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# GeoIP2 Reader for Go #
[](https://travis-ci.org/oschwald/geoip2-golang)
[](https://godoc.org/github.com/oschwald/geoip2-golang)
This library reads MaxMind [GeoLite2](http://dev.maxmind.com/geoip/geoip2/geolite2/)
and [GeoIP2](http://www.maxmind.com/en/geolocation_landing) databases.
This library is built using
[the Go maxminddb reader](https://github.com/oschwald/maxminddb-golang).
All data for the database record is decoded using this library. If you only
need several fields, you may get superior performance by using maxminddb's
`Lookup` directly with a result struct that only contains the required fields.
(See [example_test.go](https://github.com/oschwald/maxminddb-golang/blob/master/example_test.go)
in the maxminddb repository for an example of this.)
## Installation ##
```
go get github.com/oschwald/geoip2-golang
```
## Usage ##
[See GoDoc](http://godoc.org/github.com/oschwald/geoip2-golang) for
documentation and examples.
## Example ##
```go
package main
import (
"fmt"
"github.com/oschwald/geoip2-golang"
"log"
"net"
)
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"])
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
}
```
## Testing ##
Make sure you checked out test data submodule:
```
git submodule init
git submodule update
```
Execute test suite:
```
go test
```
## Contributing ##
Contributions welcome! Please fork the repository and open a pull request
with your changes.
## License ##
This is free software, licensed under the ISC license.
|
