php socket简单入门

<?php
/**
 * Created by PhpStorm.
 * User: chenygd
 * Date: 2019/8/19
 * Time: 11:31
 */

ini_set("display_errors",true);
error_reporting(E_ALL);
include "service.php";
$service = new Service("0.0.0.0",8090);

$service->listen(function ($c){
    var_dump($c);
    return "hello";
});
?>
<?php

class Service
{

    public $port;
    public $ip;
    protected $server;

    public function __construct($ip = '0.0.0.0', $port)
    {
        $this->ip = $ip;
        $this->port = $port;
        $this->createSocket(); //创建一个通讯节点
    }

    public function listen($callback)
    {
        if(!is_callable($callback)){
            throw  new Exception('不是闭包，请传递正确的参数');
        }

        while (true) {
            $client = socket_accept($this->server); //等待客户端接入，返回的是客户端的连接
            $buf = socket_read($client, 1024); //读取客户端内容
            //请求过滤
            if(empty($this->checkRule("/GET\s(.*?)\sHTTP\/1.1/i",$buf))){
                socket_close($client);
                return;
            }
            //响应
            $response= call_user_func($callback,$buf); //回调$callback函数
            $this->response($response,$client);
            usleep(1000); //微妙为单位，1000000 微妙等于1秒
            socket_close($client);
        }
        socket_close($this->server);
    }

    //io 复用
    //epoll 模型
    //多进程
    protected function createSocket()
    {
        $this->server = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
        //bind
        socket_set_option($this->server, SOL_SOCKET, SO_REUSEADDR, 1); //复用还处于 TIME_WAIT
        socket_bind($this->server, $this->ip, $this->port); //细节性的处理自行完成
        socket_listen($this->server); //开始监听


    }

    /**
     * 协议过滤
     * @param $reg
     * @param $buf
     * @return mixed
     */
    protected function checkRule($reg,$buf){

        if(preg_match($reg,$buf,$matchs)){
            return $matchs;
        }
        return false;

    }

    //请求处理类
    public  function  request($buf){
        //1.只允许http协议访问



//        if(preg_match("GET\s(.*?)\sHTTP/1.1",$buf,$matchs)){ //匹配到http协议
//            return true;
//        }else{
//            return false;
//        }
        //2.过滤掉/favicon.ico


        //3.获取请求信息

    }

    protected  function response($content,$client){

        //返回数据给客户端,响应处理
        $string="HTTP/1.1 200 OK\r\n";
        $string.="Content-Type: text/html;charset=utf-8\r\n";
        $string.="Content-Length: ".strlen($content)."\r\n\r\n";
        socket_write($client,$string.$content);
    }
}