代码风险审计双十一活动

# 示例：使用Redis缓存热门商品信息
import redis

r = redis.Redis(host='localhost', port=6379, db=0)

def get_product_info(product_id):
    info = r.get(f'product:{product_id}')
    if info is None:
        info = fetch_from_db(product_id)  # 假设这是从数据库获取信息的函数
        r.setex(f'product:{product_id}', 3600, info)  # 缓存1小时
    return info

# 示例：使用参数化查询防止SQL注入
import sqlite3

conn = sqlite3.connect('example.db')
cursor = conn.cursor()

def get_user_by_id(user_id):
    cursor.execute("SELECT * FROM users WHERE id=?", (user_id,))
    return cursor.fetchone()

# 示例：简单的单元测试
import unittest

class TestProductService(unittest.TestCase):
    def test_get_product_info(self):
        product_id = 123
        expected_info = {'name': 'Test Product', 'price': 99.99}
        self.assertEqual(get_product_info(product_id), expected_info)

if __name__ == '__main__':
    unittest.main()