I want to extract a user country name from visitors' IP addresses.

I could get the IP address with remote_开发者_高级运维ip. But what could be the easiest way to get the country name?

It doesn't have to be super accurate. Any ruby library (gem or plugin) to do this?

I want an simple and easy solution for this.

---

You can use geoip gem.

environment.rb

config.gem 'geoip'

Download GeoIP.dat.gz from http://www.maxmind.com/app/geolitecountry. unzip the file. The below assumes under #{RAILS_ROOT}/db dir.

@geoip ||= GeoIP.new("#{RAILS_ROOT}/db/GeoIP.dat")    
remote_ip = request.remote_ip 
if remote_ip != "127.0.0.1" #todo: check for other local addresses or set default value
  location_location = @geoip.country(remote_ip)
  if location_location != nil     
    @model.country = location_location[2]
  end
end

---

You can also use "Geocoder"

It will just make you life easier. Put the following line in your Gemfile and issue the bundle install command

gem 'geocoder'

Using this Gem, you can easily get the country, ip or even city of the originating IP. See an example below

request.ip  # =>    "182.185.141.75"
request.location.city   # =>    ""
request.location.country    # =>    "Pakistan"

---

I'm using this one-liner:

locale = Timeout::timeout(5) { Net::HTTP.get_response(URI.parse('http://api.hostip.info/country.php?ip=' + request.remote_ip )).body } rescue "US"

---

The simplest is to use an existing web service for this.

There are plugins that let you do much more, including making your models geolocation-aware (geokit-rails) automatically, but if all you need is a country code for example, simply sending an HTTP Get to http://api.hostip.info/country.php (there are other services but this one does not require an API key) will return it, e.g. :

Net::HTTP.get_response(URI.parse('http://api.hostip.info/country.php'))
=> US

Or polling http://api.hostip.info/ will return a full XML response with city, latitude, longitude, etc.

Be aware that the results you get are not 100% accurate. For example, right now I'm in France but reported as in Germany. This will be the case for pretty much any IP-based service.

---

One service you could use to do this is my own, https://ipinfo.io. It gives you country code and a bunch of other details:

$ curl ipinfo.io
{
  "ip": "24.6.61.239",
  "hostname": "c-24-6-61-239.hsd1.ca.comcast.net",
  "city": "Mountain View",
  "region": "California",
  "country": "US",
  "loc": "37.3845,-122.0881",
  "org": "AS7922 Comcast Cable Communications, LLC",
  "postal": "94040"
}

If you just want the country you can get that by requesting /country

$ curl ipinfo.io/country
US

You can then map from a country code to a name using the data from http://country.io, or using the example at http://ipinfo.io/developers/full-country-names

---

The geoip gem no longer works with the new MaxMind databases. There is a new gem that does this, MaxMind-DB-Reader-ruby.

Simply download the City or Country binary, gzipped databases from MaxMind, unzip, and use the following sort of code:

require 'maxmind/db'

reader = MaxMind::DB.new('GeoIP2-City.mmdb', mode: MaxMind::DB::MODE_MEMORY)

# you probably want to replace 1.1.1.1 with  request.remote_ip
# or request.env['HTTP_X_FORWARDED_FOR']
ip_addr = '1.1.1.1'
record = reader.get(ip_addr)
if record.nil?
  puts '#{ip_addr} was not found in the database'
else
  puts record['country']['iso_code']
  puts record['country']['names']['en']
end

reader.close

Adapt based on your needs. I created a method in an initializer which I can call as necessary.

---

I've just published a gem for the IPLocate.io API which I created.

Super easy, no databases to download, and 1,500 free requests per day:

require 'iplocate'

# Look up an IP address
results = IPLocate.lookup("8.8.8.8")

# Or with an API key
results = IPLocate.lookup("8.8.8.8", "abcdef")

results["country"]
# "United States"

results["country_code"]
# "US"

results["org"]
# "Google LLC"

results.inspect
# {
#   "ip"=>"8.8.8.8",
#   "country"=>"United States",
#   "country_code"=>"US",
#   "city"=>nil,
#   "continent"=>"North America",
#   "latitude"=>37.751,
#   "longitude"=>-97.822,
#   "time_zone"=>nil,
#   "postal_code"=>nil,
#   "org"=>"Google LLC",
#   "asn"=>"AS15169"
# }  

No Gem

It can also be used without a gem by just using Ruby's Net::HTTP and URI:

response = Net::HTTP.get( URI.parse( "https://www.iplocate.io/api/lookup/8.8.8.8" ) )

The request will return JSON so you can parse it and access it as follows:

country = JSON.parse( response )["country"]
# => "US"

---

You can try Yandex locator gem, service returns longitude, latitude and precision.

conn = YandexLocator::Client.new
result = conn.lookup(ip: "109.252.52.39")
# => {"position"=>{"altitude"=>0.0, "altitude_precision"=>30.0, "latitude"=>55.75395965576172, "longitude"=>37.62039184570312, "precision"=>100000.0, "type"=>"ip"}}

---

Try the IP2Location Ruby

https://github.com/ip2location/ip2location-ruby

Pre-requisite

Download the free LITE database from http://lite.ip2location.com/ and use below.

Install

gem install ip2location_ruby

Usage

require 'ip2location_ruby'

i2l = Ip2location.new.open("./data/IP-COUNTRY-SAMPLE.BIN")
record = i2l.get_all('8.8.8.8')

print 'Country Code: ' + record.country_short + "\n"
print 'Country Name: ' + record.country_long + "\n"
print 'Region Name: ' + record.region + "\n"
print 'City Name: ' + record.city + "\n"
print 'Latitude: '
print record.latitude
print "\n"
print 'Longitude: '
print record.longitude
print "\n"
print 'ISP: ' + record.isp + "\n"
print 'Domain: ' + record.domain + "\n"
print 'Net Speed: ' + record.netspeed + "\n"
print 'Area Code: ' + record.areacode + "\n"
print 'IDD Code: ' + record.iddcode + "\n"
print 'Time Zone: ' + record.timezone + "\n"
print 'ZIP Code: ' + record.zipcode + "\n"
print 'Weather Station Code: ' + record.weatherstationname + "\n"
print 'Weather Station Name: ' + record.weatherstationcode + "\n"
print 'MCC: ' + record.mcc + "\n"
print 'MNC: ' + record.mnc + "\n"
print 'Mobile Name: ' + record.mobilebrand + "\n"
print 'Elevation: '
print record.elevation
print "\n"
print 'Usage Type: ' + record.usagetype + "\n"

---

Here's a Ruby example calling the ipdata.co API.

It's fast and has reliable performance thanks to having 10 global endpoints each able to handle >10,000 requests per second!

This answer uses a 'test' API Key that is very limited and only meant for testing a few calls. Signup for your own Free API Key and get up to 1500 requests daily for development.

Replace 78.8.53.5 with any ip you want to look up

require 'rubygems' if RUBY_VERSION < '1.9'
require 'rest_client'

headers = {
  :accept => 'application/json'
}

response = RestClient.get 'https://api.ipdata.co/78.8.53.5?api-key=test', headers
puts response

That'd give you

{
    "ip": "78.8.53.5",
    "is_eu": true,
    "city": "G\u0142og\u00f3w",
    "region": "Lower Silesia",
    "region_code": "DS",
    "country_name": "Poland",
    "country_code": "PL",
    "continent_name": "Europe",
    "continent_code": "EU",
    "latitude": 51.6557,
    "longitude": 16.089,
    "asn": "AS12741",
    "organisation": "Netia SA",
    "postal": "67-200",
    "calling_code": "48",
    "flag": "https://ipdata.co/flags/pl.png",
    "emoji_flag": "\ud83c\uddf5\ud83c\uddf1",
    "emoji_unicode": "U+1F1F5 U+1F1F1",
    "carrier": {
        "name": "Netia",
        "mcc": "260",
        "mnc": "07"
    },
    "languages": [
        {
            "name": "Polish",
            "native": "Polski"
        }
    ],
    "currency": {
        "name": "Polish Zloty",
        "code": "PLN",
        "symbol": "z\u0142",
        "native": "z\u0142",
        "plural": "Polish zlotys"
    },
    "time_zone": {
        "name": "Europe/Warsaw",
        "abbr": "CEST",
        "offset": "+0200",
        "is_dst": true,
        "current_time": "2018-08-29T15:34:23.518065+02:00"
    },
    "threat": {
        "is_tor": false,
        "is_proxy": false,
        "is_anonymous": false,
        "is_known_attacker": false,
        "is_known_abuser": false,
        "is_threat": false,
        "is_bogon": false
    },
}

---

The gem geoip can be replaced with the new gem maxminddb. It support new MaxMind db format.

db = MaxMindDB.new('./GeoLite2-City.mmdb')
ret = db.lookup('74.125.225.224')

ret.found? # => true
ret.country.name # => 'United States'
ret.country.name('zh-CN') # => '美国'
ret.country.iso_code # => 'US'
ret.city.name(:fr) # => 'Mountain View'
ret.subdivisions.most_specific.name # => 'California'
ret.location.latitude # => -122.0574