From c40dcf020c4bebd4eb4b4f8cf28e5e7de5f57d97 Mon Sep 17 00:00:00 2001
From: Rotzbua <Rotzbua@users.noreply.github.com>
Date: Tue, 15 Jan 2019 01:49:46 +0100
Subject: [PATCH] add do not track header detection (#2334)

---
 system/src/Grav/Common/Browser.php | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/system/src/Grav/Common/Browser.php b/system/src/Grav/Common/Browser.php
index bb0a3fb4f..dfe1c58a7 100644
--- a/system/src/Grav/Common/Browser.php
+++ b/system/src/Grav/Common/Browser.php
@@ -134,4 +134,19 @@ class Browser
 
         return true;
     }
+    
+    /**
+     * Determine if “Do Not Track” is set by browser
+     * @see https://www.w3.org/TR/tracking-dnt/
+     *
+     * @return bool
+     */
+    public function isTrackable(): bool
+    {
+        if ($_SERVER['HTTP_DNT'] === '1') {
+            return false;
+        }
+
+        return true;
+    }
 }