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package main
import (
"encoding/json"
"fmt"
"log"
"net"
"net/http"
"strconv"
"github.com/oschwald/geoip2-golang"
)
type geodb struct {
db *geoip2.Reader
}
func floatToString(num float64) string {
return strconv.FormatFloat(num, 'f', 6, 64)
}
func (g *geodb) getRecordForIP(ipstr string) *geoip2.City {
ip := net.ParseIP(ipstr)
record, err := g.db.City(ip)
if err != nil {
log.Fatal(err)
}
return record
}
type jsonHandler struct {
geoipdb *geodb
}
func (jh *jsonHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
ip, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
log.Fatal(err)
}
netIP := net.ParseIP(ip)
ipstr := netIP.String()
record := jh.geoipdb.getRecordForIP(ipstr)
data := map[string]string{
"ip": ipstr,
"cc": record.Country.IsoCode,
"city": record.City.Names["en"],
"lat": floatToString(record.Location.Latitude),
"lon": floatToString(record.Location.Longitude),
}
dataJSON, _ := json.Marshal(data)
fmt.Fprintf(w, string(dataJSON))
}
type txtHandler struct {
geoipdb *geodb
}
func (th *txtHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
ip, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
log.Fatal(err)
}
netIP := net.ParseIP(ip)
ipstr := netIP.String()
record := th.geoipdb.getRecordForIP(ipstr)
fmt.Fprintf(w, "Your IP: %s\n", ipstr)
fmt.Fprintf(w, "Your Country: %s\n", record.Country.IsoCode)
fmt.Fprintf(w, "Your City: %s\n", record.City.Names["en"])
fmt.Fprintf(w, "Your Coordinates: %s, %s\n",
floatToString(record.Location.Latitude),
floatToString(record.Location.Longitude))
}
func main() {
db, err := geoip2.Open("/var/lib/GeoIP/GeoLite2-City.mmdb")
if err != nil {
log.Fatal(err)
}
defer db.Close()
geoipdb := geodb{db}
mux := http.NewServeMux()
jh := &jsonHandler{&geoipdb}
mux.Handle("/json", jh)
th := &txtHandler{&geoipdb}
mux.Handle("/", th)
log.Println("Listening...")
http.ListenAndServe(":9001", mux)
}
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