# proxy\_cache\_valid

<mark style="color:blue;">**proxy\_cache\_valid**</mark>指令<mark style="color:blue;">**可以针对不同的HTTP响应状态设置不同的缓存时间**</mark>，其语法结构为：

```nginx
proxy_cache_valid [ code ...] time;
```

* <mark style="color:blue;">**code**</mark>，设置**HTTP响应的状态码**。
  * 该指令可选，如果**不设置**，Nginx服务器只为HTTP状态代码为**200**、**301**和**302**的响应数据做缓存。
  * 可以使用“**any**”表示缓存所有该指令中未设置的其他响应数据。
* <mark style="color:blue;">**time**</mark>，设置缓存时间。

{% hint style="success" %}

```nginx
proxy_cache_valid 200 302 10m;
proxy_cache_valid 301 1h;
proxy_cache_valid any 1m;
```

该例子中，对返回状态为**200**和**302**的响应数据缓存**10分钟**，对返回状态为**301**的响应数据缓存**1小时**，对返回状态为**非200、302和301**的响应数据缓存**1分钟**。
{% endhint %}


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