[Koha] Cache and languange change not working

[Alvaro Cornejo]

Hi

Folllowing some advise from   https://www.webpagetest.org/  and
https://lighthouse-dot-webdotdevsite.appspot.com/ for optimizing koha.

I´ve found small issues that I was able to fix locally and some, well,are
too complex fro my knowledge and guess require changes in koha code.
Note that lighthouse detected that jQuery at 3.4.1
<https://snyk.io/vuln/npm:jquery?lh=3.4.1&utm_source=lighthouse&utm_medium=ref&utm_campaign=audit>
have
two medium risk vulnerabilities.

The issue I'm trying to fix is regarding the cache. I had y servier with no
cache header so max-age was not setup.

I´addedd header cache max-age 3600 public to apache header and now after
two language changes I'm unable to change it again. If I clear my browser
cache, completely disable cache header or wait the 3600 seconds, I can
again change the language for two times.

How can I avoid browser to cache only language change part? I guess there
is a way to exclude from cache specific files.

Regards

Alvaro




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