diff --git a/src/Symfony/Component/Validator/Constraints/FileValidator.php b/src/Symfony/Component/Validator/Constraints/FileValidator.php
index 52e937944188b..31218c2020fa8 100644
--- a/src/Symfony/Component/Validator/Constraints/FileValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/FileValidator.php
@@ -13,8 +13,10 @@
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;
@@ -170,12 +172,17 @@ public function validate($value, Constraint $constraint)
}
if ($constraint->mimeTypes) {
- if (!$value instanceof FileObject) {
- $value = new FileObject($value);
+ 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;
- $mime = $value->getMimeType();
foreach ($mimeTypes as $mimeType) {
if ($mimeType === $mime) {
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