From 58c5ec6b45dcc52107f5e7c8bbca2933c7f2e98d Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Thu, 16 Sep 2021 09:48:10 +0200
Subject: [PATCH] login: return success status to whatsapp crawler

An 403 forbidden error will prevent metadata parsing and consecutive link
preview.
---
 login/index.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/login/index.php b/login/index.php
index 85dc2f5..cfe0027 100644
--- a/login/index.php
+++ b/login/index.php
@@ -39,7 +39,10 @@ elseif (isset($_GET['logout'])) {
 if (!$User or !$User->login) {
 	$Page->title = 'Inloggen';
 	if (isset($_REQUEST['goto'])) {
-		if (empty($message)) http_response_code(403);
+		if (empty($message)
+		and !preg_match('(^WhatsApp/)', $_SERVER['HTTP_USER_AGENT'])) {
+			http_response_code(403);
+		}
 		$target = ltrim($_REQUEST['goto'], '/');
 		$target = new ArchiveArticle("$target.html");
 		$target->index; # run forbidden handler to determine metadata
-- 
2.30.0