62 lines
1.4 KiB
PHP
62 lines
1.4 KiB
PHP
<?php
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/**
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* This file is part of workerman.
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the MIT-LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @author walkor<walkor@workerman.net>
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* @copyright walkor<walkor@workerman.net>
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* @link http://www.workerman.net/
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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namespace Workerman\Protocols;
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use Workerman\Connection\TcpConnection;
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/**
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* Frame Protocol.
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*/
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class Frame
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{
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/**
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* Check the integrity of the package.
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*
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* @param string $buffer
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* @param TcpConnection $connection
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* @return int
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*/
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public static function input($buffer, TcpConnection $connection)
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{
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if (\strlen($buffer) < 4) {
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return 0;
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}
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$unpack_data = \unpack('Ntotal_length', $buffer);
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return $unpack_data['total_length'];
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}
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/**
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* Decode.
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*
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* @param string $buffer
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* @return string
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*/
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public static function decode($buffer)
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{
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return \substr($buffer, 4);
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}
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/**
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* Encode.
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*
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* @param string $buffer
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* @return string
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*/
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public static function encode($buffer)
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{
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$total_length = 4 + \strlen($buffer);
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return \pack('N', $total_length) . $buffer;
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}
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}
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