When uploading a webfile content on a webfile node through JCR console manually, the cache is not invalidated.

Reproduction Path

• Create a project using hippo v11.2 archetype.
• Add news features through Essentials and rebuild/run.
• Visit homepage, http://localhost:8080/site/. The homepage contains a css link like the following:

  <link rel="stylesheet" href="/site/webfiles/1486145704235/css/bootstrap.css" type="text/css"/>
  

• Hit http://localhost:8080/site/webfiles/1486145704235/css/bootstrap.css directly and see the result.
• Open CMS Console and navigate to http://localhost:8080/cms/console/?1&path=/webfiles/site/css/bootstrap.css/jcr:content.
• Download the jcr:data to store it into bootstrap.css in a local folder. Make some changes in the css and upload it to the jcr:data. Write changes to repository.
• (Optional) You might want to put a debugger at org.hippoecm.hst.core.container.WebFileValve#onEvent(Event) where the property update event is supposed to be handled to invalidate the webfile cache.
  In debugger, the path variable is '/webfiles/site/css/bootstrap.css/jcr:content/jcr:data', not the webfile logical path, '/webfiles/site/css/bootstrap.css'.

      public void onEvent(final Event event) throws RepositoryException {
          final String path = event.getPath();
          final boolean remove = webFileCache.remove(path);
          if (remove) {
              log.debug("Removed '{}' from webFileCache", path);
          }
          negativeWebFileCache.invalidate(path);
      }
  

• Hit again http://localhost:8080/site/webfiles/1486145704235/css/bootstrap.css directly and see the result.
• You should see the updated css webfile resource, but you cannot.
• Even if you update the anticache timestamp in both /webfiles/site node and URL, it doesn't fix the problem.

This bug is conflicting the statement for the Problem 4 in [1] and the intention of HSTTWO-3682, IMHO.

Probable root cause

• As mentioned in the optional step above, the cache key is generated as the logical representative webfile node path (e.g, '/webfiles/site/css/bootstrap.css'). However, the cache invalidation in org.hippoecm.hst.core.container.WebFileValve#onEvent(Event) doesn't infer the proper path, but simply uses any descendant node path.

[1] https://www.onehippo.org/library/concepts/web-files/web-files-troubleshooting.html
(It says, "You ... updated the Binary property with the upload option ...", which is exactly the same as the reproduction path. Recreating the node might be a workaround, but not so convenient for developers' loves.)