Codefluency RTeX

Comments and changes to this ticket

• You flagged this item as spam.
  

  Michael Kastner June 9th, 2008 @ 03:42 PM

  This a short example of a hack for caching documents. What it basically does is that it checks whether a cached file already exists.

  If a cached file exists the request is redirected to the url, where the file is located.

  If no cached file exists, a regular render is kicked off. After the pdf is rendered the after_filter-method cache_pdf grabs the response stream and saves it to the caching location.

  I think, that's pretty straight forward. Just an idea, how caching could work:

  class PublicMagazinesController < PublicController

  layout nil

  after_filter :cache_pdf, :only => :publish

  DIR_URL = '/cache/magazines/'

  DIR_PATH = File.join('/public/', DIR_URL)

  def publish

  @magazine = Magazine.find(params[:id])

  @file_path = File.join(RAILS_ROOT, DIR_PATH, @magazine.file_name)

  if File.exist? @file_path

  redirect_to File.join(DIR_URL, @magazine.file_name)

  else

  @cache_rtex_document = true

  render :template => @magazine.template,

  :filename => @magazine.file_name,

  :preprocess => true

  end

  end

  private

  def cache_pdf

  if @cache_rtex_document

  path = File.join(RAILS_ROOT, DIR_PATH, @magazine.file_name)

  FileUtils.makedirs(File.dirname(path))

  File.open(path, "wb+") { |f|

  response.body.call(response, f)

  }

  end

  end

  end