Class: Anynines::Swift::Utility

Inherits:
Object
  • Object
show all
Defined in:
lib/a9s_swift/utility.rb

Constant Summary collapse

SWIFT_HOST = 
"https://swift.hydranodes.de"

Class Method Summary collapse

Class Method Details

.configure_carrierwave(image_bucket_name, options = {}) ⇒ Object

Sets up carrierwave for the usage with the anynines service. Creates a bucket with the given name if not already present.

Parameters:

  • image_bucket_name (String) —

    the bucket name to use

  • options (Hash) (defaults to: {}) —

    a hash of additional options



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# File 'lib/a9s_swift/utility.rb', line 39

def self.configure_carrierwave(image_bucket_name, options = {})
  raise "CarrierWave wasn't found in your environment! Please verify that carrierwave is included within your Gemfile and loaded correctly." if defined?(CarrierWave).nil?

  opts = initialize_options options
  create_new_bucket(image_bucket_name, opts[:fog_public])

  CarrierWave.configure do |config|
    config.fog_credentials = fog_credentials_hash

    config.storage = :fog
    config.fog_directory  = image_bucket_name
    config.fog_public     = opts[:fog_public]                                   # optional, defaults to true
  end
end

.configure_paperclip(image_bucket_name, options = {}) ⇒ Object

Sets up paperclip for the usage with the anynines service. Creates a bucket with the given name if not already present.

Parameters:

  • image_bucket_name (String) —

    the bucket name to use

  • options (Hash) (defaults to: {}) —

    a hash of additional options



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# File 'lib/a9s_swift/utility.rb', line 17

def self.configure_paperclip(image_bucket_name, options = {})
  raise "Paperclip wasn't found in your environment! Please verify that paperclip is included within your Gemfile and loaded correctly." if defined?(Paperclip).nil?

  opts = initialize_options options
  create_new_bucket(image_bucket_name, opts[:fog_public])

  # configure paperclip to use the credentials provided by the anynines environment    
  Paperclip::Attachment.default_options.update(
    {
      :path => ":class/:id/:attachment/:style/img_:fingerprint",
      :storage => :fog,
      :fog_credentials => self.fog_credentials_hash,
      :fog_directory => image_bucket_name,
      :fog_public => opts[:fog_public],
      :fog_host => "#{SWIFT_HOST}/v1/AUTH_#{fog_hash[:hp_tenant_id]}/#{image_bucket_name}"
    })
end

.create_new_bucket(bucket_name, public_access) ⇒ Object

Creates a new bucket with the given name if not already present

Parameters:

  • bucket_name (String) —

    a name for the bucket

  • public_access (Boolean) —

    should the bucket be publicly accessible?



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# File 'lib/a9s_swift/utility.rb', line 77

def self.create_new_bucket(bucket_name, public_access)
  connection = fog_connection
  if connection.directories.get(bucket_name).nil?
    puts "The bucket with key=#{bucket_name} wasn't found. Creating bucket with key=#{bucket_name} ."
    bucket = connection.directories.create key: bucket_name

    # set the directory to be public
    bucket.public = public_access
    bucket.save

    connection = nil
    return true
  else
    puts "The bucket with key=#{bucket_name} is already present! Skipping bucket creation."
    return false
  end
end

.fog_connection ⇒ Fog::Storage

Returns a fog storage connection to the swift service

Returns:

  • (Fog::Storage) —

    a fog storage connection



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# File 'lib/a9s_swift/utility.rb', line 9

def self.fog_connection
  Fog::Storage.new fog_credentials_hash
end

.fog_credentials_hash ⇒ Object

Returns a fog compatible credentials hash for the swift service



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# File 'lib/a9s_swift/utility.rb', line 55

def self.fog_credentials_hash
  # parse the VCAP_SERVICES environment variable
  services = JSON.parse(ENV["VCAP_SERVICES"])
  raise "Couldn't find the VCAP_SERVICE env variable! Are you running within an anynines environment?" if services.nil?
  raise "Couldn't access the a9s swift service credentials from env! Have you bound a swift service instance to the application?" if services["swift-1.0"].nil?
  swift_service = services["swift-1.0"].first

  return {
     :provider => 'HP',
     :hp_access_key => swift_service["credentials"]["user_name"],
     :hp_secret_key => swift_service["credentials"]["password"],
     :hp_tenant_id => swift_service["credentials"]["tenant_id"],
     :hp_auth_uri => swift_service["credentials"]["authentication_uri"],
     :hp_use_upass_auth_style => true,
     :hp_avl_zone => swift_service["credentials"]["availability_zone"],
     :os_account_meta_temp_url_key => swift_service["credentials"]["account_meta_key"]
  }
end