Class: CmsContentSweeper

Inherits:
ActionController::Caching::Sweeper
  • Object
show all
Defined in:
app/sweepers/cms_content_sweeper.rb

Instance Method Summary collapse

Instance Method Details

#after_destroy(record) ⇒ Object 



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# File 'app/sweepers/cms_content_sweeper.rb', line 8

def after_destroy(record)
  delete_all_cached_pages
end

#after_save(record) ⇒ Object 



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# File 'app/sweepers/cms_content_sweeper.rb', line 4

def after_save(record)
  delete_all_cached_pages
end

#delete_all_cached_pages ⇒ Object 



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# File 'app/sweepers/cms_content_sweeper.rb', line 12

def delete_all_cached_pages
  cache_dir = File.expand_path(Manage::CmsPagesController.page_cache_directory)
  public_dir = File.expand_path("#{Rails.root}/public")
  
  # this could throw Errno::ENOENT
  begin
    cache_dir = File.realpath cache_dir
    public_dir = File.realpath public_dir
  end
  
  begin
    if cache_dir == public_dir
      # expire home page
      expire_page controller: 'cms/content', action: 'show', content_path: nil
      
      # expire all other pages
      
      # original method is too slow for large sites:
      # CmsPage.select([ :id, :path ]).find_each do |page|
      #   expire_page controller: 'cms/content', action: 'show', content_path: page.path.split('/')
      # end
      
      # quicker method: remove entire directory trees when possible
      dangerous_names = [ 'assets', 'images', 'javascripts', 'media', 'stylesheets' ]
      home_page = CmsPage.find_by_path('')
      CmsPage.where(parent_id: home_page.id).each do |page|
        if dangerous_names.include?(page.path)
          # expire pages the old way
          Rails.logger.info "Expire tree #{path} using safe method"
          sub_page_paths(page).each do |path|
            expire_page controller: 'cms/content', action: 'show', content_path: path.split('/')
          end
        else
          # first clear this page
          expire_page controller: 'cms/content', action: 'show', content_path: page.path.split('/')
          
          # then attempt to remove entire directory tree, after sanity check
          path = File.expand_path(File.join(Manage::CmsPagesController.page_cache_directory, page.path))
          Dir.chdir Rails.root
          Dir.glob(Pathname.new(path).relative_path_from(Pathname.new(Rails.root)).to_s, File::FNM_CASEFOLD).each do |path|
            path = File.realpath(File.expand_path(path, Rails.root))
            if path && File.directory?(path) # could be nil if realpath threw an Errno::ENOENT
              raise "Cache directory name #{path} failed sanity check" unless path =~ /^#{public_dir}/
              Rails.logger.info "Expire tree #{path} using rm -rf"
              FileUtils.rm_rf(path, secure: true)
            end
          end
        end
      end
      
    else
      FileUtils.rm_r(Dir.glob("#{cache_dir}/*")) rescue Errno::ENOENT
    end
  rescue StandardError => e
    Rails.logger.error "Error while clearing cache: #{e.message}" unless e.is_a?(NoMethodError)
  end
end