    # File lib/plugins/w3mimg.rb, line 10
    def get_icon_path(s)
      FileUtils.mkdir_p(config.plugins.notify_send.icon_cache_dir) unless File.exist?(config.plugins.notify_send.icon_cache_dir)
      cache_file = "%s/%s%s" % [  config.plugins.notify_send.icon_cache_dir,
                                  s.user.screen_name,
                                  File.extname(s.user.profile_image_url)  ]
      if !File.exist?(cache_file) || (File.atime(cache_file) + 24*60*60) < Time.now
        File.open(cache_file, "wb") do |f|
          begin
            http_class = Net::HTTP
            unless config.proxy.host.nil? or config.proxy.host.empty?
              http_class = Net::HTTP::Proxy(config.proxy.host,
                                            config.proxy.port,
                                            config.proxy.user_name,
                                            config.proxy.password)
            end
            uri = URI.parse(URI.escape(s.user.profile_image_url))
            image = http_class.get(uri.host, uri.path, uri.port)
            rimage = Magick::Image.from_blob(image).first
            rimage = rimage.resize_to_fill(48, 48)
            f << rimage.to_blob
          rescue Net::ProtocolError, Magick::ImageMagickError
            return nil
          end
        end
      end
      cache_file
    end