Paperclip/Carrierwave configuration for Bluemix object space

carrierwave_test.rb

require 'bundler/setup'
require 'carrierwave'

CREDENTIALS = YAML.load_file('./credentials.yml')

CarrierWave.configure do |config|
  config.storage = :fog
  config.fog_credentials = {
    provider:               'openstack',
    openstack_auth_url:     CREDENTIALS[:auth_url],
    openstack_api_key:      CREDENTIALS[:password],
    openstack_project_id:   CREDENTIALS[:project_id],
    openstack_userid:       CREDENTIALS[:user_id],
    # openstack_username:     CREDENTIALS[:username],
    # openstack_domain_name:  CREDENTIALS[:domain_name],
    openstack_region:       CREDENTIALS[:region],
    openstack_auth_omit_default_port: true
  }
  config.fog_directory  = 'test_uploads'
  config.fog_public     = false
end

class TestUploader < CarrierWave::Uploader::Base
end

puts 'Generating ...'
`dd bs=1M count=1 if=/dev/urandom of=test_file.bin 2>&1 >/dev/null`
puts 'Uploading ...'
File.open('./test_file.bin') { |f| TestUploader.new.store!(f) }
puts 'Retrieving ...'
File.open('./test_file.2.bin', 'w') do |f|
  uploader = TestUploader.new
  uploader.retrieve_from_store!('test_file.bin')
  f << uploader.file.read
end
puts 'Comparing ..'
puts `diff -s test_file.bin test_file.2.bin`

Gemfile

source 'https://rubygems.org'

gem 'fog-openstack', github: 'fog/fog-openstack'
gem 'fog'
gem 'carrierwave'
gem 'paperclip'
gem 'pry-byebug'

paperclip_test.rb

require 'bundler/setup'

require 'active_support'
require 'active_support/core_ext'
require 'fog'
require 'paperclip'

CREDENTIALS = YAML.load_file('./credentials.yml')

class TestModel
  extend ActiveModel::Callbacks
  include ActiveModel::Model
  include Paperclip::Glue

  # Paperclip required callbacks
  define_model_callbacks :commit,  only: [:after]
  define_model_callbacks :save,    only: [:after]
  define_model_callbacks :destroy, only: [:before, :after]

  attr_accessor :file_file_name, :file_content_type, :file_file_size, :file_updated_at, :id
  has_attached_file :file,
                    storage: :fog,
                    path: 'uploads/:filename',
                    fog_directory: 'test_uploads',
                    fog_credentials: {
                      provider:               'openstack',
                      openstack_auth_url:     CREDENTIALS[:auth_url],
                      openstack_api_key:      CREDENTIALS[:password],
                      openstack_project_id:   CREDENTIALS[:project_id],
                      ###
                      # openstack_userid:       CREDENTIALS[:user_id],
                      #   one of these is required
                        openstack_username:     CREDENTIALS[:username],
                        openstack_domain_name:  CREDENTIALS[:domain_name],
                      ###
                      openstack_region:       CREDENTIALS[:region],
                      openstack_auth_omit_default_port: true
                    }
  do_not_validate_attachment_file_type :file

  def save
    run_callbacks :save
    true
  end
end


puts 'Generating ...'
`dd bs=1M count=1 if=/dev/urandom of=test_file.bin 2>&1 >/dev/null`
puts 'Uploading ...'

File.open('./test_file.bin') do |f|
  model = TestModel.new
  model.file = f
  model.save
end

puts 'Retrieving ...'

File.open('./test_file.2.bin', 'w') do |f|
  model = TestModel.new
  model.file_file_name = 'test_file.bin'
  model.file.copy_to_local_file('original', 'test_file.2.bin')
end

puts 'Comparing ..'
puts `diff -s test_file.bin test_file.2.bin`