Class: Hancock::Goto::Middleware

Inherits:
Object
  • Object
show all
Includes:
Rack::Utils
Defined in:
lib/hancock/goto/middleware.rb

Constant Summary collapse

ATTRS = 
{
  disabled:       'data-hancock-goto-disabled',
  add_nofollow:   'data-hancock-goto-add-nofollow',
  add_noindex:    'data-hancock-goto-add-noindex',
  add_noreferrer: 'data-hancock-goto-add-noreferrer',
  add_noopener:   'data-hancock-goto-add-noopener',
  del_attrs:      'data-hancock-goto-del-attrs'
}
REL_ATTRS = 
ATTRS.dup

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/hancock/goto/middleware.rb', line 23

def initialize(app, options = {})
  @app = app
  self
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/hancock/goto/middleware.rb', line 28

def call(env)
  status, headers, response = @app.call(env)
  headers = HeaderHash.new(headers)

  if should_process?(status, headers, env)
    begin
      content = extract_content(response)
      if Hancock::Goto.config.href_attr_regex and content =~ Hancock::Goto.config.href_attr_regex
        doc = ::Nokogiri::HTML(content)

        doc.css(Hancock::Goto.config.css_selector).each do |a|
          if (!a[ATTRS[:disabled]].blank? and !["0", "false", "no"].include?(a[ATTRS[:disabled]]))
            del_attrs(a)
            next
          end
          _href = a['href']
          if _href =~ Hancock::Goto.config.href_regex
            begin
              _host = Addressable::URI.parse(_href).host
              unless Hancock::Goto.config.excluded_hosts.include?(_host)
                a['href'] = Rails.application.routes.url_helpers.hancock_goto_path(url: _href)
                a['target'] = '_blank' if a['target'].blank?
                set_rel_attribute(a)
                del_attrs(a)
              end
            rescue
            end
          end
        end

        content = doc.to_html
        headers['content-length'] = bytesize(content).to_s
        response = [content]
      end
    rescue Exception => ex
      # puts ex.message
      # puts ex.backtrace
    end
  end

  [status, headers, response]
end