GeoIP

Elixir library to lookup the geographic location for a given IP address (or hostname, or Plug.Conn).

By default, the data is retrieved from freegeoip.net, but you are can optionally use your own freegeoip installation which is highly recommended for production environments.

The returned results are cached for an hour by default so that we don't hit the service unnecessarily, but this is configurable can be disabled using the config options (see below).

Installation

1. Add geoip to your list of dependencies in mix.exs:

def deps do
  [{:geoip, "~> 0.1"}]
end

2. Update your mix dependencies

mix deps.get

2. Ensure geoip is started before your application:

def application do
  [applications: [:geoip]]
end

Usage

You can pass in an IP address (as a string or a struct), hostname or a Plug.Conn struct to be looked up.

GeoIP.lookup("google.com")
#=> {:ok, %GeoIP.Location{city: "Mountain View", country_code: "US", country_name: "United States", ip: "172.217.4.78", latitude: 37.4192, longitude: -122.0574, metro_code: 807, region_code: "CA", region_name: "California", time_zone: "America/Los_Angeles", zip_code: "94043"}}

# Other examples:
GeoIP.lookup("8.8.8.8")
GeoIP.lookup({8, 8, 8, 8})
GeoIP.lookup(conn)

This returns {:ok, response} if the lookup is successful, {:error, %GeoIP.Error{reason: reason}} otherwise.

Configuration

You can change the freegeoip server that is used by specifying the value of the url option:

config :geoip, url: "https://geoip.example.com"

By default, the location results returned by the freegeoip server is cached for an hour. We can disable the cache by:

config :geoip, cache: false

Or to change the time limit of cached results:

config :geoip, cache_ttl_secs: 1800 # 30 mins

Determining your remote_ip when behind a proxy

If your application is running behind a proxy, we recommend using ajvondrak/remote_ip or something similar to override the remote_ip field of Plug.Conn. Due to the various different ways of determining the applications remote ip depending on your deployment environment, we leave this up to you to configure as appropriate.

License

The MIT License

Copyright (c) 2016-present Navin Peiris

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.