php socket

Posted 2021-01-25 飞翔的贺兰猪

server.php

<?php
class SocketService
{
    private $address  = ‘0.0.0.0‘;
    private $port = 8083;
    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();
$sock->run();
?>

client.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://127.0.0.1:8083");


        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>