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<?php |
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namespace SpringboardVR\LaravelAblyBroadcaster; |
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use Illuminate\Broadcasting\Broadcasters\Broadcaster; |
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use Illuminate\Support\Arr; |
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use Illuminate\Support\Str; |
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use Ably\AblyRest; |
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use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException; |
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class AblyBroadcaster extends Broadcaster |
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{ |
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use UseAblyChannelConventions; |
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/** |
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* The AblyRest SDK instance. |
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* |
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* @var \Ably\AblyRest |
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*/ |
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protected $ably; |
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/** |
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* Create a new broadcaster instance. |
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* |
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* @param \Ably\AblyRest $ably |
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* @return void |
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*/ |
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public function __construct(AblyRest $ably) |
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{ |
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$this->ably = $ably; |
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} |
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/** |
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* Authenticate the incoming request for a given channel. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @return mixed |
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* |
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* @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException |
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*/ |
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public function auth($request) |
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{ |
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$channelName = $this->normalizeChannelName($request->channel_name); |
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if ($this->isGuardedChannel($request->channel_name) && |
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! $this->retrieveUser($request, $channelName)) { |
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throw new AccessDeniedHttpException; |
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} |
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return parent::verifyUserCanAccessChannel( |
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$request, $channelName |
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); |
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} |
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/** |
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* Return the valid authentication response. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @param mixed $result |
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* @return mixed |
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*/ |
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public function validAuthenticationResponse($request, $result) |
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{ |
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if (Str::startsWith($request->channel_name, 'private')) { |
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$signature = $this->generateAblySignature($request->channel_name, $request->socket_id); |
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return ['auth' => $this->getPublicToken() . ':' . $signature]; |
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} |
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$channelName = $this->normalizeChannelName($request->channel_name); |
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$userId = $this->retrieveUser($request, $channelName)->getAuthIdentifier(); |
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$userData = [ |
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'user_id' => $userId, |
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]; |
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if ($result) { |
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$userData['user_info'] = $result; |
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} |
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$signature = $this->generateAblySignature($request->channel_name, $request->socket_id, $userData); |
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return [ |
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'auth' => $this->getPublicToken() . ':' . $signature, |
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'channel_data' => json_encode($userData), |
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]; |
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} |
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/** |
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* Generate the Signature for Ably auth headers |
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* @param $channelName |
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* @param $socketId |
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* @param null $userData |
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* @return string |
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*/ |
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public function generateAblySignature($channelName, $socketId, $userData = null) |
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{ |
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$privateToken = $this->getPrivateToken(); |
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$signature = $socketId .':' . $channelName; |
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if ($userData) { |
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$signature .= ':' . json_encode($userData); |
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} |
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return hash_hmac('sha256',$signature, $privateToken); |
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} |
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/** |
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* Broadcast the given event. |
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* |
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* @param array $channels |
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* @param string $event |
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* @param array $payload |
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* @return void |
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*/ |
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public function broadcast(array $channels, $event, array $payload = []) |
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{; |
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foreach (self::formatChannels($channels) as $channel) { |
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$ablyChannel = $this->ably->channels->get($channel); |
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$ablyChannel->publish($event, $payload); |
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} |
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} |
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/** |
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* Get the Public Token Value out of the Ably key |
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* @return mixed |
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*/ |
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public function getPublicToken() |
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{ |
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return Str::before($this->ably->options->key, ':'); |
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} |
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/** |
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* Get the Private Token value out of the Ably Key |
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* @return mixed |
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*/ |
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public function getPrivateToken() |
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{ |
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return Str::after($this->ably->options->key, ':'); |
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} |
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/** |
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* Get the Ably SDK instance. |
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* |
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* @return \Ably\AblyRest |
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*/ |
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public function getAbly() |
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{ |
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return $this->ably; |
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} |
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} |
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springboardVR /
Laravel-Ably-Broadcaster
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