Php 使用magento2将尾部斜杠添加到url中

如何在没有指定文件（301重定向）的情况下使用magento2添加url的尾部斜杠，而不使用mod_rewrite，仅在代码中。

app/code/your_vendor/your_module/etc/frontend/events.xml

app/code/your_vendor/your_module/Observer/CustomPredispatch.php

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="controller_action_predispatch_cms_index_index">
        <observer name="unique_name" instance="your_vendor\your_module\Observer\CustomPredispatch" />
    </event>
</config>

<?php

namespace your_vendor\your_module\Observer;

use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;

class CustomPredispatch implements ObserverInterface
{
    public function execute(Observer $observer)
    {
        $request = $observer->getEvent()->getRequest();
        if(substr($request->getRequestUri(), -1) !== '/'){
            $observer->getEvent()->getControllerAction()->getResponse()->setRedirect($request->getRequestUri() . '/', 301)->sendResponse();
        }
    }

}