未登录用户的购物车保存

  # 未登录用户, 将购物车保存在浏览器的cookie()中
  {
      'sku_id1': {'count': 2, 'selected': True}, 
      'sku_id2': {'count': 5, 'selected': True}
  } # 前端数据类型 

  import pickle
  import base64
  data_bytes = pickle.dumps(data)
  data_str = base64.b64encode(data_bytes)
  response = http.JsonResponse()
  response.set_cookie(data_str)
  return response

  data_str = request.COOKIE.get(data_str)
  data_bytes = base64.b64decode(data_str)
  data = pickle.loads(data_bytes)