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- Veröffentlicht
- 28.08.2024
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FileinfoMimeTypeGuesser.php
01 <?php
02
03 /*
04 * This file is part of the Symfony package.
05 *
06 * (c) Fabien Potencier <fabien@symfony.com>
07 *
08 * For the full copyright and license information, please view the LICENSE
09 * file that was distributed with this source code.
10 */
11
12 namespace Symfony\Component\HttpFoundation\File\MimeType;
13
14 use Symfony\Component\HttpFoundation\File\Exception\AccessDeniedException;
15 use Symfony\Component\HttpFoundation\File\Exception\FileNotFoundException;
16
17 /**
18 * Guesses the mime type using the PECL extension FileInfo.
19 *
20 * @author Bernhard Schussek <bschussek@gmail.com>
21 */
22 class FileinfoMimeTypeGuesser implements MimeTypeGuesserInterface
23 {
24 private $magicFile;
25
26 /**
27 * @param string $magicFile A magic file to use with the finfo instance
28 *
29 * @see https://php.net/finfo-open
30 */
31 public function __construct($magicFile = null)
32 {
33 $this->magicFile = $magicFile;
34 }
35
36 /**
37 * Returns whether this guesser is supported on the current OS/PHP setup.
38 *
39 * @return bool
40 */
41 public static function isSupported()
42 {
43 return \function_exists('finfo_open');
44 }
45
46 /**
47 * {@inheritdoc}
48 */
49 public function guess($path)
50 {
51 if (!is_file($path)) {
52 throw new FileNotFoundException($path);
53 }
54
55 if (!is_readable($path)) {
56 throw new AccessDeniedException($path);
57 }
58
59 if (!self::isSupported()) {
60 return null;
61 }
62
63 if (!$finfo = new \finfo(\FILEINFO_MIME_TYPE, $this->magicFile)) {
64 return null;
65 }
66 $mimeType = $finfo->file($path);
67
68 if ($mimeType && 0 === (\strlen($mimeType) % 2)) {
69 $mimeStart = substr($mimeType, 0, \strlen($mimeType) >> 1);
70 $mimeType = $mimeStart.$mimeStart === $mimeType ? $mimeStart : $mimeType;
71 }
72
73 return $mimeType;
74 }
75 }
76