File Download - Corrupt file

Hi

I've finally got my system downloading a file automatically, I had to re-write how I present the download option to the user - it's displayed in a VueJS component but allows the user to click the filename in a route so the code receives the location of the file and the filename.

My code now reads as follows:-

public function downloadFile($fileName, $location)
{

	$variable = \IDHelpers::getID();

	$ftp = Storage::createFtpDriver([
		'host'     => 'My FTP Server',
		'username' => $this->ftp_username,
		'password' => $this->ftp_password,
		'port'     => '21', // your ftp port
		'timeout'  => '30', // timeout setting
	]);

	// Set file path
	$path_parts = [
		config('tmp_folder'),
		$variable->ID,
	];

	$destination_path = implode('/', $path_parts);
	$destination = implode('/', [public_path(), $destination_path]);
	// Ensure agency destination exists
	\AppHelpers::makeDirectory($destination);
	// Ensure the property destination exists
	\AppHelpers::makeDirectory($destination.'/'.$location);
	// get the file from the ftp server
	$fileContents = ($ftp->get($location.'/'.$fileName));
	//store it in the tmp destination
	$localPath = $destination_path.'/'.$location;
	$localFile = $destination_path.'/'.$location.'/'.$fileName;
	$results = File::put($localFile, $fileContents);
	//
	// Initiate the download
	//
	$destination .= '/' . $location . '/' . $fileName;

	//$file = Storage::get($localFile);

	header('Content-Type: application/octet-stream');
	header("Content-Transfer-Encoding: Binary");
	header("Content-disposition: attachment; filename=\"" . $fileName . "\"");
	header("Content-Length: ".$results);
	readfile($localFile);
	return response()->file($localFile);
}

As I've had to rename stuff in the code for security, be assured the above code works as intended, I can get the file from the ftp location, put it in the tmp location on my server, the only bit that fails is the download, I suspect I've not got the header coded correctly as if I use FileZilla and download the file, it opens without issue, however, if I run the above and try to open the downloaded file, it fails.

Any idea on what setting I have that is incorrect?

Cheers Carl.