FAQs
Do I still need to create “Edge Cache TTL” page rules with “Cache Level: Cache Everything”?
No, you don’t need create Edge Cache TTL page rules. When the WordPress plugin is installed, APO automatically caches content for 30 days and invalidates on change within 30 seconds. However, because APO now supports cache-related page rules, make sure existing page rules don’t affect the resources served by APO.
Does Origin Cache Control override APO?
No. APO ignores Origin Cache Control for caching on the Edge, but APO serves original Origin Cache Control to the client.
Why are my browser cache control headers missing with APO?
The browser cache control headers may be missing with APO if you set your browser to cache TTL to “respect existing headers.” For example:
$ curl -sv -o /dev/null https://example.com/ -H 'Accept: text/html' 2>&1 | grep cache-control
< cache-control: max-age=86400, stale-while-revalidate=86400, stale-if-error=86400
Is the stale-if-error directive still needed with APO?
No, the stale-if-error directive is not needed because the feature is built into APO.
When I check the posts and homepage cache status, the response header shows cf-cache-status: BYPASS
. Is APO working?
When Chrome DevTools is open, Chrome sends Cache-Control: no-cache
by default. You can uncheck the Disable cache (while DevTools is open) setting and see that cf-cache-status: HIT
and cf-apo-via: cache
headers will be returned.
When I check cf-cache-status
via cURL, MISS
and DYNAMIC
are always returned. In my browser, I see HIT
but other tools return DYNAMIC
. Is this expected behavior?
Yes, this is expected behavior because the requests must contain accept: "text/html"
.
Are Google Fonts optimized when APO is activated?
Yes, Google Fonts are also optimized when APO is activated. You can confirm the optimization by checking the font URLs. For example, the URL will change from https://fonts.gstatic.com/s/...
to https://example.com/fonts.gstatic.com/s/...
when the site loads. For proxied fonts, the cf-apo-via:proxy
header is returned.
Can I customize query string caching with APO?
For more information on query parameters, see Query parameters and cached responses.
Why are my font URLs not being transformed?
APO will skip URL font transformation when the content-security-policy
response header is present but missing the values described below.
To fix the problem, the content-security-policy
header value must allow for unsafe-inline
on either the style-src
or ‘default-src
’ directive. For example, Content-Security-Policy: style-src unsafe-inline;
.
The header must allow for self
on either the font-src
or default-src
directive. For example, Content-Security-Policy: font-src self;
.