php实现websocket实时消息推送

<?php
/**
 * created by xwx
 * date: 2017/10/18
 * time: 14:33
 */

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)."\n");
    }
    socket_bind($sock, $this->address, $this->port);
    socket_listen($sock, $this->port);
    echo "listen on $this->address $this->port ... \n";
    $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)."\n");
          }
          $line = trim(socket_read($newclient, 1024));
          $this->handshaking($newclient, $line);
          //获取client ip
          socket_getpeername ($newclient, $ip);
          $clients[$ip] = $newclient;
          echo "client ip:{$ip}  \n";
          echo "client msg:{$line} \n";
        } else {
          socket_recv($_sock, $buffer, 2048, 0);
          $msg = $this->message($buffer);
          //在这里业务代码
          echo "{$key} clinet msg:",$msg,"\n";
          fwrite(stdout, 'please input a argument:');
          $response = trim(fgets(stdin));
          $this->send($_sock, $response);
          echo "{$key} response to client:".$response,"\n";
        }
      }
    }
  }

  /**
   * 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("/\r\n/", $line);
    foreach($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\r\n" .
      "upgrade: websocket\r\n" .
      "connection: upgrade\r\n" .
      "websocket-origin: $this->address\r\n" .
      "websocket-location: ws://$this->address:$this->port/websocket/websocket\r\n".
      "sec-websocket-accept:$secaccept\r\n\r\n";
    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();

<!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://192.168.31.152:8083");


  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>