+	geo = &GeoStruct{}
+	geo.City = record.City.Names["en"]
+	geo.Timezone = record.Location.TimeZone
+	geo.Location.Latitude = record.Location.Latitude
+	geo.Location.Longitude = record.Location.Longitude
+	return
+}