From 0633e4d467698698c8ece9b99ee2e6e0ff4e5297 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tim=20D=C3=BCsterhus?= <duesterhus@woltlab.com>
Date: Mon, 8 Aug 2022 11:38:18 +0200
Subject: [PATCH] Add `\wcf\http\Helper`

---
 .../install/files/lib/http/Helper.class.php   | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 wcfsetup/install/files/lib/http/Helper.class.php

diff --git a/wcfsetup/install/files/lib/http/Helper.class.php b/wcfsetup/install/files/lib/http/Helper.class.php
new file mode 100644
index 0000000000..6dec16e390
--- /dev/null
+++ b/wcfsetup/install/files/lib/http/Helper.class.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace wcf\http;
+
+use Psr\Http\Message\ServerRequestInterface;
+
+/**
+ * Provides various helper methods for PSR-7/PSR-15 request processing.
+ *
+ * @author  Tim Duesterhus
+ * @copyright   2001-2022 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package WoltLabSuite\Core\Http
+ * @since   6.0
+ */
+final class Helper
+{
+    /**
+     * Returns whether the request's 'x-requested-with' header is equal
+     * to 'XMLHttpRequest'.
+     */
+    public static function isAjaxRequest(ServerRequestInterface $request): bool
+    {
+        return $request->getHeaderLine('x-requested-with') === 'XMLHttpRequest';
+    }
+
+    /**
+     * Forbid creation of Helper objects.
+     */
+    private function __construct()
+    {
+        // does nothing
+    }
+}
-- 
2.20.1