• php webSocket入门——服务端与客户端通信(不支持中文)


     项目文件夹:lite

    1、serveSocket.php

    <?php
    
    class SocketService
    {
        private $address;
        private $port;
        private $_sockets;
        public function __construct($address = '', $port='')
        {
                if(!empty($address)){
                    $this->address = $address;
                }
                if(!empty($port)) {
                    $this->port = $port;
                }
        }
     
        public function service(){
            //获取tcp协议号码。
            $tcp = getprotobyname("tcp");
            $sock = socket_create(AF_INET, SOCK_STREAM, $tcp);
            socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
            if($sock < 0)
            {
                throw new Exception("failed to create socket: ".socket_strerror($sock)."
    ");
            }
            socket_bind($sock, $this->address, $this->port);
            socket_listen($sock, $this->port);
            echo "listen on $this->address $this->port ... 
    ";
            $this->_sockets = $sock;
        }
     
        public function run(){
            $this->service();
            $clients[] = $this->_sockets;
            while (true){
                $changes = $clients;
                $write = NULL;
                $except = NULL;
                socket_select($changes,  $write,  $except, NULL);
                foreach ($changes as $key => $_sock){
                    if($this->_sockets == $_sock){ //判断是不是新接入的socket
                        if(($newClient = socket_accept($_sock))  === false){
                            die('failed to accept socket: '.socket_strerror($_sock)."
    ");
                        }
                        $line = trim(socket_read($newClient, 1024));
                        $this->handshaking($newClient, $line);
                        //获取client ip
                        socket_getpeername ($newClient, $ip);
                        $clients[$ip] = $newClient;
                        echo  "Client ip:{$ip}   
    ";
                        echo "Client msg:{$line} 
    ";
                    } else {
                        socket_recv($_sock, $buffer,  2048, 0);
                        $msg = $this->message($buffer);
                        //在这里业务代码
                        echo "{$key} clinet msg:",$msg,"
    ";
                        fwrite(STDOUT, 'Please input a argument:');
                        $response = trim(fgets(STDIN));
                        $this->send($_sock, $response);
                        echo "{$key} response to Client:".$response,"
    ";
                    }
                }
            }
        }
     
        /**
         * 握手处理
         * @param $newClient socket
         * @return int  接收到的信息
         */
        public function handshaking($newClient, $line){
     
            $headers = array();
            $lines = preg_split("/
    /", $line);
            foreach($lines as $line)
            {
                $line = chop($line);
                if(preg_match('/A(S+): (.*)z/', $line, $matches))
                {
                    $headers[$matches[1]] = $matches[2];
                }
            }
            $secKey = $headers['Sec-WebSocket-Key'];
            $secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
            $upgrade  = "HTTP/1.1 101 Web Socket Protocol Handshake
    " .
                "Upgrade: websocket
    " .
                "Connection: Upgrade
    " .
                "WebSocket-Origin: $this->address
    " .
                "WebSocket-Location: ws://$this->address:$this->port/websocket/websocket
    ".
                "Sec-WebSocket-Accept:$secAccept
    
    ";
            return socket_write($newClient, $upgrade, strlen($upgrade));
        }
     
        /**
         * 解析接收数据
         * @param $buffer
         * @return null|string
         */
        public function message($buffer){
            $len = $masks = $data = $decoded = null;
            $len = ord($buffer[1]) & 127;
            if ($len === 126)  {
                $masks = substr($buffer, 4, 4);
                $data = substr($buffer, 8);
            } else if ($len === 127)  {
                $masks = substr($buffer, 10, 4);
                $data = substr($buffer, 14);
            } else  {
                $masks = substr($buffer, 2, 4);
                $data = substr($buffer, 6);
            }
            for ($index = 0; $index < strlen($data); $index++) {
                $decoded .= $data[$index] ^ $masks[$index % 4];
            }
            return $decoded;
        }
     
        /**
         * 发送数据
         * @param $newClinet 新接入的socket
         * @param $msg   要发送的数据
         * @return int|string
         */
        public function send($newClinet, $msg){
            $msg = $this->frame($msg);
            socket_write($newClinet, $msg, strlen($msg));
        }
     
        public function frame($s) {
            $a = str_split($s, 125);
            if (count($a) == 1) {
                return "x81" . chr(strlen($a[0])) . $a[0];
            }
            $ns = "";
            foreach ($a as $o) {
                $ns .= "x81" . chr(strlen($o)) . $o;
            }
            return $ns;
        }
     
        /**
         * 关闭socket
         */
        public function close(){
            return socket_close($this->_sockets);
        }
    }
     
    $sock = new SocketService('127.0.0.1','9000');
    $sock->run();
    View Code

    2、web.html

    <!doctype html>
    <html lang="en">
     <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width,initial-scale=1, maximum-scale=1, user-scalable=no">
      <title>websocket</title>
     </head>
     <body>
     <input id="text" value="">
     <input type="submit" value="send" onclick="start()">
     <input type="submit" value="close" onclick="close()">
    <div id="msg"></div>
     <script>
        /**
          *0:未连接
          *1:连接成功,可通讯
          *2:正在关闭
          *3:连接已关闭或无法打开
          */
        //创建一个webSocket 实例
        var webSocket  = new  WebSocket("ws://127.0.0.1:9000");
     
     
        webSocket.onerror = function (event){
            onError(event);
        };
     
        // 打开websocket
        webSocket.onopen = function (event){
            onOpen(event);
        };
     
        //监听消息
        webSocket.onmessage = function (event){
            onMessage(event);
        };
     
     
        webSocket.onclose = function (event){
            onClose(event);
        }
     
        //关闭监听websocket
        function onError(event){
            document.getElementById("msg").innerHTML = "<p>close</p>";
            console.log("error"+event.data);
        };
     
        function onOpen(event){
            console.log("open:"+sockState());
            document.getElementById("msg").innerHTML = "<p>Connect to Service</p>";
        };
        
        function onMessage(event){
            console.log("onMessage");
            document.getElementById("msg").innerHTML += "<p>response:"+event.data+"</p>"
        };
     
        function onClose(event){
            document.getElementById("msg").innerHTML = "<p>close</p>";
            console.log("close:"+sockState());
            webSocket.close();
        }
     
        function sockState(){
            var status = ['未连接','连接成功,可通讯','正在关闭','连接已关闭或无法打开'];
                return status[webSocket.readyState];
        }
     
        function start(event){
            console.log(webSocket);
            var msg = document.getElementById('text').value;
            document.getElementById('text').value = '';
            console.log("send:"+sockState());
            console.log("msg="+msg);
            webSocket.send("msg="+msg);
            document.getElementById("msg").innerHTML += "<p>request"+msg+"</p>"
        };
     
        function close(event){
            webSocket.close();
        }
     </script>
     </body>
    </html>
    View Code

    3、打开命令行界面,进入lite目录中,执行php -q serveSocket.php,启动webSocket服务器

    PS:如果提示不支持php命令,说明没有配置环境变量,需要将你当前php的安装目录加入环境变量中——

    4、打开项目web.html页面

    可以看到连接成功,此时命令行界面可以看到握手信息

    5、使用:

    尝试向服务器发送信息:

    这时命令行可以看到:

    ummm.....中文乱码了

    跟客户端发送一下试试?

    发现被迫关闭了websocket

    说明这个demo中发送中文还是有问题的,全英文就没问题。

     但我觉得这个demo对于入门理解websocket的原理,还是很有帮助 : )

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  • 原文地址:https://www.cnblogs.com/mankii/p/11026607.html
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