call_geocoding 구현

crawling.rake

  api_key = "당신의 다음 Open API 키"
  def call_geocoding(address)
    begin
      uri = "http://apis.daum.net/local/geo/addr2coord?apikey=#{api_key}&output=xml&q=#{URI::encode(address)}"
      doc = Nokogiri::XML(open(uri))
    rescue OpenURI::HTTPError => the_error
      the_status = the_error.io.status[0]
      puts "[#{the_status}]"
    else
      if doc.xpath("//lng[1]").text == "" then
        puts "#{address} failed!"
        return call_geocoding(address.gsub(/\s.*$/, ""))
      end
      return doc
    end
  end