Production Images Download

production_images_download.rb

# В config/initializers/development.rb
#
# config.middleware.insert_before(::Rack::Lock, ::ProductionImagesDownload, "www.lookatme.ru")
class ProductionImagesDownload
  
  # Перехватывает отсутствующие картинки и пытается слить их с lookatme.ru
  def initialize(app, host)
    Rails.logger.debug "Production images downloader started"
    @app = app
    @host = host
    @path = (Rails.root+"/public").to_s
    @static = Rack::File.new(@path)
  end
  
  def call(env)
    req_path = env["PATH_INFO"]
    return @app.call(env) unless (req_path.index("/assets") == 0 || req_path.index("/images/hairvideo") == 0)
    
    if !File.exists?(@path + req_path)
      FileUtils.mkdir_p(File.dirname(@path + req_path))
      Rails.logger.debug "Downloading: #{req_path.inspect}"
      `curl 'http://#{@host}#{req_path}' -o '#{@path + req_path}' >/dev/null 2>/dev/null`
      Rails.logger.debug "Downloaded: #{req_path.inspect}"
    end
    @static.call(env)
  end
end