IE 11忽略缓存控制头作为响应

Question

I am setting Expires filter in web.xml of Tomcat. The header comes correctly in response but still IE is not caching. It is always making the fresh request to Tomcat.

<filter>
<filter-name>ExpiresFilter</filter-name>
<filter-class>org.apache.catalina.filters.ExpiresFilter</filter-class>
<init-param>
<param-name>ExpiresByType image/png</param-name>
<param-value>access plus 2 hours</param-value>
</init-param>

</filter>
<filter-mapping>
        <filter-name>ExpiresFilter</filter-name>
        <url-pattern>/*</url-pattern>
        <dispatcher>REQUEST</dispatcher>
</filter-mapping>

Below are the headers from respone

Cache-Control: max-age=7199

Expires: Mon, 14 Nov 2016 16:08:22 GMT

Content-Type: image/png

Transfer-Encoding: chunked

Date: Mon, 14 Nov 2016 14:08:22 GMT

Does anyone know, what am I missing here?

Answer 1

There is Microsoft's own documentation on cache-control .

Short answer: you have to use Pragma: no-cache , Cache-Control: no-cache and Expires all together.

Update 2019-01-24

The above instructions are for disabling caching, while the answer to being able to force caching can be found in this fine SO answer: Make IE to cache resources but always revalidate