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我正在开发一个项目，我必须为 IIS 7.5 中托管的站点进行基于扩展的缓存。

我在以下代码中使用此代码部分web.config：

<staticContent>
    <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="00:10:00" />
</staticContent>
<caching enabled="true" enableKernelCache="true">
    <profiles>
        <add extension=".aspx" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" /> 
        <add extension=".xml" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="10:00:00" location="Downstream" />
        <add extension=".php" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" /> 
        <add extension=".js" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" />
        <add extension=".css" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" />
        <add extension=".png" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="10:00:00" location="Downstream" />
        <add extension=".axd" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" />
        <add extension=".gif" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="10:00:00" location="Downstream" />
        <add extension=".txt" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:05:00" location="Downstream" />
        <add extension=".html" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" />
        <add extension=".htm" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" />
        <add extension=".vbs" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="00:10:00" location="Downstream" />
        <add extension=".flv" policy="CacheForTimePeriod" kernelCachePolicy="CacheForTimePeriod" duration="10:00:00" location="Downstream" />
    </profiles>
</caching>

但不知何故，在每次扩展时，我只能获得 10 分钟的缓存 TTL。

我还需要做些什么来完成这项工作吗？

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