Dragonfly and Zip uploads

rubyonrails-talk
1

I'm poring through the Dragonfly source code right now, trying to get a handle on how to apply the following technique there:

Client uploads a Zip archive containing N images, PDF files, text files, etc. When that file arrives at the server, but before it is stored as an attachment to the current object, the Zip is burst open, contents are iterated over, and each contained file is saved as a new Dragonfly attachment. The original Zip is discarded.

I have found an article from 2008 that shows in detail how to do this with Attachment Fu. But my understanding is that a: attachment_fu isn't up to date with Rails 3, let alone 3.1, and b: it uses a discrete AR model for the saved file, rather than the Dragonfly approach, which seems more indirect, or at least, doesn't present a clean target for extension.

Has anyone looked at this problem, and can anyone share any pointers? I'd really like to stick with Dragonfly, because it has so many benefits on the display side of things with on-the-fly resizing and cropping possible.

I can already see in my mind how I would use Paperclip to do this, that actually seems quite straightforward by comparison. So if there's a way to use Paperclip for the uploads and Dragonfly for the display later, I'd be curious to hear about that instead.

Thanks in advance,

Walter

2

Yes I did. My solution is bound to my application, but here it is, copied and pasted from the working app:

#source.rb (the model that the Dragonfly attachment lives in)

  file_accessor :file do     storage_path{|f| "titles/#{title_id}/#{f.name}"}   end   belongs_to :title   after_create :unpack

  def unpack     if zip?       source = File.join(file.app.datastore.configuration[:root_path],file_uid)       zipfile = Zip::ZipFile.open(source)       zipfile.each do |entry|         if entry.file? && ! File.basename(entry.name).match(/^\./)           if entry.name.downcase.match(/\.(pdf|mov|mp3|mp4|m4a|xml)$/)             extracted_file = zipfile.read(entry.name)             new_file = self.title.sources.build             new_file.file = extracted_file             new_file.file_name = File.basename(entry.name)             new_file.save!           end         end       end       self.destroy     end   end

  def zip?     file.format && file.format.to_s.include?('zip')   end

I am pretty sure I double-posted this question, and my reply that all was well was in the other thread. Please let me know if this makes sense, or if you need more explanation. It may be too concrete to my own needs, but I hope it gives you a start.

Walter