Allow gem to work with MongoDB on Heroku

[simonv3]

I'm under the impression that this gem won't work with MongoDB on Heroku: #39 because Heroku is a read-only file system and this either requires the challenge directory or ActiveRecord?

Related because I can't create files on Heroku - (or unrelated, I'm not sure?) I can't figure out how to make the private key available on Heroku without checking it into the source code. I don't think checking it into the source code is the right way to go, but we're an open source app, so...

[lgromanowski]

Hi,
on Heroku you should use DB as a challenge storage (challenge_dir_name should be commented in config file) and after that please run rake letsencrypt_plugin task on heroku - it should connect with letsencrypt servers and print certificates on console.

// EDIT: I forgot that MongoDB gem don't use ActiveRecord - so, at this moment, this gem won't work with MongoDB on Heroku (patches are welcome)

[simonv3]

If you outline how and where to look and make this work and what kind of tests to write for this I would gladly write a PR. (If you don't have time for that it will just take me longer to do so :P)

[lgromanowski]

Code for challenge is placed in Challenge Model: https://github.com/lgromanowski/letsencrypt-plugin/blob/master/app/models/letsencrypt_plugin/challenge.rb:

module LetsencryptPlugin
  # if the project doesn't use ActiveRecord, we assume the challenge will
  # be stored in the filesystem
  if LetsencryptPlugin.config.challenge_dir_name.blank? && defined?(ActiveRecord::Base) == 'constant' && ActiveRecord::Base.class == Class
    class Challenge < ActiveRecord::Base
    end
  else
    class Challenge
      attr_accessor :response

      def initialize
        full_challenge_dir = File.join(Rails.root, LetsencryptPlugin.config.challenge_dir_name, 'challenge')
        @response = IO.read(full_challenge_dir)
      end
    end
  end
end

Place which should be changed is Challenge::initialize() method in "else" branch - at this moment that code tries to read challenge from a file.

[simonv3]

Cool, thanks!