rails 4 email preview in production

Question

I am using rails 4.1.1 and ActionMailer::Preview for previewing emails. In development environment everything is working excellent.

But in production environment the preview routes are not accessible. I store the previews in test/mailers/previews/

Is is possible to enable them for production?

Answer 1

To do it without opening a big security hole:

production.rb

MyApp::Application.configure do
  config.action_mailer.preview_path ||= defined?(Rails.root) ? "#{Rails.root}/spec/mailer_previews" : nil
  config.autoload_paths += [config.action_mailer.preview_path]

  routes.append do
    get '/rails/mailers'         => "rails/mailers#index"
    get '/rails/mailers/*path'   => "rails/mailers#preview"
  end
end

class ::Rails::MailersController
  before_filter :authenticate_admin!
  def local_request?
    true
  end
  private
  def authenticate_admin!
    ...
  end
end