Highcharts generate image from chart

gistfile1.rb

# To use this you will need:
# lazy_high_charts gem (I used version 1.4.3) - https://github.com/michelson/lazy_high_charts
# phantomJS installed on your machine - http://phantomjs.org/

# Responsible for convertion LazyHighChart object into image
# Receives LazyHighChart Object
  def render_chart(high_chart, image_format="png", options = {})
    options = options.select {|key, value| RENDER_OPTIONS.include?(key.to_s) }
    begin
      # First we will create file that contains json properties from our chart
      infile = Tempfile.new('options')
      infile.write(high_chart.full_options)
      infile.rewind
      
      # Create file where to store our image info
      outfile = Tempfile.new(%W(chart .#{image_format}))
      
      # Command that process image through phantomJS
      system_call = "phantomjs highcharts-convert.js -infile #{infile.path} -outfile #{outfile.path}"
      RENDER_OPTIONS.each do |key|
        system_call += " -#{key} #{options[key.to_sym]}" unless options[key.to_sym].nil?
      end
      silence_stream(STDOUT) do
        system system_call
      end
      outfile.close
      
      # Moving temporary File to fixed location
      FileUtils.mv(outfile.path, "/some_directory_where_you_want_your_file/")
      # returning image path
      return outfile.path.split("/").last
    ensure 
      infile.close
      infile.unlink
    end
  end