Merge pull request #42774 from nextcloud/fix/exif-content-provider-stable27

[stable27] fix: handle exif metadata read errors gracefully

Author: st3iny

lib/private/Metadata/Provider/ExifProvider.php

@@ -71,8 +71,9 @@ public function execute(File $file): array {
 		$size->setId($file->getId());
 		$size->setArrayAsValue([]);
 
-		if (!$data) {
-			$sizeResult = getimagesizefromstring($file->getContent());
+		$content = $file->getContent();
+		if (!$data && $content) {
+			$sizeResult = getimagesizefromstring($content);
 			if ($sizeResult !== false) {
 				$size->setArrayAsValue([
 					'width' => $sizeResult[0],
@@ -81,7 +82,7 @@ public function execute(File $file): array {
 
 				$exifData['size'] = $size;
 			}
-		} elseif (array_key_exists('COMPUTED', $data)) {
+		} elseif ($data && array_key_exists('COMPUTED', $data)) {
 			if (array_key_exists('Width', $data['COMPUTED']) && array_key_exists('Height', $data['COMPUTED'])) {
 				$size->setArrayAsValue([
 					'width' => $data['COMPUTED']['Width'],