Merge pull request #1758 from magento-qwerty/2.2.2-develop-PR

Fixed issues:
- MAGETWO-83152: [github] Pages are cached in browser and not updated

Author: dvoskoboinikov

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

@@ -157,6 +157,7 @@ sub vcl_backend_response {
     }
 
     # validate if we need to cache it and prevent from setting cookie
+    # images, css and js are cacheable by default so we have to remove cookie also
     if (beresp.ttl > 0s && (bereq.method == "GET" || bereq.method == "HEAD")) {
         unset beresp.http.set-cookie;
     }
@@ -187,6 +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;

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

@@ -158,6 +158,7 @@ sub vcl_backend_response {
     }
 
     # validate if we need to cache it and prevent from setting cookie
+    # images, css and js are cacheable by default so we have to remove cookie also
     if (beresp.ttl > 0s && (bereq.method == "GET" || bereq.method == "HEAD")) {
         unset beresp.http.set-cookie;
     }
@@ -188,6 +189,13 @@ 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;