如何从Laravel核心源代码覆盖/扩展Broadcasters / Broadcaster.php？

Question

我写了Illuminate/Broadcasting/Broadcasters/Broadcaster.php的扩展名，以便可以使用自定义函数（retrieveUser()）。

我如何让Laravel代替原始版本使用它？

到目前为止，我已经尝试将类保存在app / Providers目录和新的app/Extensions目录中。

我尝试从config\app.php调用新类，但我要么得到：

  

类不存在

或：

  

调用未定义的方法isDeferred（）

我还尝试过创建服务提供商来调用它。

我还尝试创建一个自定义应用程序，将默认应用程序扩展为described here。但是，默认应用程序中似乎没有对Illuminate/Broadcasting的引用，甚至可以覆盖。

这是新班级：

<?php

namespace App\Extensions;

use Illuminate\Support\Arr;
use Illuminate\Broadcasting\Broadcasters\Broadcaster as Broadcaster;
use App\User;
use Illuminate\Support\Facades\Crypt;

class EncryptedBroadcaster extends Broadcaster
{
    protected function retrieveUser($request, $channel)
    {
        $options = $this->retrieveChannelOptions($channel);

        $guards = $options['guards'] ?? null;

        if (is_null($guards)) {

            $authorization = $request->header('Authorization');
            $id = Crypt::decrypt($token);
            $user = User::find($id);
            return $user;
        }

        foreach (Arr::wrap($guards) as $guard) {
            if ($user = $request->user($guard)) {
                return $user;
            }
        }
    }


    public function auth($request)
    {
        $channelName = $this->normalizeChannelName($request->channel_name);

        if ($this->isGuardedChannel($request->channel_name) &&
            ! $this->retrieveUser($request, $channelName)) {
            throw new AccessDeniedHttpException;
        }

        return parent::verifyUserCanAccessChannel(
            $request, $channelName
        );
    }

    public function validAuthenticationResponse($request, $result)
    {
        if (is_bool($result)) {
            return json_encode($result);
        }

        $channelName = $this->normalizeChannelName($request->channel_name);

        return json_encode(['channel_data' => [
            'user_id' => $this->retrieveUser($request, $channelName)->getAuthIdentifier(),
            'user_info' => $result,
        ]]);
    }

    public function broadcast(array $channels, $event, array $payload = [])
    {
        $connection = $this->redis->connection($this->connection);

        $payload = json_encode([
            'event' => $event,
            'data' => $payload,
            'socket' => Arr::pull($payload, 'socket'),
        ]);

        foreach ($this->formatChannels($channels) as $channel) {
            $connection->publish($channel, $payload);
        }
    }

}

这是我尝试在config/app.php中调用它的地方：

'providers' => [

        // other existing providers ....

        App\Providers\EncryptedBroadcaster::class,

    ],