Pagespeed - Cache-Control responses that will be optimised

[Matthew Johnson]

I have just hit a use case where a site is responding with "Cache-Control:max-age=1209600" for CSS and JS resources.

PageSpeed wont optimise these resources until I alter the response header to be "Cache-Control:public, max-age=1209600"

I cant see where the RFC says resources without a specific directive should not be cached (/optimised) - http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.4

Am I reading things wrong or is there an issue with my sample response headers?

Matt

[Jeff Kaufman]

PageSpeed shouldn't be requiring public in Cache-Control. For example:

$ curl -D- www.jefftk.com/cc-no-public/example.js?$RANDOM
HTTP/1.1 200 OK
Server: nginx/1.7.5
Content-Type: application/javascript
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
Date: Wed, 22 Apr 2015 11:38:22 GMT
Expires: Wed, 22 Apr 2015 11:43:22 GMT
Cache-Control: max-age=300
Last-Modified: Wed, 22 Apr 2015 11:37:20 GMT

document.write("hello world");

$ curl -D- www.jefftk.com/cc-no-public/example?PageSpeedFilters=rewrite_javascript
HTTP/1.1 200 OK
Server: nginx/1.7.5
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
Date: Wed, 22 Apr 2015 11:39:54 GMT
X-Page-Speed: 1.9.32.1-4238
Cache-Control: max-age=0, no-cache

<script src="example.js.pagespeed.jm.FMcWf6kM9U.js"></script>

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[Jeff Kaufman]

Could you share a link to your site, or is there anything unusual
about your setup?

[Matthew Johnson]

Hi Jeff,

Cheers for quick response, Ill pull together an example on my end and provide details.

Cant think of anything too unusual in this setup.

Update for you tomorrow,

Matt

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