Thinkphp6+Workerman訊息推送

業務需求示例：系統后臺監聽有新的商品訂單，新訊息等的通知，推送給所有登陸系統的用戶，

邏輯：使用websocket建立連接，并設定定時器發送心跳保持連接不被斷開，建立連接后，php端需要設定心跳時間，判斷mysql業務表是否有新記錄或者訂單，如果有就推送訊息給所有登陸系統用戶，并更新該記錄已推送，

### 1.composer先安裝workerman組件

composer require topthink/think-worker`

### 2.配置

- worker配置 `config/worker_server.php`

// 擴展自身需要的配置

'protocol'       => 'websocket', // 協議 支持 tcp udp unix http websocket text
'host'           => '0.0.0.0', // 監聽地址
'port'           => 2346, // 監聽埠
'socket'         => '', // 完整監聽地址
'context'        => [], // socket 背景關系選項
'worker_class'   => 'app\work\Push', // 自定義Workerman服務類名 支持陣列定義多個服務

- worker實作 `app/work/Push.php`

###

<?php
namespace app\work;
use think\worker\Server;
use Workerman\Lib\Timer;
use think\facade\Db;
class Push extends Server
{
    protected $socket = 'http://0.0.0.0:2346';   //埠自行修改

    protected static $heartbeat_time    =   55;

    public function onWorkerStart($worker){
        //查看是否有新的充值或提現訂單，有就推送給所有用戶
        Timer::add(3, function()use($worker){

            $time_now   =   time();
            $hasNewDepositOrder   =   Db::name('deposit_order')->where('order_status',0)->where('is_push',0)->order('id desc')->count('id');
            $system_listener    =   Db::name('system_listener')->cache(true)->order('id desc')->select()->toArray();

            if($hasNewDepositOrder){
                $depositOrderInfo   =   Db::name('deposit_order')->where('order_status',0)->where('is_push',0)->order('id desc')->find();
                $data   =   ['creatTime'=>$depositOrderInfo['create_time'],'money'=>$depositOrderInfo['pay_amount'],'type'=>'deposit','system_listener'=>$system_listener];
                foreach($worker->connections as $connection) {
                    if(empty($connection->lastMessageTime)){
                        $connection->lastMessageTime =   $time_now;
                    }

                    if($time_now-$connection->lastMessageTime > self::$heartbeat_time){
                        $connection->close();
                    }

                    $connection->send(json_encode($data));
                }

               Db::name('deposit_order')->where('id',$depositOrderInfo['id'])->save(['is_push'=>1]);
            }else{
                foreach($worker->connections as $connection) {
                    if(empty($connection->lastMessageTime)){
                        $connection->lastMessageTime = $time_now;
                        continue;
                    }

                    if($time_now-$connection->lastMessageTime > self::$heartbeat_time){      //連接超時
                        $connection->close();
                    }
                }
            }
        });
    }

### 運行

`php think worker:server` reload|restart|stop|status

### websokcet實作

<script>
let ws = new WebSocket("ws://127.0.0.1:2346")

ws.onopen = function() {  //系結連接事件
    console.log("連接成功");
    //每30秒發送一次心跳
    setInterval(function(){
        ws.send(JSON.stringify({'type':"peng"}));
        console.log('發送心跳...');

    },30000)

};

ws.onmessage = function(evt) {//系結收到訊息事件
    data = JSON.parse(evt.data)
    console.log(data);
    //這里處理收到的訊息, type型別有兩種: connectin、deposit如果有deposit要提示有新的訂單

};


ws.onclose = function(evt) { //系結關倍訓斷開連接事件
　　console.log("連接已關閉");
};
</script>