Magento2 : Mini cart removeItem is not working

Question

I have a magento2 live store, that was working properly. But today mini cart remove item functionality stopped working.

When I checked in developer mode, I found that the Request Url /checkout/sidebar/removeItem/ returning 302 found response status.

How to resolve this issue?

Answer 1

Create Vendor/Module/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
  <preference for="Magento\Checkout\Controller\Sidebar\RemoveItem" type="Vendor\Module\Controller\Sidebar\RemoveItem" />
</config>

Create Vendor/Module/Controller/Sidebar/RemoveItem.php

<?php
namespace Vendor\Module\Controller\Sidebar;

class RemoveItem extends \Magento\Checkout\Controller\Sidebar\RemoveItem
{

    public function execute()
    {
        $itemId = (int)$this->getRequest()->getParam('item_id');
        try {
            $this->sidebar->checkQuoteItem($itemId);
            $this->sidebar->removeQuoteItem($itemId);
            return $this->jsonResponse();
        } catch (\Magento\Framework\Exception\LocalizedException $e) {
            return $this->jsonResponse($e->getMessage());
        } catch (\Exception $e) {
            $this->logger->critical($e);
            return $this->jsonResponse($e->getMessage());
        }
    }
}

Answer 2

Background:

In my case, I found out form_key was coming null in parms. Due to which below condition in execute() method

if (!$this->getFormKeyValidator()->validate($this->getRequest())) {
            return $this->resultRedirectFactory->create()->setPath('*/cart/');
        }

stops action of removing item from mini cart dropdown.

I also noticed form_key was part of cookies. The only problem was it was not getting sent as Form Data.

Solution:

I solved it by creating before plugin for execute() method of class Magento\Checkout\Controller\Sidebar\RemoveItem

In plugin, I got form_key from cookies and setted it in param and BOOM

use Magento\Framework\App\RequestInterface;

class RemoveItem
{
    protected $_request;

    public function __construct(RequestInterface $request)
    {
        $this->_request = $request;
    }

    public function beforeExecute(
        \Magento\Checkout\Controller\Sidebar\RemoveItem $subject
    ):array
    {
        if (!$this->_request->getParam('form_key')) {
            $formKey = $this->_request->getCookie('form_key', null);
            $this->_request->setParams(['form_key'=>$formKey]);
        }
        return [];
    }
}