From e15b7228d7a498aef7cdc3cf5f483f940d166a10 Mon Sep 17 00:00:00 2001
From: Andrew Welch <andrew@nystudio107.com>
Date: Tue, 17 Dec 2024 12:06:39 -0500
Subject: [PATCH] refactor: If an incoming URL has a trailing slash, preserve
 it for things like the Canonical URL
 ([#1547](https://github.com/nystudio107/craft-seomatic/issues/1547))

---
 src/helpers/UrlHelper.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/helpers/UrlHelper.php b/src/helpers/UrlHelper.php
index 9baabb3c8..926cd4ede 100644
--- a/src/helpers/UrlHelper.php
+++ b/src/helpers/UrlHelper.php
@@ -150,13 +150,17 @@ public static function absoluteUrlWithProtocol($url): string
         }
         // Ensure that any spaces in the URL are encoded
         $url = str_replace(' ', '%20', $url);
-
+        // If the incoming URL has a trailing slash, respect it by preserving it
+        $preserveTrailingSlash = false;
+        if (str_ends_with($url, '/')) {
+            $preserveTrailingSlash = true;
+        }
         // Handle trailing slashes properly for generated URLs
         $generalConfig = Craft::$app->getConfig()->getGeneral();
         if ($generalConfig->addTrailingSlashesToUrls && !preg_match('/(.+\?.*)|(\.[^\/]+$)/', $url)) {
             $url = rtrim($url, '/') . '/';
         }
-        if (!$generalConfig->addTrailingSlashesToUrls) {
+        if (!$generalConfig->addTrailingSlashesToUrls && !$preserveTrailingSlash) {
             $url = rtrim($url, '/');
         }