# File lib/fog/storage/requests/google/get_object.rb, line 57
        def get_object(bucket_name, object_name, options = {}, &block)
          unless bucket_name
            raise ArgumentError.new('bucket_name is required')
          end
          unless object_name
            raise ArgumentError.new('object_name is required')
          end
          response = Excon::Response.new
          if (bucket = self.data[:buckets][bucket_name]) && (object = bucket[:objects][object_name])
            if options['If-Match'] && options['If-Match'] != object['ETag']
              response.status = 412
            elsif options['If-Modified-Since'] && options['If-Modified-Since'] > Time.parse(object['Last-Modified'])
              response.status = 304
            elsif options['If-None-Match'] && options['If-None-Match'] == object['ETag']
              response.status = 304
            elsif options['If-Unmodified-Since'] && options['If-Unmodified-Since'] < Time.parse(object['Last-Modified'])
              response.status = 412
            else
              response.status = 200
              for key, value in object
                case key
                when 'Cache-Control', 'Content-Disposition', 'Content-Encoding', 'Content-Length', 'Content-MD5', 'Content-Type', 'ETag', 'Expires', 'Last-Modified', /^x-goog-meta-/
                  response.headers[key] = value
                end
              end
              unless block_given?
                response.body = object[:body]
              else
                data = StringIO.new(object[:body])
                remaining = data.length
                while remaining > 0
                  chunk = data.read([remaining, Excon::CHUNK_SIZE].min)
                  block.call(chunk)
                  remaining -= Excon::CHUNK_SIZE
                end
              end
            end
          else
            response.status = 404
            raise(Excon::Errors.status_error({:expects => 200}, response))
          end
          response
        end