stale-while-revalidate and stale-if-error implementation

[Dewangga Bachrul Alam]

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Hello!

I tried to use "stale-if-error=864000" and
"stale-while-revalidate=864000" co-exist with "expires max;"
directive. Is it possible? My configurations looks like :

... snip ...
expires max;
add_header Cache-Control "stale-while-revalidate=864000,
stale-if-error=864000";
... snip ...

And header response return :

cache-control:max-age=315360000
cache-control:stale-while-revalidate=864000, stale-if-error=864000

Is it ok and acceptable in major modern browser?

Or, should I changes the header to :

add_header Cache-Control "max-age=315360000,
stale-while-revalidate=864000, stale-if-error=864000";

Any feedbacks and helps would be appreciated.
Thanks in advance.
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