mirror of https://github.com/mpolden/echoip
134 lines
2.6 KiB
Go
134 lines
2.6 KiB
Go
package geo
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import (
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"math"
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"net"
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geoip2 "github.com/oschwald/geoip2-golang"
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)
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type Reader interface {
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Country(net.IP) (Country, error)
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City(net.IP) (City, error)
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ASN(net.IP) (ASN, error)
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IsEmpty() bool
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}
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type Country struct {
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Name string
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ISO string
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IsEU *bool
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}
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type City struct {
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Name string
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Latitude float64
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Longitude float64
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}
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type ASN struct {
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AutonomousSystemNumber uint
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AutonomousSystemOrganization string
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}
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type geoip struct {
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country *geoip2.Reader
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city *geoip2.Reader
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asn *geoip2.Reader
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}
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func Open(countryDB, cityDB string, asnDB string) (Reader, error) {
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var country, city, asn *geoip2.Reader
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if countryDB != "" {
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r, err := geoip2.Open(countryDB)
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if err != nil {
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return nil, err
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}
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country = r
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}
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if cityDB != "" {
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r, err := geoip2.Open(cityDB)
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if err != nil {
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return nil, err
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}
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city = r
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}
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if asnDB != "" {
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r, err := geoip2.Open(asnDB)
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if err != nil {
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return nil, err
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}
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asn = r
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}
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return &geoip{country: country, city: city, asn: asn}, nil
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}
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func (g *geoip) Country(ip net.IP) (Country, error) {
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country := Country{}
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if g.country == nil {
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return country, nil
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}
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record, err := g.country.Country(ip)
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if err != nil {
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return country, err
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}
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if c, exists := record.Country.Names["en"]; exists {
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country.Name = c
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}
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if c, exists := record.RegisteredCountry.Names["en"]; exists && country.Name == "" {
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country.Name = c
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}
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if record.Country.IsoCode != "" {
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country.ISO = record.Country.IsoCode
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}
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if record.RegisteredCountry.IsoCode != "" && country.ISO == "" {
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country.ISO = record.RegisteredCountry.IsoCode
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}
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isEU := record.Country.IsInEuropeanUnion || record.RegisteredCountry.IsInEuropeanUnion
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country.IsEU = &isEU
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return country, nil
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}
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func (g *geoip) City(ip net.IP) (City, error) {
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city := City{}
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if g.city == nil {
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return city, nil
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}
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record, err := g.city.City(ip)
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if err != nil {
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return city, err
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}
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if c, exists := record.City.Names["en"]; exists {
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city.Name = c
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}
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if !math.IsNaN(record.Location.Latitude) {
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city.Latitude = record.Location.Latitude
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}
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if !math.IsNaN(record.Location.Longitude) {
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city.Longitude = record.Location.Longitude
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}
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return city, nil
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}
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func (g *geoip) ASN(ip net.IP) (ASN, error) {
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asn := ASN{}
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if g.asn == nil {
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return asn, nil
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}
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record, err := g.asn.ASN(ip)
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if err != nil {
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return asn, err
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}
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if record.AutonomousSystemNumber > 0 {
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asn.AutonomousSystemNumber = record.AutonomousSystemNumber
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}
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if record.AutonomousSystemOrganization != "" {
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asn.AutonomousSystemOrganization = record.AutonomousSystemOrganization
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}
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return asn, nil
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}
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func (g *geoip) IsEmpty() bool {
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return g.country == nil && g.city == nil
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}
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