From 0e83566aacf40e01920c61c71984871373c622c8 Mon Sep 17 00:00:00 2001
From: Axel Guckelsberger <info@guite.de>
Date: Mon, 20 Sep 2021 13:01:56 +0200
Subject: [PATCH] ignore feed items with invalid permalink schemes

---
 src/extensions/Zikula/ContentModule/ContentType/FeedType.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/extensions/Zikula/ContentModule/ContentType/FeedType.php b/src/extensions/Zikula/ContentModule/ContentType/FeedType.php
index 8e2804113..88b30a7c3 100644
--- a/src/extensions/Zikula/ContentModule/ContentType/FeedType.php
+++ b/src/extensions/Zikula/ContentModule/ContentType/FeedType.php
@@ -90,6 +90,9 @@ public function displayView(): string
             if (count($items) >= $this->data['maxNoOfItems']) {
                 break;
             }
+            if ('http' !== mb_substr($item->get_permalink(), 0, 4)) {
+                continue;
+            }
 
             $items[] = [
                 'title' => $this->decode($item->get_title(), $feedEncoding),
@@ -101,7 +104,7 @@ public function displayView(): string
         $this->data['feed'] = [
             'title' => $this->decode($feed->get_title(), $feedEncoding),
             'description' => strip_tags(html_entity_decode($this->decode($feed->get_description() ?? '', $feedEncoding))),
-            'permalink' => $feed->get_permalink(),
+            'permalink' => 'http' === mb_substr($feed->get_permalink(), 0, 4) ? $feed->get_permalink() : '',
             'items' => $items,
         ];