golang使用geoip2获取ip归属地

go get github.com/oschwald/geoip2-golang

下载GeoIP2-City.mmdb

https://dev.maxmind.com/geoip/geolite2-free-geolocation-data

main.go

package main

import (
	"fmt"
	"log"
	"net"

	"github.com/oschwald/geoip2-golang"
)

func main() {
	db, err := geoip2.Open("GeoIP2-City.mmdb")
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()
	// If you are using strings that may be invalid, check that ip is not nil
	ip := net.ParseIP("81.2.69.142")
	record, err := db.City(ip)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("Portuguese (BR) city name: %v\n", record.City.Names["pt-BR"])
	if len(record.Subdivisions) > 0 {
		fmt.Printf("English subdivision name: %v\n", record.Subdivisions[0].Names["en"])
	}
	fmt.Printf("Russian country name: %v\n", record.Country.Names["ru"])
	fmt.Printf("ISO country code: %v\n", record.Country.IsoCode)
	fmt.Printf("Time zone: %v\n", record.Location.TimeZone)
	fmt.Printf("Coordinates: %v, %v\n", record.Location.Latitude, record.Location.Longitude)
	// Output:
	// Portuguese (BR) city name: Londres
	// English subdivision name: England
	// Russian country name: Великобритания
	// ISO country code: GB
	// Time zone: Europe/London
	// Coordinates: 51.5142, -0.0931
}