网硕互联帮助中心文章目录
- `no-cache`与`no-store`的区别
-
- 本质区别
- `no-cache`详解
- `no-store`详解
- 示例对比
- 性能影响
no-cache与no-store的区别
本质区别
- no-cache: 允许缓存资源，但使用前必须向服务器验证
- no-store: 完全禁止缓存，不允许存储任何资源副本
no-cache详解
工作机制:
Cache-Control: no-cache
适用场景:
- 经常变化但可接受短暂延迟的资源
- 需要确保内容最新但又想减少带宽使用的情况
no-store详解
工作机制:
Cache-Control: no-store
适用场景:
- 包含敏感信息的页面（如银行交易、个人信息）
- 一次性访问的数据（如动态生成的下载链接）
- 每次必须实时获取的内容（如实时股票价格）
示例对比
// 银行账户信息API – 使用no-store完全禁止缓存
app.get('/api/account-details', (req, res) => {
res.setHeader('Cache-Control', 'no-store');
// 返回敏感账户信息
});
// 新闻内容API – 使用no-cache允许缓存但需要验证
app.get('/api/news', (req, res) => {
res.setHeader('Cache-Control', 'no-cache');
// 返回可能会更新的新闻内容
});
性能影响
- no-cache: 可能减少带宽使用，但不减少请求次数
- no-store: 始终消耗最大带宽，无缓存优化可能
正确选择这两种指令对网站性能和数据安全性有重要影响。
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