rails的SEO优化资料

def initialize(options={})
      @default_host, @sitemaps_host, @yield_sitemap, @sitemaps_path, @adapter, @verbose, @protect_index, @sitemap_index, @added_default_links, @created_group, @sitemap = nil

      options = SitemapGenerator::Utilities.reverse_merge(options,
        :include_root => true,
        :include_index => false,
        :filename => :sitemap,
        :search_engines => {
          :google         => "http://www.google.com/webmasters/tools/ping?sitemap=%s",
          :bing           => "http://www.bing.com/ping?sitemap=%s"
        },
        :create_index => :auto,
        :compress => true,
        :max_sitemap_links => SitemapGenerator::MAX_SITEMAP_LINKS
      )
      options.each_pair { |k, v| instance_variable_set("@#{k}".to_sym, v) }

      # If an index is passed in, protect it from modification.
      # Sitemaps can be added to the index but nothing else can be changed.
      if options[:sitemap_index]
        @protect_index = true
      end
    end