FileinfoMimeTypeGuesser.php

<?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\HttpFoundation\File\MimeType;

use Symfony\Component\HttpFoundation\File\Exception\FileNotFoundException;
use Symfony\Component\HttpFoundation\File\Exception\AccessDeniedException;

/**
 * Guesses the mime type using the PECL extension FileInfo
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class FileinfoMimeTypeGuesser implements MimeTypeGuesserInterface {

  /**
   * Returns whether this guesser is supported on the current OS/PHP setup
   *
   * @return Boolean
   */
  public static function isSupported() {
    return function_exists('finfo_open');
  }

  /**
   * {@inheritdoc}
   */
  public function guess($path) {
    if (!is_file($path)) {
      throw new FileNotFoundException($path);
    }
    if (!is_readable($path)) {
      throw new AccessDeniedException($path);
    }
    if (!self::isSupported()) {
      return null;
    }
    if (!($finfo = new \finfo(FILEINFO_MIME_TYPE))) {
      return null;
    }
    return $finfo
      ->file($path);
  }

}