A MaxMind® GeoIP microservice and lookup tool written in GO, and pulling ideas from:

• https://github.com/klauspost/geoip-service
• https://github.com/twisted1919/geoip-go
• https://github.com/oschwald/geoip2-golang
• https://github.com/mitchellh/cli

Note: this project is not affiliated with MaxMind, and only provides a tool to facilitate data lookup from maxmind specific geoip databases.

$ go get -u github.com/rabbitt/maxmind
$ cd $GOPATH/src/github.com/rabbitt/maxmind
$ make bootstrap
$ make maxmind

• GeoLite2-City.mmdb from MaxMind

This package provides a single binary maxmind providing both, lookup, and server functionality. Basic help information can be gleaned by typing maxmind --help. More specific help information can be found by issuing --help to the relevant subcommand.

To list GeoIP data for one, or more, IPs, use the following:

$ maxmind lookup -f <path to GeoLite2-City.mmdb> 123.123.123.123 8.8.8.8 8.8.4.4

[ 123.123.123.123 ]---------------------->
  Continent:      [Asia (AS)]
  Country:        [China (CN)]
  Subdivision:    [Beijing (BJ)]
  City:           [Beijing]
  Location:
    Coordinates:  [39.9289, 116.3883 (20)]
    Timezone:     [Asia/Shanghai]

[         8.8.8.8 ]---------------------->
  Continent:      [North America (NA)]
  Country:        [United States (US)]
  Location:
    Coordinates:  [37.7510, -97.8220 (1000)]

[         8.8.4.4 ]---------------------->
  Continent:      [North America (NA)]
  Country:        [United States (US)]
  Location:
    Coordinates:  [37.7510, -97.8220 (1000)]

The server has three routes that it listens for requests on:

• GET /ping - responds with 200 and pong
• HEAD /ping - responds with 200 only
• GET /ip/:ip - responds with geodata (as JSON) for the requested ip

Configuration can be passed on the command line, or put into a JSON encoded file using the same long form names as those of the options listed below:

-c, --config.file

Path to JSON encoded file containing server configuration.

-i, --sever.ip

IP Address for the service to bind to (default: 127.0.0.1)

-p, --server.port

Port for service to bind to (default: 8000)

-f, --database.file

Path to the MaxMind database file (default: /var/lib/maxminddb/GeoLite2-City.mmdb)

-t, --cache.ttl

How long to rcache response data before refetching it from the database (0 disables, default: 3600.0)

-T, --worker.threads

Number of worker threads to handle incoming requests (default: Number of CPU processes)

Starting up requires, at a minimum, the path to the MaxMind database file:

$ bin/maxmind server -f /var/lib/maxminddb/GeoLite2-City.mmdb
INFO: Configuration:
INFO:     Bind Address:   [ 127.0.0.1:8000 ]
INFO:     Cache TTL:      [ 3600.00 seconds ]
INFO:     Worker Threads: [ 8 ]
INFO:     Database File:  [ /private/var/lib/maxminddb/GeoLite2-City.mmdb ]
INFO: Caching enabled; will cache requests for 3600.00 seconds
INFO: Listening on 127.0.0.1:8000 ...

Example output from a client request for ip 123.123.123.123:

# $ curl -s http://127.0.0.1:8000/ip/123.123.123.123 | jq
{
  "status": "success",
  "message": "OK",
  "data": {
    "city": {
      "name": "Beijing"
    },
    "continent": {
      "code": "AS",
      "name": "Asia"
    },
    "country": {
      "iso_code": "CN",
      "name": "China"
    },
    "location": {
      "accuracy_radius": 20,
      "latitude": 39.9289,
      "longitude": 116.3883,
      "time_zone": "Asia/Shanghai"
    },
    "postal": {},
    "registered_country": {
      "iso_code": "CN",
      "name": "China"
    },
    "represented_country": {},
    "subdivisions": [
      {
        "iso_code": "BJ",
        "name": "Beijing"
      }
    ],
    "subdivision": {
      "iso_code": "BJ",
      "name": "Beijing"
    },
    "traits": {}
  }
}