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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\Validator\Constraints;
use Symfony\Component\HttpFoundation\File\File as FileObject;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\Mime\MimeTypes;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\LogicException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
use Symfony\Component\Validator\Exception\UnexpectedValueException;
/**
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class FileValidator extends ConstraintValidator
{
public const KB_BYTES = 1000;
public const MB_BYTES = 1000000;
public const KIB_BYTES = 1024;
public const MIB_BYTES = 1048576;
private const SUFFICES = [
1 => 'bytes',
self::KB_BYTES => 'kB',
self::MB_BYTES => 'MB',
self::KIB_BYTES => 'KiB',
self::MIB_BYTES => 'MiB',
];
/**
* {@inheritdoc}
*/
public function validate($value, Constraint $constraint)
{
if (!$constraint instanceof File) {
throw new UnexpectedTypeException($constraint, File::class);
}
if (null === $value || '' === $value) {
return;
}
if ($value instanceof UploadedFile && !$value->isValid()) {
switch ($value->getError()) {
case \UPLOAD_ERR_INI_SIZE:
$iniLimitSize = UploadedFile::getMaxFilesize();
if ($constraint->maxSize && $constraint->maxSize < $iniLimitSize) {
$limitInBytes = $constraint->maxSize;
$binaryFormat = $constraint->binaryFormat;
} else {
$limitInBytes = $iniLimitSize;
$binaryFormat = $constraint->binaryFormat ?? true;
}
[, $limitAsString, $suffix] = $this->factorizeSizes(0, $limitInBytes, $binaryFormat);
$this->context->buildViolation($constraint->uploadIniSizeErrorMessage)
->setParameter('{{ limit }}', $limitAsString)
->setParameter('{{ suffix }}', $suffix)
->setCode((string) \UPLOAD_ERR_INI_SIZE)
->addViolation();
return;
case \UPLOAD_ERR_FORM_SIZE:
$this->context->buildViolation($constraint->uploadFormSizeErrorMessage)
->setCode((string) \UPLOAD_ERR_FORM_SIZE)
->addViolation();
return;
case \UPLOAD_ERR_PARTIAL:
$this->context->buildViolation($constraint->uploadPartialErrorMessage)
->setCode((string) \UPLOAD_ERR_PARTIAL)
->addViolation();
return;
case \UPLOAD_ERR_NO_FILE:
$this->context->buildViolation($constraint->uploadNoFileErrorMessage)
->setCode((string) \UPLOAD_ERR_NO_FILE)
->addViolation();
return;
case \UPLOAD_ERR_NO_TMP_DIR:
$this->context->buildViolation($constraint->uploadNoTmpDirErrorMessage)
->setCode((string) \UPLOAD_ERR_NO_TMP_DIR)
->addViolation();
return;
case \UPLOAD_ERR_CANT_WRITE:
$this->context->buildViolation($constraint->uploadCantWriteErrorMessage)
->setCode((string) \UPLOAD_ERR_CANT_WRITE)
->addViolation();
return;
case \UPLOAD_ERR_EXTENSION:
$this->context->buildViolation($constraint->uploadExtensionErrorMessage)
->setCode((string) \UPLOAD_ERR_EXTENSION)
->addViolation();
return;
default:
$this->context->buildViolation($constraint->uploadErrorMessage)
->setCode((string) $value->getError())
->addViolation();
return;
}
}
if (!is_scalar($value) && !$value instanceof FileObject && !(\is_object($value) && method_exists($value, '__toString'))) {
throw new UnexpectedValueException($value, 'string');
}
$path = $value instanceof FileObject ? $value->getPathname() : (string) $value;
if (!is_file($path)) {
$this->context->buildViolation($constraint->notFoundMessage)
->setParameter('{{ file }}', $this->formatValue($path))
->setCode(File::NOT_FOUND_ERROR)
->addViolation();
return;
}
if (!is_readable($path)) {
$this->context->buildViolation($constraint->notReadableMessage)
->setParameter('{{ file }}', $this->formatValue($path))
->setCode(File::NOT_READABLE_ERROR)
->addViolation();
return;
}
$sizeInBytes = filesize($path);
$basename = $value instanceof UploadedFile ? $value->getClientOriginalName() : basename($path);
if (0 === $sizeInBytes) {
$this->context->buildViolation($constraint->disallowEmptyMessage)
->setParameter('{{ file }}', $this->formatValue($path))
->setParameter('{{ name }}', $this->formatValue($basename))
->setCode(File::EMPTY_ERROR)
->addViolation();
return;
}
if ($constraint->maxSize) {
$limitInBytes = $constraint->maxSize;
if ($sizeInBytes > $limitInBytes) {
[$sizeAsString, $limitAsString, $suffix] = $this->factorizeSizes($sizeInBytes, $limitInBytes, $constraint->binaryFormat);
$this->context->buildViolation($constraint->maxSizeMessage)
->setParameter('{{ file }}', $this->formatValue($path))
->setParameter('{{ size }}', $sizeAsString)
->setParameter('{{ limit }}', $limitAsString)
->setParameter('{{ suffix }}', $suffix)
->setParameter('{{ name }}', $this->formatValue($basename))
->setCode(File::TOO_LARGE_ERROR)
->addViolation();
return;
}
}
if ($constraint->mimeTypes) {
if ($value instanceof FileObject) {
$mime = $value->getMimeType();
} elseif (class_exists(MimeTypes::class)) {
$mime = MimeTypes::getDefault()->guessMimeType($path);
} elseif (!class_exists(FileObject::class)) {
throw new LogicException('You cannot validate the mime-type of files as the Mime component is not installed. Try running "composer require symfony/mime".');
} else {
$mime = (new FileObject($value))->getMimeType();
}
$mimeTypes = (array) $constraint->mimeTypes;
foreach ($mimeTypes as $mimeType) {
if ($mimeType === $mime) {
return;
}
if ($discrete = strstr($mimeType, '/*', true)) {
if (strstr($mime, '/', true) === $discrete) {
return;
}
}
}
$this->context->buildViolation($constraint->mimeTypesMessage)
->setParameter('{{ file }}', $this->formatValue($path))
->setParameter('{{ type }}', $this->formatValue($mime))
->setParameter('{{ types }}', $this->formatValues($mimeTypes))
->setParameter('{{ name }}', $this->formatValue($basename))
->setCode(File::INVALID_MIME_TYPE_ERROR)
->addViolation();
}
}
private static function moreDecimalsThan(string $double, int $numberOfDecimals): bool
{
return \strlen($double) > \strlen(round($double, $numberOfDecimals));
}
/**
* Convert the limit to the smallest possible number
* (i.e. try "MB", then "kB", then "bytes").
*
* @param int|float $limit
*/
private function factorizeSizes(int $size, $limit, bool $binaryFormat): array
{
if ($binaryFormat) {
$coef = self::MIB_BYTES;
$coefFactor = self::KIB_BYTES;
} else {
$coef = self::MB_BYTES;
$coefFactor = self::KB_BYTES;
}
$limitAsString = (string) ($limit / $coef);
// Restrict the limit to 2 decimals (without rounding! we
// need the precise value)
while (self::moreDecimalsThan($limitAsString, 2)) {
$coef /= $coefFactor;
$limitAsString = (string) ($limit / $coef);
}
// Convert size to the same measure, but round to 2 decimals
$sizeAsString = (string) round($size / $coef, 2);
// If the size and limit produce the same string output
// (due to rounding), reduce the coefficient
while ($sizeAsString === $limitAsString) {
$coef /= $coefFactor;
$limitAsString = (string) ($limit / $coef);
$sizeAsString = (string) round($size / $coef, 2);
}
return [$sizeAsString, $limitAsString, self::SUFFICES[$coef]];
}
}