<%
  require 'cgi'
  require 'net/http'

  # Replace the publisher identifier line with your publisher ID, available on line 4 of the PHP script
  # on https://www.google.com/adsense/mobile-settings#section=2.

  client_id = "pub-REPLACEME"

  def fetchurl(url_str, user_agent_param = nil, limit=10)
    raise "Too many redirects" if limit <= 0 
    user_agent = user_agent_param || ""
    uri = URI.parse(url_str)
    http = Net::HTTP.new(uri.host,uri.port)
    http.open_timeout = 3
    http.read_timeout = 3
    response = http.get("#{uri.path}?#{uri.query}", {"User-Agent"=>user_agent})
    case response
      when Net::HTTPSuccess     then 
        return response.body
    when Net::HTTPRedirection then 
        return fetchurl(response['location'], user_agent, limit - 1)
    else 
        return response.error!
    end
  end


   google_dt = Time.now.to_i
   google_scheme = request.ssl? ? "https://" : "http://"
   google_host = CGI.escape(google_scheme + request.host)

   # allow a user agent to be passed in on the query string for
   # testing purposes
   user_agent = (request.params['user_agent'][0] rescue nil) || request.user_agent

   google_ad_url = "http://pagead2.googlesyndication.com/pagead/ads?" +
      "ad_type=text" +
      "&channel=" +
      "&client=ca-mb-#{client_id}" +
      "&dt=#{google_dt}" +
      "&format=mobile_single" +
      "&host=#{google_host}" +
      "&ip="+ CGI.escape(request.remote_ip.to_s) +
      "&markup=xhtml" + 
      "&output=xhtml" +
      "&ref="+ CGI.escape(headers['HTTP_REFERER'] || '') + 
      "&url="+google_host + CGI.escape(request.request_uri) +
      "&useragent="+ CGI.escape(user_agent);

      google_ad_output = fetchurl(google_ad_url)
%>

<%= google_ad_output %>