websocket服务器

1、WebSocket协议是基于tcp协议的一种新型的网络协议。它的实现了浏览器与服务器全双工通信-----允许服务器主动发送信息给客户端

2、http协议通信只能有客户端发送请求

服务端：

$server = new SwooleWebSocketServer("0.0.0.0", 9501);

$server->on('open', function (SwooleWebSocketServer $server, $request) {
    echo "server: handshake success with fd{$request->fd}
";
});

$server->on('message', function (SwooleWebSocketServer $server, $frame) {
    echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}
";
    $server->push($frame->fd, "this is server");
});

$server->on('close', function ($ser, $fd) {
    echo "client {$fd} closed
";
});

$server->start();

客户端：

<h1>swooler-websocket测试</h1>
<script>
    var wsurl = "域名:端口号";
    var websocket = new WebSocket(weurl);
//实例对象onopen属性
websocket.ononnpen  = function(evt){
    console.log("connected-swoole-connect");
}
websocket.onmessage = function (evt){
    console.log("server-return-data:"+etv,data);
}
websocket.onclose = functin(evt){
      console.log("close");
}
websocket.onerror = function(evt,e){
console.log("server-error"_etv.data);
}
</script>

 优化的代码：

<?php
class websocket
{
    CONST PORT = 8812;
    CONST HOST = 0.0.0.0;
    public $ws = '';
    public function __construct()
    {
        $this->ws = new swoole_websocket_server('0.0.0.0',8812);
　　　　　$this->ws->set([
　　　　　　'work_num'=>2,
　　　　　　'task_worker_num'=>4
　　　　]);
        //可以看swoole文档,websocketserver
        $this->ws->on("open",[$this,'onOpen']);
        $this->ws->on('message',[$this,'onMessage']);
        $this->ws->on('close',[$this,onclose]);
        $this->ws->on('task',[$this,onTask]);
        $this->ws->on('finish',[$this,onFinish]);
        $this->ws->start();
    }
    /*
    * 监听ws连接事件
    */
    public function onOpen($ws,$request)
    {
        //客户端ID
        var_dump($request->fd);
    }
    public function onMessage($ws,$frame)
    {
        echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}
";
        $data = [
            'task'=>1,
            'frame'=>$frame->fd
        ];
        $ws->task($data);
        //返回给客户端一个数据
        $ws->push($frame->fd, "this is server");
    }
    /*
    *$task_id是任务ID，由swoole扩展内自动生成，用于区分不同的任务。$task_*id和$src_worker_id组合起来才是全局唯一的，不同的worker进程投递的任ID*可能会有相同
    *$src_worker_id来自于哪个worker进程
    *$data 是任务的内容, task 任务异步机制，可以用于一个非常耗时的任务，异步执行
    */
    public function onTask($ws, $task_id, $src_worker_id, $data)
    {
        sleep(10);
        return "task finish";
    }
    /*
    *$task_id是任务的ID
    *$data是任务处理的结果内容
    *task进程的onTask事件中没有调用finish方法或者return结果，worker进程
    *不会触发onFinish
    *执行onFinish逻辑的worker进程与下发task任务的worker进程是同一个进程
    */
    public function onFinish($ws, $task_id, $data)
    {
        echo "task_id:{$task_id}";
        echo "finish_success:{$data}";
    }
    public function onClose($ws,$fd)
    {
        echo "client {$fd} closed
";
    }
}
$obj = new websocket();