Improve caching policy

* Cache css with version in url. This makes most js and css requests to
  be cached by the browser

* Force caching previews, the etag is in the url so that if the propfind
  gives a new etag, we will refresh it otherwise it's no use to try to
  fetch the new etag and do tons of DB queries

Tested with firefox and 'debug' => false (important so that the js/css
urls are generated with ?v= parameter)

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

1 files changed, 4 insertions, 2 deletions

diff --git a/core/Controller/PreviewController.php b/core/Controller/PreviewController.php
index 1224ea39877..30b0a45c13d 100644
--- a/core/Controller/PreviewController.php
+++ b/core/Controller/PreviewController.php
@@ -167,8 +167,10 @@ class PreviewController extends Controller {
 
 		try {
 			$f = $this->preview->getPreview($node, $x, $y, !$a, $mode);
-			$response = new FileDisplayResponse($f, Http::STATUS_OK, ['Content-Type' => $f->getMimeType()]);
-			$response->cacheFor(3600 * 24);
+			$response = new FileDisplayResponse($f, Http::STATUS_OK, [
+				'Content-Type' => $f->getMimeType(),
+			]);
+			$response->cacheFor(3600 * 24, false, true);
 			return $response;
 		} catch (NotFoundException $e) {
 			return new DataResponse([], Http::STATUS_NOT_FOUND);