Method parseRelativePath

src/FileRise/Domain/UploadModel.php:599–630

* Parse a resumable relative path into [subDir, fileName]. * Returns [null, null] on invalid input. */

(string $raw)

     * Returns [null, null] on invalid input.
     */
    private static function parseRelativePath(string $raw): array
    {
        $raw = rawurldecode($raw);
        $raw = str_replace('\\', '/', trim($raw));
        $raw = preg_replace('/[\x00-\x1F\x7F]/', '', $raw);
        $raw = ltrim($raw, '/');
        if ($raw === '' || $raw === '.') {
            return ['', ''];
        }
        if (preg_match('~(^|/)\.\.(?:/|$)~', $raw)) {
            return [null, null];
        }
        if (preg_match('~(^|/)\.(?:/|$)~', $raw)) {
            return [null, null];
        }

        $file = basename($raw);
        if (!UploadNamePolicy::isAllowedForWrite($file)) {
            return [null, null];
        }

        $dir = dirname($raw);
        if ($dir === '.' || $dir === '') {
            return ['', $file];
        }

        if (!preg_match(REGEX_FOLDER_NAME, $dir)) {
            return [null, null];
        }

        return [$dir, $file];
    }

    private static function portalMetaFromRequest(): ?array
    {