lib/nominatim.rb

   1 module Nominatim
   2   extend ActionView::Helpers::NumberHelper
   3
   4   def self.describe_location(lat, lon, zoom = nil, language = nil)
   5     zoom ||= 14
   6     language ||= http_accept_language.user_preferred_languages.join(',')
   7
   8     Rails.cache.fetch "/nominatim/location/#{lat}/#{lon}/#{zoom}/#{language}" do
   9       url = "http://nominatim.openstreetmap.org/reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{language}"
  10
  11       begin
  12         response = OSM::Timer.timeout(4) do
  13           REXML::Document.new(Net::HTTP.get(URI.parse(url)))
  14         end
  15       rescue Exception
  16         response = nil
  17       end
  18
  19       if response && result = response.get_text("reversegeocode/result")
  20         result.to_s
  21       else
  22         "#{number_with_precision(lat, :precision => 3)}, #{number_with_precision(lon, :precision => 3)}"
  23       end
  24     end
  25   end
  26 end