how to set up both httpexpires and cachecontrol headers

问题

I want to set up both expires and cachecontrol and httpExpires headers in web.config by following the answer on that question What's the difference Expires and Cache-control:max-age?

     <system.webServer>
        <staticContent>
            <clientCache cacheControlCustom="public" cacheControlMaxAge="12:00:00" cacheControlMode="UseMaxAge" />
            <clientCache cacheControlCustom="public" httpExpires="Tue, 19 Jan 2038 03:14:07 GMT" cacheControlMode="UseExpires" />
        </staticContent>
    </system.webServer>

But for some reason images became not available when I am doing that.

I've got Failed to load resource: the server responded with a status of 500 (Internal Server Error) error on each image load (I can see that errors in browser dev tools console).

I guess I configure it wrong?

It would work if I comment any of clientCache section by leaving only single one

How to fix that?

UPDATED: Just asked one more related question how to set up both httpexpires and cachecontrol headers web.cofig:

回答1:

This IIS Client Cache page states that 'While the "Expires" and "max-age" settings are somewhat analagous, the "max-age" directive takes priority over "Expires"'. However, IIS generates HTTP 500 errors when one "max-age" clientCache entry was used in parallel with an "Expires" clientCache entry.

The "Expires" and "max-age" are mutually exclusive of one another when adjusting the "Set Common Headers" in IIS. You can use one or the other, but not both.

Other cache directives can be applied to subfolders or specific files in Web.config. See this stackoverflow page on configuring cache content in IIS7.

回答2:

<staticContent>
        <clientCache cacheControlCustom="public;max-age" cacheControlMode="UseMaxAge" cacheControlMaxAge="10.00:00:00" />
</staticContent>
<urlCompression dynamicCompressionBeforeCache="true" />

This worked fine for me to cache a request for 10 days.

来源：https://stackoverflow.com/questions/20826035/how-to-set-up-both-httpexpires-and-cachecontrol-headers

标签

ASP.NET

asp.net-mvc

http-headers

cache-control