Allow browsers to cache static assets

[Bargs]

Right now we send cache-control: no-cache in response to requests for the webpack generated css and js bundles, and probably other static assets. Since these files only change as often as the Kibana version, and we already send the build number as a query param in the request to bust the cache, we should totally allow the browser to cache them. But Kibana is a single page app you say, it's only the initial page load that's slow so it's not that important. But that's not always the case.

[cpitzak]

+1

[grindthemall]

+1 definitely.

I was having fits trying to figure out what was going on. Hopefully this will be addressed as I'm going to have large numbers of users, and really don't want to require them all to constantly download the same files when they could be cached.

[ChrisCinelli]

Please fix this. The index.jsis currently 5Mb... when I am on the go it takes forever to load it!

[vijaygoturi]

Any update on the cache control? I am working on kibana 5.6 and on being Iframed the dashboard, I am getting the response header as "cache-control:no-cache".

[BlueBeN82]

same as @vijaygoturi for me

[epixa]

This seems like super low fruit to me, and the impact would be significant. It does require some testing around upgrading kibana and installing/removing plugins, but if we made it possible to disable http caching via a kibana.yml configuration, the risk here is pretty low even if we do hit edge cases with the caching.

[burtonator]

+1... this is huge for our customers as the initial experience is horrible. Waiting 1-5 seconds for an app to load isn't acceptable. It seems broken to many people.

[fzyzcjy]

Hi I am confused why it still does not cache anything in kibana 7.9.0 ...

For example, every time the url https://localhost:5601/33813/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js is fetched and about 1MB of js is downloaded which is unacceptable. (There are also many other large files, such as https://localhost:5601/33813/bundles/plugin/ml/ml.plugin.js and so on.)

Response headers:

cache-control: max-age=31536000
Connection: keep-alive
content-encoding: br
content-type: application/javascript; charset=utf-8
Date: Thu, 29 Oct 2020 13:31:45 GMT
kbn-license-sig: ...
kbn-name: elastic
kbn-xpack-sig: ...
Transfer-Encoding: chunked
vary: accept-encoding

I am using Chrome 86.

[fzyzcjy]

Hi after more than a month... It still does not cache. Could anyone provide some suggestions? Thanks!

[abhisheksoni27]

Was this fixed?

[abhisheksoni27]

I am still getting this issue on kibana 7.6.0