php和c++socket通讯(基于字节流,二进制)

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研究了一下PHP和C++socket通讯,用C++作为服务器端,php作为客户端进行.

socket通讯是基于协议的,因此,只要双方协议一致就行.

关于协议的选择:我看过网上大部分协议都是在应用层的协议,选用这样的协议很方便,基本上就是字符串传过来,传过去

本次研究的协议算是当今国际化的一个标准做法.length+flag+body(长度+类型+内容)的方式,

total_length	code	flag	length1	string1	length2	string2
总长度	操作类型	标志	字符串1长度	字符串1	字符串2长度	字符串2
4字节	2字节	4字节(暂时无用)	2字节	x字节	2字节	x字节

php实现方式,也很容易,通过pack打包成二进制进行通讯.下面贴一下代码

本地测试主要应用为:发送账号和密码给服务器端

<?php

class Byte{

    //长度

    private $length=0;  

    private $byte='';

    //操作码

    private $code;

    public function setBytePrev($content){

        $this->byte=$content.$this->byte;

    }

    public function getByte(){

        return $this->byte;

    }

    public function getLength(){

        return $this->length;

    }

    public function writeChar($string){

        $this->length+=strlen($string);

        $str=array_map('ord',str_split($string));

        foreach($str as $vo){

            $this->byte.=pack('c',$vo);

        }

        $this->byte.=pack('c','0');

        $this->length++;

    }

    public function writeInt($str){

        $this->length+=4;

        $this->byte.=pack('L',$str);

    }

    public function writeShortInt($interge){

        $this->length+=2;

        $this->byte.=pack('v',$interge);

    }

}

class GameSocket{

    private $socket;

    private $port=9991;

    private $host='192.168.211.231';

    private $byte;

    private $code;

    const CODE_LENGTH=2;

    const FLAG_LENGTH=4;

    public function __set($name,$value){

        $this->$name=$value;

    }

    public function __construct($host='192.168.211.231',$port=9991){

        $this->host=$host;

        $this->port=$port;

        $this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

        if(!$this->socket){

            exit('创建socket失败');

        }

        $result = socket_connect($this->socket,$this->host,$this->port);

        if(!$result){

            exit('连接不上目标主机'.$this->host);

        }

        $this->byte=new Byte();

    }

    public function write($data){

        if(is_string($data)||is_int($data)||is_float($data)){

            $data[]=$data;

        }

        if(is_array($data)){

            foreach($data as $vo){

                $this->byte->writeShortInt(strlen($vo));

                $this->byte->writeChar($vo);

            }

        }

        $this->setPrev();

        $this->send();

    }

    /*

     *设置表头部分

     *表头=length+code+flag

     *length是总长度(4字节)  code操作标志(2字节)  flag暂时无用(4字节)

     */

    private function getHeader(){

        $length=$this->byte->getLength();

        $length=intval($length)+self::CODE_LENGTH+self::FLAG_LENGTH;

        return pack('L',$length);

    }

    private function getCode(){

        return pack('v',$this->code);

    }

    private function getFlag(){

        return pack('L',24);

    }  

    private function setPrev(){

        $this->byte->setBytePrev($this->getHeader().$this->getCode().$this->getFlag());

    }  

    private function send(){

        $result=socket_write($this->socket,$this->byte->getByte());

        if(!$result){

            exit('发送信息失败');

        }

    }

    public function __desctruct(){

        socket_close($this->socket);

    }

}  

$data[]='testzouhao';

$data[]='a';

$gameSocket=new GameSocket();

$gameSocket->code=11;

$gameSocket->write($data);