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<?php
/*
* This file is part of the Predis package.
*
* (c) Daniele Alessandri <suppakilla@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Protocol\Text\Handler;
use Predis\CommunicationException;
use Predis\Connection\CompositeConnectionInterface;
use Predis\Protocol\ProtocolException;
/**
* Handler for the bulk response type in the standard Redis wire protocol.
* It translates the payload to a string or a NULL.
*
* @link http://redis.io/topics/protocol
*
* @author Daniele Alessandri <suppakilla@gmail.com>
*/
class BulkResponse implements ResponseHandlerInterface
{
/**
* {@inheritdoc}
*/
public function handle(CompositeConnectionInterface $connection, $payload)
{
$length = (int) $payload;
if ("$length" !== $payload) {
CommunicationException::handle(new ProtocolException(
$connection, "Cannot parse '$payload' as a valid length for a bulk response."
));
}
if ($length >= 0) {
return substr($connection->readBuffer($length + 2), 0, -2);
}
if ($length == -1) {
return;
}
CommunicationException::handle(new ProtocolException(
$connection, "Value '$payload' is not a valid length for a bulk response."
));
return;
}
}