js_loader_modules, js_bundle_config and available_languages.jsp are not cacheable

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP81, 7.0.X, 7.1.3 CE GA4, 7.1.10 DXP FP11, 7.1.X, Master
• Component/s: Frontend Infrastructure
• Labels:
  • ee-ts
  • liferay-fixpack-de-81-7010
  • liferay-fixpack-dxp-11-7110
• Branch Version/s:
  7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Story Points: 0.25
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/71019

Reproduction steps:

1) Start the portal
2) Open Incognito and open the browser's dev console and move to "Network" tab, ensure the "Disable cache" is not selected, hit http://localhost:8080and observe the network requests coming in
3) Once the page has finished loading, reload it again, so all cacheable resources will be loaded from cache. Observe the requests:

Expected: Requests for js_loader_modules, js_bundle_config and available_languages.jsp to be loaded from cache
Actual behavior: Those resources will be fetched again
Important Note: https://issues.liferay.com/browse/LPS-93353?focusedCommentId=1765090&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1765090

 Reproduced on master

Observing the headers and comparing them to other requests where t= parameter is present and caching does happen, the ones for these 3 files are missing some parts, for example, eTag and Cache-Control.