How to download pdf file magento2?

Magento2 has a built-in script for any kind of file download, we can use the below code for file downloads:

<?php
/**
 * Magemonkeys.
 *
 * @category  Magemonkeys
 *
 * @author    Magemonkeys
 * @copyright Copyright (c) 2020 Magemonkeys (https://magemonkeys.com/)
 */

namespace Magemonkeys\Download\Controller\Download;

use Magento\Framework\App\Action\Context;

/**
 * file download controller.
 */
class Index extends \Magento\Framework\App\Action\Action
{
    /**
     * @var Magento\Framework\App\Response\Http\FileFactory
     */
    protected $_downloader;

    /**
     * @var Magento\Framework\Filesystem\DirectoryList
     */
    protected $directory;

    /**
     * @param Context     $context
     * @param PageFactory $resultPageFactory
     */
    public function __construct(
        Context $context,
        \Magento\Framework\App\Response\Http\FileFactory $fileFactory,
        \Magento\Framework\Filesystem\DirectoryList $directory
    ) {
        $this->_downloader =  $fileFactory;
        $this->directory = $directory;
        parent::__construct($context);
    }

    public function execute()
    {
        $fileName = $this->getRequest()->getParam('fileName');
        $file = $this->directory->getPath("media")."/FilePath/".$fileName;
        // do your validations

        /**
         * do file download
         */
        return $this->_downloader->create(
            $fileName,
            @file_get_contents($file)
        );
    }
}

<?php

/**

* Magemonkeys.

* @category Magemonkeys

* @author Magemonkeys

namespace Magemonkeys\Download\Controller\Download;

use Magento\Framework\App\Action\Context;

/**

* file download controller.

class Index extends \Magento\Framework\App\Action\Action

{

/**

* @var Magento\Framework\App\Response\Http\FileFactory

protected $_downloader;

/**

* @var Magento\Framework\Filesystem\DirectoryList

protected $directory;

/**

* @param Context $context

* @param PageFactory $resultPageFactory

public function __construct(

Context $context,

\Magento\Framework\App\Response\Http\FileFactory $fileFactory,

\Magento\Framework\Filesystem\DirectoryList $directory

) {

$this->_downloader = $fileFactory;

$this->directory = $directory;

parent::__construct($context);

}

public function execute()

{

$fileName = $this->getRequest()->getParam('fileName');

$file = $this->directory->getPath("media")."/FilePath/".$fileName;

// do your validations

/**

* do file download

return $this->_downloader->create(

$fileName,

@file_get_contents($file)

);

}

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