Can Ditto display the file size of a web linked file?

<?php

// outputs e.g.  somefile.txt: 1024 bytes

$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';

?>

<?php

$file = isset($file) ? $file : '';

if ($file) {
	return filesize($file) . ' bytes';
} else {
	return '';
}	

?>

[!fileSize? &file=`assets/files/index.html`!] 

// snippet fSize
// example usage: [!fSize? &fn=`assets/images/austinpowers-01.jpg`!]

$output = null;

// from: http://ch2.php.net/manual/en/function.filesize.php#77518
function size_readable ($size, $retstring = null) {
        $sizes = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');
        if ($retstring === null) { $retstring = '%01.2f %s'; }
        $lastsizestring = end($sizes);
        foreach ($sizes as $sizestring) {
                if ($size < 1024) { break; }
                if ($sizestring != $lastsizestring) { $size /= 1024; }
        }
        if ($sizestring == $sizes[0]) { $retstring = '%01d %s'; } // Bytes aren't normally fractional
        return sprintf($retstring, $size, $sizestring);
}


if($fn) {
	if( !stristr($fn, '.htaccess') && !stristr($fn, '.php') && !stristr($fn, '.inc') && !stristr($fn, '.htm') ) {
		$fullPath = $modx->config['base_path'] . $fn;
		if(file_exists($fullPath)) {
			$fsc = filesize($fullPath);
			$fs = size_readable($fsc);
			$baseURL = MODX_BASE_URL;
			$shortFN = basename($fn);
			$output = "<a href='$baseURL$fn' title='download $fn ($fs)'>$shortFN ($fs)</a><br />";
			return($output);
		}
	}
}