how can i use it with a pool like mysql

[fancyecommerce]

func getIpInfo(ipStr string) (string, string, string, string){
    ipDb, err := geoip2.Open("/www/test/ip/GeoLite2-City_20180327/GeoLite2-City.mmdb")
    if err != nil {
            log.Fatal(err)
    }
    defer ipDb.Close()
    // If you are using strings that may be invalid, check that ip is not nil
    ip := net.ParseIP(ipStr)
    record, err := ipDb.City(ip)
    if err != nil {
        log.Fatal(err)
    }
    return record.Country.IsoCode, record.Country.Names["en"], record.Subdivisions[0].Names["en"], record.City.Names["en-US"]
}

every time use it , it will reopen db connect, them close connect, how can i use it with a pool ip db?

[oschwald]

You can just share the geoip.Reader. There is no reason to open and close it each time.