From aae787fa8063ef179047800f7ee76da8f15136fc Mon Sep 17 00:00:00 2001
From: =?utf8?q?Roland=20H=C3=A4der?= <roland@mxchange.org>
Date: Tue, 13 Sep 2022 15:00:23 +0200
Subject: [PATCH] Changes: - added 3rd parameter to send Pragma/Cache-Control
 headers - maybe there is a better one in some composer package?

---
 src/Core/System.php | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/Core/System.php b/src/Core/System.php
index df8cb9377e..8c39aecdb6 100644
--- a/src/Core/System.php
+++ b/src/Core/System.php
@@ -514,20 +514,27 @@ class System
 	 *
 	 * @param string $url  The new Location to redirect
 	 * @param int    $code The redirection code, which is used (Default is 302)
+	 * @param bool   $proxy_headers Whether proxy-related headers are being sent
 	 *
+	 * @return void
 	 * @throws FoundException
 	 * @throws MovedPermanentlyException
 	 * @throws TemporaryRedirectException
-	 *
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 */
-	public static function externalRedirect($url, $code = 302)
+	public static function externalRedirect(string $url, int $code = 302, bool $proxy_headers = false)
 	{
 		if (empty(parse_url($url, PHP_URL_SCHEME))) {
 			Logger::warning('No fully qualified URL provided', ['url' => $url]);
 			DI::baseUrl()->redirect($url);
 		}
 
+		if ($proxy_headers) {
+			// Send Pragma/Cache-Control headers
+			header('Pragma: no-cache');
+			header('Cache-Control: no-cache, must-revalidate');
+		}
+
 		header("Location: $url");
 
 		switch ($code) {
-- 
2.39.5