oschaaf commented on issue #1535: Pagespeed with downstream cache: How to cache 
static resources?
URL: 
https://github.com/apache/incubator-pagespeed-ngx/issues/1535#issuecomment-365173878
 
 
   Not sure if this works for cache detectives but it is worth a try.. Could
   you try if you can use
   https://www.modpagespeed.com/doc/configuration#add-resource-header to
   massage the final resource response headers into what you need?
   
   Otto
   On Tue, 13 Feb 2018 at 07:54, Tobias Schlottke <notificati...@github.com>
   wrote:
   
   > Hi Otto,
   >
   > I have got this configuration set up for caching of .pagespeed. resources:
   >
   > # Ensure requests for pagespeed optimized resources go to the pagespeed 
handler
   > # and no extraneous headers get set.
   > location ~ "\.pagespeed\." {
   >   add_header "Cache-Control: public, max-age=86400";
   > }
   >
   > If I disable pagespeed, there are no .pagespeed. resources but if I use
   > the same config for all static resources, it obviously works.
   >
   > I now played with both, ModifyCachingHeaders and extend_cache with the
   > following results:
   >
   > *pagespeed ModifyCachingHeaders Off, pagespeed EnableFilters extend_cache:*
   >
   > HTTP/1.1 200 OK
   > Date: Tue, 13 Feb 2018 06:31:29 GMT
   > Content-Type: text/css
   > Connection: keep-alive
   > Server: nginx
   > Accept-Ranges: bytes
   > X-Original-Content-Length: 32893
   > Vary: Accept-Encoding
   > Content-Length: 25405
   > X-Page-Speed: 1.12.34.3-0
   >
   > *pagespeed ModifyCachingHeaders On, pagespeed EnableFilters extend_cache:*
   >
   > HTTP/1.1 200 OK
   > Content-Type: text/css
   > Connection: keep-alive
   > Server: nginx
   > Accept-Ranges: bytes
   > Date: Thu, 08 Feb 2018 22:06:44 GMT
   > Expires: Fri, 08 Feb 2019 22:06:44 GMT
   > ETag: W/"0"
   > Last-Modified: Thu, 08 Feb 2018 22:06:44 GMT
   > Cache-Control: max-age=31536000, public
   > X-Original-Content-Length: 32893
   > Vary: Accept-Encoding
   > Content-Length: 25405
   > X-Page-Speed: 1.12.34.3-
   >
   > Disabling extend_cache has the same result as the first example.
   >
   > Conclusion: ModifyCachingHeaders On and extend_cache in combination are
   > closest to the expected result.
   > I cannot turn ModifyCachingHeaders to On as caching HTML won't work
   > anymore. I also can't modify the headers manually as pagespeed suppresses
   > this.
   > Also, the ETag: W/"0" will lead to minus points when checking with
   > Pagespeed insights.
   >
   > What can I do? Why can't I override caching for those resources, if I need
   > to?
   >
   > Tobias
   >
   > ?
   > You are receiving this because you were mentioned.
   >
   >
   > Reply to this email directly, view it on GitHub
   > 
<https://github.com/apache/incubator-pagespeed-ngx/issues/1535#issuecomment-365168160>,
   > or mute the thread
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