Merge branch 'MAGETWO-88209' into 2.3-bugfixes-220318

Author: Dmytro Voskoboinikov

app/code/Magento/PageCache/etc/varnish4.vcl

@@ -187,6 +187,13 @@ sub vcl_deliver {
         unset resp.http.Age;
     }
 
+    # Not letting browser to cache non-static files.
+    if (resp.http.Cache-Control !~ "private" && req.url !~ "^/(pub/)?(media|static)/") {
+        set resp.http.Pragma = "no-cache";
+        set resp.http.Expires = "-1";
+        set resp.http.Cache-Control = "no-store, no-cache, must-revalidate, max-age=0";
+    }
+
     unset resp.http.X-Magento-Debug;
     unset resp.http.X-Magento-Tags;
     unset resp.http.X-Powered-By;

app/code/Magento/PageCache/etc/varnish5.vcl

@@ -188,6 +188,13 @@ sub vcl_deliver {
         unset resp.http.Age;
     }
 
+    # Not letting browser to cache non-static files.
+    if (resp.http.Cache-Control !~ "private" && req.url !~ "^/(pub/)?(media|static)/") {
+        set resp.http.Pragma = "no-cache";
+        set resp.http.Expires = "-1";
+        set resp.http.Cache-Control = "no-store, no-cache, must-revalidate, max-age=0";
+    }
+
     unset resp.http.X-Magento-Debug;
     unset resp.http.X-Magento-Tags;
     unset resp.http.X-Powered-By;