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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Mime;
use Symfony\Component\Mime\Exception\InvalidArgumentException;
use Symfony\Component\Mime\Exception\LogicException;
/**
* Guesses the MIME type using the PECL extension FileInfo.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*
* @experimental in 4.3
*/
class FileinfoMimeTypeGuesser implements MimeTypeGuesserInterface
{
private $magicFile;
/**
* @param string $magicFile A magic file to use with the finfo instance
*
* @see http://www.php.net/manual/en/function.finfo-open.php
*/
public function __construct(string $magicFile = null)
{
$this->magicFile = $magicFile;
}
/**
* {@inheritdoc}
*/
public function isGuesserSupported(): bool
{
return \function_exists('finfo_open');
}
/**
* {@inheritdoc}
*/
public function guessMimeType(string $path): ?string
{
if (!is_file($path) || !is_readable($path)) {
throw new InvalidArgumentException(sprintf('The "%s" file does not exist or is not readable.', $path));
}
if (!$this->isGuesserSupported()) {
throw new LogicException(sprintf('The "%s" guesser is not supported.', __CLASS__));
}
if (false === $finfo = new \finfo(FILEINFO_MIME_TYPE, $this->magicFile)) {
return null;
}
return $finfo->file($path);
}
}
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