From 5c2c1a47cce0eb9971ef437e415e8c5692ac3d8b Mon Sep 17 00:00:00 2001
From: Joshua Ramon Enslin <joshua@museum-digital.de>
Date: Sun, 5 Nov 2023 23:37:28 +0100
Subject: [PATCH] Fully ensure all URL components are present for rewriting

---
 src/MD_STD_IN.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/MD_STD_IN.php b/src/MD_STD_IN.php
index 1ced094..22d7efc 100644
--- a/src/MD_STD_IN.php
+++ b/src/MD_STD_IN.php
@@ -203,7 +203,7 @@ final class MD_STD_IN {
             }
         }
         catch (MDInvalidUrl $e) {
-            if (($parsed = parse_url($input)) === false || empty($parsed['scheme'])) {
+            if (($parsed = parse_url($input)) === false || empty($parsed['scheme']) || empty($parsed['host']) || empty($parsed['path'])) {
                 throw new MDInvalidUrl("Invalid input URL");
             }
             $rewritten = $parsed['scheme'] . '://';
@@ -219,6 +219,8 @@ final class MD_STD_IN {
             }
         }
 
+        if (empty($output)) return '';
+
         // Check for valid schemes
         if (MD_STD::startsWithAny($output, ['https://', 'http://', 'ftp://']) === false) {
             throw new MDInvalidUrl("Invalid input URL");