[Opensymphony-oscache] Re: Got "HTTP/1.1 304 Not Modified" When Press Ctrl + F5

Usually "Cache-control : no-cache" is sent by [b]server to browser[/b] to ask browser not to cache the content. When we do hard-refresh, "Cache-control : no-cache" is sent by [b]browser to server[/b] to ask server not to send back the 'cache' copy. 

Anyway I tested with the following parameters:
<filter> 
<filter-name>CacheFilter</filter-name> 
<filter-class>com.opensymphony.oscache.web.filter.CacheFilter</filter-class> 

<init-param> 
<param-name>time</param-name> 
<param-value>600</param-value> 
</init-param> 

<init-param> 
<param-name>scope</param-name> 
<param-value>application</param-value> 
</init-param> 
</filter> 

<filter-mapping> 
<filter-name>CacheFilter</filter-name> 
<url-pattern>/getThumbnail.do</url-pattern> 
</filter-mapping> 

The browser still send "Cache-control : no-cache" in the header when I do hard-refresh. When I do hard-refresh, this "Cache-control : no-cache" appears in all the http header, including static image, jsp, which are not under oscache. "cache-control : no-cache" doesn't appear in http header [b]from browser unless we do a hard-refresh.[/b] 

I will dig out the HTTP protocol spec and check out about the hard-refresh later. 

Thanks!
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