# File lib/excon/middlewares/hijack.rb, line 28
      def response_call(datum)
        if datum[:hijack_block]
          # Need to process the response headers here rather than in
          # Excon::Middleware::ResponseParser as the response parser will
          # block trying to read the body.
          socket = datum[:connection].send(:socket)

          # c.f. Excon::Response.parse
          until match = /^HTTP\/\d+\.\d+\s(\d{3})\s/.match(socket.readline); end
          status = match[1].to_i

          datum[:response] = build_response(status, socket)

          Excon::Response.parse_headers(socket, datum)
          datum[:hijack_block].call socket.instance_variable_get(:@socket)
        end

        @stack.response_call(datum)
      end