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=begin
host_ip_info.rb (http://gist.github.com/169374)
 
Copyright (c) 2009 Jason L Perry
 
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.
 
=end
 
require "net/http"
require "yaml"
 
# A thin wrapper for the hostip.info API
class HostIPInfo
  
  # Request geolocation for the given IP address.
  def self.[] ip
    begin
      timeout(2) { @response = Net::HTTP.get_response("api.hostip.info", "/get_html.php?ip=#{ip}&position=true") }
      Response.new *YAML::load(@response.body).values_at("City", "Country", "Latitude", "Longitude")
    rescue Timeout::Error
      Response.new
    end
  end
 
  class Response < Struct.new(:city, :country, :latitude, :longitude)
    def to_hash
      Hash[*members.zip(values).flatten]
    end
  end
end
 
if $0 == __FILE__
  require "test/unit"
  require "rubygems"
  require "mocha"
 
  class HostIPInfoTest < Test::Unit::TestCase
 
    def setup
     @http_mock = mock('Net::HTTPResponse')
     @http_mock.stubs :code         => "200",
                      :message      => "OK",
                      :content_type => "text/html",
                      :body         => "Country: UNITED STATES (US)\nCity: St. Petersburg, FL\nLatitude: 27.758\nLongitude: -82.6421"
 
      Net::HTTP.stubs(:get_response).returns(@http_mock)
    end
 
    def test_city
      assert_equal "St. Petersburg, FL", HostIPInfo["127.0.0.1"].city
    end
 
    def test_country
      assert_equal "UNITED STATES (US)", HostIPInfo["127.0.0.1"].country
    end
 
    def test_latitude
      assert_equal 27.758, HostIPInfo["127.0.0.1"].latitude
    end
 
    def test_longitude
      assert_equal -82.6421, HostIPInfo["127.0.0.1"].longitude
    end
    
    def test_to_hash
      hash = {
        "city"      => "St. Petersburg, FL",
        "country"   => "UNITED STATES (US)",
        "latitude"  => 27.758,
        "longitude" => -82.6421
      }
      assert_equal hash, HostIPInfo["127.0.0.1"].to_hash
    end
 
  end
end