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predis/lib/Predis/Protocol/Text/ResponseBulkHandler.php
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Daniele Alessandri 4e6ed3f26d [phpdoc] Add API documentation.
This is a starting point to add a documentation of the whole set of APIs and
classes of Predis. The next step will be to actually improve and extend it.
2011-10-21 12:54:24 +02:00

54 lines
1.4 KiB
PHP

<?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;
use Predis\Helpers;
use Predis\Protocol\IResponseHandler;
use Predis\Protocol\ProtocolException;
use Predis\Network\IConnectionComposable;
/**
* Implements a response handler for bulk replies using the standard wire
* protocol defined by Redis.
*
* @link http://redis.io/topics/protocol
* @author Daniele Alessandri <suppakilla@gmail.com>
*/
class ResponseBulkHandler implements IResponseHandler
{
/**
* Handles a bulk reply returned by Redis.
*
* @param IConnectionComposable $connection Connection to Redis.
* @param string $lengthString Bytes size of the bulk reply.
* @return string
*/
public function handle(IConnectionComposable $connection, $lengthString)
{
$length = (int) $lengthString;
if ($length != $lengthString) {
Helpers::onCommunicationException(new ProtocolException(
$connection, "Cannot parse '$length' as data length"
));
}
if ($length >= 0) {
return substr($connection->readBytes($length + 2), 0, -2);
}
if ($length == -1) {
return null;
}
}
}