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