Always add cache control headers

lib/Controller.php

@@ -143,6 +143,8 @@ class Controller
                 break;
         }
 
+        $this->_setCacheHeaders();
+        
         // output JSON or HTML
         if ($this->_request->isJsonApiCall()) {
             header('Content-type: ' . Request::MIME_JSON);
@@ -177,6 +179,21 @@ class Controller
             setcookie('lang', $lang, 0, '', '', true);
         }
     }
+    /**
+     * Turn off browser caching
+     * 
+     * @access private
+     */
+    private function _setCacheHeaders()
+    {
+        // set headers to disable caching
+        $time = gmdate('D, d M Y H:i:s \G\M\T');
+        header('Cache-Control: no-store, no-cache, no-transform, must-revalidate');
+        header('Pragma: no-cache');
+        header('Expires: ' . $time);
+        header('Last-Modified: ' . $time);
+        header('Vary: Accept');
+    }
 
     /**
      * Store new paste or comment
@@ -343,13 +360,6 @@ class Controller
      */
     private function _view()
     {
-        // set headers to disable caching
-        $time = gmdate('D, d M Y H:i:s \G\M\T');
-        header('Cache-Control: no-store, no-cache, no-transform, must-revalidate');
-        header('Pragma: no-cache');
-        header('Expires: ' . $time);
-        header('Last-Modified: ' . $time);
-        header('Vary: Accept');
         header('Content-Security-Policy: ' . $this->_conf->getKey('cspheader'));
         header('Cross-Origin-Resource-Policy: same-origin');
         header('Cross-Origin-Embedder-Policy: require-corp');