Class: Aspera::DataRepository

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/aspera/data_repository.rb

Overview

a simple binary data repository

Constant Summary collapse

ELEMENTS =

in same order as elements in folder

%i[dsa rsa uuid aspera.global-cli-client aspera.drive license]

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.instance ⇒ DataRepository

Returns the singleton instance of DataRepository

Returns:



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# File 'lib/aspera/data_repository.rb', line 13

class DataRepository
  include Singleton

  # in same order as elements in folder
  ELEMENTS = %i[dsa rsa uuid aspera.global-cli-client aspera.drive license]
  START_INDEX = 1
  DATA_FOLDER_NAME = 'data'

  # decode data as expected as string
  # @param name [Symbol] name of the data item
  # @return [String] decoded data
  def item(name)
    index = ELEMENTS.index(name)
    raise ParameterError, "Unknown data item #{name} (#{name.class})" unless index
    raw_data = data(START_INDEX + index)
    case name
    when :dsa, :rsa
      # generate PEM from DER
      return OpenSSL::PKey.const_get(name.to_s.upcase).new(raw_data).to_pem
    when :license
      return Zlib::Inflate.inflate(raw_data)
    when :uuid
      return format('%08x-%04x-%04x-%04x-%04x%08x', *raw_data.unpack('NnnnnN'))
    when :'aspera.global-cli-client', :'aspera.drive'
      return Base64.urlsafe_encode64(raw_data)
    else Aspera.error_unexpected_value(name)
    end
  end

  private

  private_constant :START_INDEX, :DATA_FOLDER_NAME

  # get binary value from data repository
  def data(id)
    File.read(File.join(__dir__, DATA_FOLDER_NAME, id.to_s), mode: 'rb')
  end
end

Instance Method Details

#item(name) ⇒ String

decode data as expected as string

Parameters:

  • name (Symbol) —

    name of the data item

Returns:

Raises:



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# File 'lib/aspera/data_repository.rb', line 24

def item(name)
  index = ELEMENTS.index(name)
  raise ParameterError, "Unknown data item #{name} (#{name.class})" unless index
  raw_data = data(START_INDEX + index)
  case name
  when :dsa, :rsa
    # generate PEM from DER
    return OpenSSL::PKey.const_get(name.to_s.upcase).new(raw_data).to_pem
  when :license
    return Zlib::Inflate.inflate(raw_data)
  when :uuid
    return format('%08x-%04x-%04x-%04x-%04x%08x', *raw_data.unpack('NnnnnN'))
  when :'aspera.global-cli-client', :'aspera.drive'
    return Base64.urlsafe_encode64(raw_data)
  else Aspera.error_unexpected_value(name)
  end
end