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<?php |
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namespace denis660\Centrifuge; |
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use denis660\Centrifuge\Contracts\Centrifuge; |
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use Exception; |
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use Illuminate\Broadcasting\Broadcasters\Broadcaster; |
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use Illuminate\Broadcasting\BroadcastException; |
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use Symfony\Component\HttpKernel\Exception\HttpException; |
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class CentrifugeBroadcaster extends Broadcaster |
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{ |
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/** |
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* The Centrifugo SDK instance. |
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* |
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* @var \denis660\Centrifuge\Contracts\Centrifuge |
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*/ |
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protected $centrifugo; |
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/** |
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* Create a new broadcaster instance. |
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* |
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* @param \denis660\Centrifuge\Contracts\Centrifuge $centrifugo |
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*/ |
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public function __construct(Centrifuge $centrifugo) |
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{ |
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$this->centrifugo = $centrifugo; |
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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 $request |
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* @return mixed |
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*/ |
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public function auth($request) |
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{ |
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if ($request->user()) { |
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$client = $this->getClientFromRequest($request); |
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$channels = $this->getChannelsFromRequest($request); |
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$response = []; |
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foreach ($channels as $channel) { |
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$channelName = $this->getChannelName($channel); |
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try { |
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$is_access_granted = $this->verifyUserCanAccessChannel($request, $channelName); |
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} catch (HttpException $e) { |
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$is_access_granted = false; |
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} |
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$response[$channel] = $this->makeResponseForClient($is_access_granted, $client); |
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} |
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return response()->json($response); |
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} else { |
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throw new HttpException(401); |
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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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return $result; |
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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 $payload = []) |
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{ |
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$payload['event'] = $event; |
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$response = $this->centrifugo->broadcast($this->formatChannels($channels), $payload); |
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if (is_array($response) && ! isset($response['error'])) { |
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return; |
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} |
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throw new BroadcastException( |
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$response['error'] instanceof Exception ? $response['error']->getMessage() : $response['error'] |
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); |
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} |
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/** |
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* Get client from request. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @return string |
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*/ |
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private function getClientFromRequest($request) |
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{ |
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return $request->get('client', ''); |
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} |
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/** |
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* Get channels from request. |
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* |
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* @param \Illuminate\Http\Request $request |
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* @return array |
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*/ |
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private function getChannelsFromRequest($request) |
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{ |
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$channels = $request->get('channels', []); |
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return is_array($channels) ? $channels : [$channels]; |
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} |
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/** |
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* Get channel name without $ symbol (if present). |
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* |
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* @param string $channel |
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* @return string |
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*/ |
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private function getChannelName(string $channel) |
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{ |
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return (substr($channel, 0, 1) === '$') ? substr($channel, 1) : $channel; |
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} |
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/** |
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* Make response for client, based on access rights. |
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* |
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* @param bool $access_granted |
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* @param string $client |
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* @return array |
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*/ |
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private function makeResponseForClient(bool $access_granted, string $client) |
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{ |
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$info = []; |
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return $access_granted ? [ |
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'sign' => $this->centrifugo->generateConnectionToken($client, 0, $info), |
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'info' => $info, |
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] : [ |
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'status' => 403, |
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]; |
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} |
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} |
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denis660 /
laravel-centrifugo
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Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: