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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\Serializer\Normalizer;
use Symfony\Component\HttpFoundation\File\File;
use Symfony\Component\Mime\MimeTypeGuesserInterface;
use Symfony\Component\Mime\MimeTypes;
use Symfony\Component\Serializer\Exception\InvalidArgumentException;
use Symfony\Component\Serializer\Exception\NotNormalizableValueException;
/**
* Normalizes an {@see \SplFileInfo} object to a data URI.
* Denormalizes a data URI to a {@see \SplFileObject} object.
*
* @author Kévin Dunglas <dunglas@gmail.com>
*/
class DataUriNormalizer implements NormalizerInterface, DenormalizerInterface, CacheableSupportsMethodInterface
{
private static $supportedTypes = [
\SplFileInfo::class => true,
\SplFileObject::class => true,
File::class => true,
];
/**
* @var MimeTypeGuesserInterface|null
*/
private $mimeTypeGuesser;
public function __construct(MimeTypeGuesserInterface $mimeTypeGuesser = null)
{
if (!$mimeTypeGuesser && class_exists(MimeTypes::class)) {
$mimeTypeGuesser = MimeTypes::getDefault();
}
$this->mimeTypeGuesser = $mimeTypeGuesser;
}
/**
* {@inheritdoc}
*/
public function normalize($object, string $format = null, array $context = [])
{
if (!$object instanceof \SplFileInfo) {
throw new InvalidArgumentException('The object must be an instance of "\SplFileInfo".');
}
$mimeType = $this->getMimeType($object);
$splFileObject = $this->extractSplFileObject($object);
$data = '';
$splFileObject->rewind();
while (!$splFileObject->eof()) {
$data .= $splFileObject->fgets();
}
if ('text' === explode('/', $mimeType, 2)[0]) {
return sprintf('data:%s,%s', $mimeType, rawurlencode($data));
}
return sprintf('data:%s;base64,%s', $mimeType, base64_encode($data));
}
/**
* {@inheritdoc}
*/
public function supportsNormalization($data, string $format = null)
{
return $data instanceof \SplFileInfo;
}
/**
* {@inheritdoc}
*
* Regex adapted from Brian Grinstead code.
*
* @see https://gist.github.com/bgrins/6194623
*
* @throws InvalidArgumentException
* @throws NotNormalizableValueException
*/
public function denormalize($data, string $type, string $format = null, array $context = [])
{
if (!preg_match('/^data:([a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}\/[a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}(;[a-z0-9\-]+\=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9\!\$\&\\\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i', $data)) {
throw new NotNormalizableValueException('The provided "data:" URI is not valid.');
}
try {
switch ($type) {
case 'Symfony\Component\HttpFoundation\File\File':
if (!class_exists(File::class)) {
throw new InvalidArgumentException(sprintf('Cannot denormalize to a "%s" without the HttpFoundation component installed. Try running "composer require symfony/http-foundation".', File::class));
}
return new File($data, false);
case 'SplFileObject':
case 'SplFileInfo':
return new \SplFileObject($data);
}
} catch (\RuntimeException $exception) {
throw new NotNormalizableValueException($exception->getMessage(), $exception->getCode(), $exception);
}
throw new InvalidArgumentException(sprintf('The class parameter "%s" is not supported. It must be one of "SplFileInfo", "SplFileObject" or "Symfony\Component\HttpFoundation\File\File".', $type));
}
/**
* {@inheritdoc}
*/
public function supportsDenormalization($data, string $type, string $format = null)
{
return isset(self::$supportedTypes[$type]);
}
/**
* {@inheritdoc}
*/
public function hasCacheableSupportsMethod(): bool
{
return __CLASS__ === \get_class($this);
}
/**
* Gets the mime type of the object. Defaults to application/octet-stream.
*/
private function getMimeType(\SplFileInfo $object): string
{
if ($object instanceof File) {
return $object->getMimeType();
}
if ($this->mimeTypeGuesser && $mimeType = $this->mimeTypeGuesser->guessMimeType($object->getPathname())) {
return $mimeType;
}
return 'application/octet-stream';
}
/**
* Returns the \SplFileObject instance associated with the given \SplFileInfo instance.
*/
private function extractSplFileObject(\SplFileInfo $object): \SplFileObject
{
if ($object instanceof \SplFileObject) {
return $object;
}
return $object->openFile();
}
}
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