fkooman / php-remote-storage

        );

        $documentVersion = $this->remoteStorage->getVersion($path);

        if (null !== $ifMatch && !in_array($documentVersion, $ifMatch)) {

            throw new HttpException('version mismatch', 412);

        }

        if (null !== $ifNoneMatch && in_array('*', $ifNoneMatch) && null !== $documentVersion) {

            throw new HttpException('document already exists', 412);

        // if document does not exist, and we have If-Match header set we should

        // return a 412 instead of a 404

        if (null !== $ifMatch && !in_array($documentVersion, $ifMatch)) {

            throw new HttpException('version mismatch', 412);

        }

        if (null === $documentVersion) {

            throw new HttpException(

        $ifMatch = $this->stripQuotes(

            $request->getHeader('HTTP_IF_MATCH', false, null)

        );

        if (null !== $ifMatch && !in_array($documentVersion, $ifMatch)) {

            throw new HttpException('version mismatch', 412);

        }

        $x = $this->remoteStorage->deleteDocument(

            $path,