feat: geoip

pkg/geoip/example/main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"net/netip"
+
+	"galaxy/geoip"
+)
+
+func main() {
+	resolver, err := geoip.Open("/srv/geoip/GeoLite2-Country.mmdb")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer func() {
+		if err := resolver.Close(); err != nil {
+			log.Fatal(err)
+		}
+	}()
+
+	country, err := resolver.Country(netip.MustParseAddr("81.2.69.160"))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println(country)
+
+	fromString, err := resolver.CountryString("203.0.113.10")
+	switch {
+	case err == nil:
+		fmt.Println(fromString)
+	case errors.Is(err, geoip.ErrCountryNotFound):
+		// Fail open: keep request processing and treat the country as unknown.
+	default:
+		log.Fatal(err)
+	}
+}