Fixed trailing slash redirect to use 301 status code [#3127]

CHANGELOG.md

@@ -22,7 +22,7 @@
     * Fixed renaming flex objects key when using file storage
     * Fixed wrong values in Admin pages list [#3214](https://github.com/getgrav/grav/issues/3214)
     * Fixed pipelined asset using different hash when extra asset is added to before/after position [#2781](https://github.com/getgrav/grav/issues/2781)
-    * Only redirect GET/HEAD if `system.pages.redirect_trailing_slash` is true and request has a trailing slash
+    * Fixed trailing slash redirect to only apply to GET/HEAD requests and use 301 status code [#3127](https://github.com/getgrav/grav/issues/3127)
 
 # v1.7.5
 ## 02/01/2021

system/src/Grav/Common/Processors/InitializeProcessor.php

@@ -425,7 +425,8 @@ class InitializeProcessor extends ProcessorBase
         $root = $this->container['uri']->rootUrl();
 
         if ($path !== $root && $path !== $root . '/' && Utils::endsWith($path, '/')) {
-            return $this->container->getRedirectResponse((string)$uri->withPath(rtrim($path, '/')));
+            // Use permanent redirect for SEO reasons.
+            return $this->container->getRedirectResponse((string)$uri->withPath(rtrim($path, '/')), 301);
         }
 
         return null;