From c5c3a0a2a8febaa2b1ebcae6c17ff4398a9da6c7 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Mon, 20 Aug 2018 09:14:10 +0300
Subject: [PATCH] add (hidden) _NGINX_XACCEL_PREFIX which uses nginx
 X-Accel-Redirect to serve static files faster

---
 include/functions.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/functions.php b/include/functions.php
index b6e49716c..a4e0e4d02 100755
--- a/include/functions.php
+++ b/include/functions.php
@@ -2586,7 +2586,13 @@
 			$stamp = gmdate("D, d M Y H:i:s", filemtime($filename)) . " GMT";
 			header("Last-Modified: $stamp", true);
 
-			return readfile($filename);
+			if (defined('_NGINX_XACCEL_PREFIX') && _NGINX_XACCEL_PREFIX) {
+				header("X-Accel-Redirect: " . _NGINX_XACCEL_PREFIX . "/" . $filename);
+
+				return false;
+			} else {
+				return readfile($filename);
+			}
 		} else {
 			return false;
 		}