func PostVisitorLogin(c *gin.Context) {
    ipcity:=tools.ParseIp(c.ClientIP())
    ipcity.CountryName+ipcity.RegionName+ipcity.CityName
}

package tools

import (
    "github.com/ipipdotnet/ipdb-go"
)

func ParseIp(myip string)(*ipdb.CityInfo) {
    db, err := ipdb.NewCity("./config/city.free.ipdb")
    if err != nil {
        return nil
    }
    db.Reload("./config/city.free.ipdb")
    c,err :=db.FindInfo(myip, "CN")
    if err != nil {
        return nil
    }
    return c
}