Contents

module CarrierWaveBase64Uploader
  class Base64StringIO < StringIO
    class ArgumentError < StandardError; end

    attr_accessor :file_extension, :file_name

    def initialize(encoded_file, file_name_proc_or_string)
      description, encoded_bytes = encoded_file.split(',')

      raise ArgumentError unless encoded_bytes
      raise ArgumentError if encoded_bytes.eql?('(null)')

      @file_name = extract_file_name(file_name_proc_or_string)
      @file_extension = get_file_extension description
      bytes = ::Base64.decode64 encoded_bytes

      super bytes
    end

    def original_filename
      File.basename("#{@file_name}.#{@file_extension}")
    end

    private

    def get_file_extension(description)
      content_type = description.split(';base64').first
      mime_type = MIME::Types[content_type].first

      raise ArgumentError, "Unknown MIME type: #{content_type}" unless mime_type

      mime_type.preferred_extension
    end

    def extract_file_name(proc_or_string)
      # if proc_or_string.is_a?(Proc)
      proc_or_string.call
      # else
      # proc_or_string
      # end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
carrier_wave_base64_uploader-0.1.2	lib/carrier_wave_base64_uploader/base64_string_io.rb
carrier_wave_base64_uploader-0.1.1	lib/carrier_wave_base64_uploader/base64_string_io.rb
carrier_wave_base64_uploader-0.1.0	lib/carrier_wave_base64_uploader/base64_string_io.rb