# File lib/capybara/server.rb, line 57
    def responsive?
      return false if @server_thread && @server_thread.join(0)

      res = Net::HTTP.start(host, @port) { |http| http.get('/__identify__') }

      if res.is_a?(Net::HTTPSuccess) or res.is_a?(Net::HTTPRedirection)
        return res.body == @app.object_id.to_s
      end
    rescue Errno::ECONNREFUSED, Errno::EBADF
      return false
    end