Module: WiFiLocation

Defined in:
lib/wifi_location.rb

Constant Summary collapse

VERSION = 
'0.0.4'

Class Method Summary collapse

Class Method Details

.location(wifi_towers = self.wifi_towers) ⇒ Object 



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# File 'lib/wifi_location.rb', line 29

def self.location(wifi_towers=self.wifi_towers)
  uri = URI.parse 'http://www.google.com/loc/json'
  query = {
    :version => '1.1.0',
    :host => 'maps.google.com',
    :request_address => true,
    :address_language => ENV['LANG'] ? ENV['LANG'].scan(/([^\.]+)/)[0][0] : 'en_US',
    :wifi_towers => wifi_towers.map{|tower| {:mac_address => tower['bssid'], :signal_strength => tower['signal'], :age => 0} }
  }.to_json
  headers = {'Content-Type' => 'application/json'}
  res = Net::HTTP.start(uri.host, uri.port).request(Net::HTTP::Post.new(uri.request_uri, headers), query)
  raise "Response Error (#{res.code})" unless res.code.to_i == 200
  JSON.parse(res.body)['location']
end

.wifi_towers ⇒ Object 



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# File 'lib/wifi_location.rb', line 9

def self.wifi_towers
  case RUBY_PLATFORM
  when /darwin/
    lines = `/System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport -s`.split(/[\r\n]/)
    lines.shift
    lines.map{|i|
      a = i.scan(/[^\s]+/)
      {'bssid' => a[1], 'signal' => a[2].to_i}
    }
  when /linux/
    lines = `iwlist wlan0 scan`.split(/[\r\n]/)
    addrs = []
    lines.each do |line|
      addrs.push({'bssid' => line.split(/\s+/).last, 'signal' => 8}) if line =~ /Address: /
      addrs.last['signal'] = line.scan(/Signal level[:=](\-?\d+)/)[0][0].to_i rescue next if line =~ /Signal level[:=]/
    end
    addrs
  end
end