amazon rating scraping

class Scraper
  def self.scrape_reviewer_profile_url
    User.find_each do |user|
      next unless user.amazon_profile_url || !user.amazon_profile_url.blank?

      begin
        browser = Watir::Browser.new :firefox
        browser.goto user.amazon_profile_url
        sleep 2
        browser.span(class: 'a-expander-prompt').click
        data = Nokogiri::HTML(browser.html)
        result =  data.css('a.top-reviewer-link div.a-row span.a-size-base')
                  .text.sub('#', '')

        user.update_attribute(:amazon_reviewer_rank, result)
        browser.close
      rescue Exception => e
        puts "--------------"
        puts e
        puts "could not scrap page for user ##{user.id}"
        puts "--------------"
        browser.close if browser
        next
      end
    end
  end
end