Laravel+swoole 实现websocket长链接

需要使用 swoole 扩展

我使用的是 swoole 5.x

start 方法启动服务 和 定时器

调整 listenQueue 定时器可以降低消息通讯延迟

定时器会自动推送队列里面的消息

testMessage 方法测试给指定用户推送消息

使用 laravel console 启动

<?php

namespace App\Console\Commands;

use App\Services\SocketService;
use Illuminate\Console\Command;

class WsServer extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'app:wsServer';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Command description';

    /**
     * Execute the console command.
     */
    public function handle()
    {

        $SocketService = new SocketService();

        $SocketService->start();

    }
}
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socket 服务实现代码

<?php

namespace App\Services;

use Swoole\WebSocket\Server;
use Swoole\Timer;
use Illuminate\Support\Facades\Redis;
use RedisException;
use Swoole\Http\Request;

class SocketService
{

    public $port = 9501;

    public $server;

    public $links;

    public $cmds = [];

    public function __construct ()
    {
        $this->links = collect([]);

        $this->server = new Server("0.0.0.0", env('APP_SOCKET_PORT', $this->port ));

        $this->server->on( 'open', function (Server $server, Request $request){
            $this->open( $server, $request );
        } );

        $this->server->on( 'message', function (Server $server, $frame){
            $this->message( $server, $frame );
        } );

        $this->server->on( 'close', function (Server $server, $fd){
            $this->close( $server, $fd );
        } );
    }

    public function start()
    {
        $this->linkManage();

        $this->listenQueue();

        $this->server->start();
    }

    public function print( $message, $level = 'info' )
    {
        if( is_array($message) || is_object($message) ){
            $message = json_encode($message, 320);
        }

        print_r( "[". date("Y-m-d H:i:s") ."] " . $level . ' ' . $message . "\n" );
    }

    public function linkManage()
    {
        Timer::tick( 100, function (){
            //var_dump( "listenQueue while: " . json_encode($this->cmds, 320) );

            $cmd = array_shift( $this->cmds );
            if( $cmd ){
                switch ( $cmd['operate'] ){

                    case 'open':
                        // 活跃
                        $this->links->push( [ "fd" => $cmd['fd'], "user_id" => intval($cmd['user_id']??0), 'updated_at' => date("Y-m-d H:i:s") ] );

                        $this->print( "添加客户端：fd = " . json_encode($cmd, 320)  );

                        break;

                    case 'close':

                        $newLinks = [];
                        foreach ( $this->links as $link ){
                            if( $link['fd'] == $cmd['fd'] ){
                                continue;
                            }
                            $newLinks[] = $link;
                        }

                        $this->links = collect( $newLinks );

                        $this->print( "删除客户端：fd = " . json_encode($cmd, 320) );

                        break;

                    case 'heartbeat':
                        $newLinks = [];
                        foreach ( $this->links as $link ){
                            if( $link['fd'] == $cmd['fd'] ){
                                $link['updated_at'] = date("Y-m-d H:i:s");
                            }
                            $newLinks[] = $link;
                        }
                        $this->links = collect( $newLinks );
                        break;

                }

                // $this->print( "连接数量是：" . $this->links->count() );
                // $this->print( "连接数量是：" . $this->links->toJson() );
            }

            $newLinks = [];
            foreach ( $this->links as $link ){
                if( strtotime( $link['updated_at'] ) < (time() - 60) ){
                    $this->print( "长时间未心跳，删除客户端：fd = " . json_encode($link, 320) );
                    if( $this->server->isEstablished( $link['fd'] ) ){
                        $this->disconnect( $link['fd'], '未进行心跳' );
                    }
                    continue;
                }
                $newLinks[] = $link;
            }
            $this->links = collect( $newLinks );

        } );
    }

    public function listenQueue()
    {

        Timer::tick( 1000, function (){
            // Redis::rpush( "SocketService:listenQueue", serialize(["hahah"]) )
            try{
                $element = Redis::lpop('SocketService:listenQueue');
                if( $element ){

                    $this->print( "listenQueue 有新的信息哦：" . $element );

                    $data = unserialize($element);

                    if( ! empty( $data['user_id']) ){

                        $links = $this->links->where( "user_id", $data['user_id'] )->values()->all();

                        if( empty($links) ){
                            $this->print( "没有在线用户：user_id = " . json_encode($data, 320) );

                            //var_export( $this->links );
                            //var_export( $links );

                        }

                        foreach ( $links as $link ){
                            if( ! $this->server->isEstablished( $link['fd'] ) ){
                                array_push( $this->cmds, [ 'operate' => 'close', 'fd' => $link['fd'] ] );
                                continue;
                            }

                            try{
                                // 生成消息数据
                                $message = $this->makeMessage( $data['data'], $data['type'], $data['message'] );
                                // 开始推送
                                $this->runPush( $link['fd'], $message );

                            }catch (\Throwable $e){

                                $this->print( "数据推送异常：" . json_encode([ $e->getMessage(),$e->getLine(), $e->getFile() ], 320) );

                            }

                        }
                    }

                }
            }catch (RedisException $e){
                Redis::connect();
            }
        });

    }

    public function open( Server $server, Request $request )
    {
        $params = $request->get;

        if( empty( $params['user_id'] ) ){
            $this->disconnect( $request->fd, '缺少用户信息' );
            return true;
        }

        array_push( $this->cmds, [ 'operate' => 'open', 'fd' => $request->fd, 'user_id' => $params['user_id'] ] );

        // 生成消息数据
        $message = $this->makeMessage( [ 'fd' => $request->fd ], "connectionSuccessful", "连接成功" );
        // 开始推送
        $this->runPush( $request->fd, $message );

        $this->print( "server: handshake success with fd{$request->fd} " );

    }

    public function message( Server $server, $frame )
    {
        //
        $data = json_decode( $frame->data, true );

        if( is_array( $data ) ){
            if( $data['type'] == "ping" ){
                array_push( $this->cmds, [ 'operate' => 'heartbeat', 'fd' => $frame->fd ] );
                $this->server->push( $frame->fd, json_encode( [ "type" => "pong" ] , 320 ) );
            }else{

                $this->print( "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish} " );

            }
        }

    }

    public function close(Server $server, $fd)
    {
        array_push( $this->cmds, [ 'operate' => 'close', 'fd' => $fd ] );

        $this->print( "client {$fd} closed " );

    }

    public function push( $fd, string $data )
    {
        $this->server->push($fd, $data);
    }

    public function disconnect(int $fd, string $reason = '', int $code = SWOOLE_WEBSOCKET_CLOSE_NORMAL)
    {
        $this->server->disconnect($fd, $code, $reason);
    }

    public function makeMessage( array $data, $type = "", $message = "" )
    {
        return [ 'type' => $type, "message" => $message, "data" => $data ];
    }

    public function runPush( $fd, $message )
    {
        $this->print( "推送消息： {$fd} - " .  json_encode(  $message, 320 ) );
        $this->server->push( $fd, json_encode( $message , 320 ) );
    }

    /**
     * App\Services\SocketService::testMessage( 92 )
     * @param $user_id
     * @return void
     */
    public static function testMessage( $user_id )
    {
        Redis::rpush( "SocketService:listenQueue", serialize([
            "user_id" => $user_id,
            "type" =>  "testMessage", "message" => "测试消息", "data" => [
                "hello world！"
            ],
        ]) );
    }



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