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FileinfoMimeTypeGuesser.php
* * 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
*/ class FileinfoMimeTypeGuesser implements MimeTypeGuesserInterface { private ?string $magicFile; /** * @param string|null $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; } public function isGuesserSupported(): bool { return \function_exists('finfo_open'); } 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; } $mimeType = $finfo->file($path); if ($mimeType && 0 === (\strlen($mimeType) % 2)) { $mimeStart = substr($mimeType, 0, \strlen($mimeType) >> 1); $mimeType = $mimeStart.$mimeStart === $mimeType ? $mimeStart : $mimeType; } return $mimeType; } }