def crawl(lin,level)
  begin
    if ((level <= 4) and !(lin.include? "javascript") and !(lin.to_s.include? "https") and (lin.to_s.include? "http://www.mysite.it") and (lin.include? "http") and filter_by_accent(lin))
      puts "visiting link: " + lin
      page = @agent.get(lin)
      if (page.parser.xpath("//*[@id=\"headerTempoConsegna\"]/text()").to_s.include?("Tempo di consegna medio"))
        @crawler.getDataFrom(lin,page)
      else
        page.links.each { |a|
          crawl(a.href.to_s,(level+1))
        }


      end

    end

  rescue Net::HTTPNotFound => e
      puts "Exception raised... continue on another link"

  end
end