gistfile1.rb

def render_esi(path)
		if Rails.env == 'development'
 			div_id = Digest::MD5.hexdigest(path + rand.to_s)
			out = content_tag(:div, :id => div_id) do '' end
			out += content_tag(:script, :type => 'text/javascript') do
				'$.ajax({ type:"GET", url:"' + path + '", dataType:"html", success:function(html) { $("#' + div_id + '").html(html)
 } });'
			end
		else
			'<esi:include src="' + path + '" />'
		end
	end