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<?php |
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declare(strict_types=1); |
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namespace Opekunov\Centrifugo; |
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use Carbon\Carbon; |
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use GuzzleHttp\Client as HttpClient; |
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use GuzzleHttp\Exception\ClientException; |
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use Opekunov\Centrifugo\Contracts\CentrifugoInterface; |
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class Centrifugo implements CentrifugoInterface |
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{ |
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const API_PATH = '/api'; |
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/** |
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* @var \GuzzleHttp\Client |
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*/ |
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protected $httpClient; |
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/** |
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* @var array |
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*/ |
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protected $config; |
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/** |
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* Create a new Centrifugo instance. |
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* |
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* @param array $config |
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* @param \GuzzleHttp\Client $httpClient |
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*/ |
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public function __construct(array $config = null, HttpClient $httpClient = null) |
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{ |
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$this->httpClient = $httpClient ?? new HttpClient(); |
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if (!$config) { |
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$this->config = app()->make('config')->get('broadcasting.connections.centrifugo'); |
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} else { |
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$this->config = $this->initConfiguration($config ?? []) ?? |
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app()->make('config')->get('broadcasting.connections.centrifugo'); |
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} |
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} |
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/** |
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* Init centrifugo configuration. |
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* |
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* @param array $config |
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* |
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* @return array |
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*/ |
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protected function initConfiguration(array $config) |
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{ |
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$defaults = [ |
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'url' => 'http://localhost:8000', |
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'secret' => null, |
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'apikey' => null, |
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'ssl_key' => null, |
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'verify' => true, |
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'show_node_info' => false, |
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'timeout' => 10, |
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]; |
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foreach ($config as $key => $value) { |
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if (array_key_exists($key, $defaults)) { |
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$defaults[$key] = $value; |
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} |
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} |
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return $defaults; |
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} |
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/** |
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* Send message into channel. |
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* |
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* @param string $channel |
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* @param array $data |
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* |
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* @return mixed |
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*/ |
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public function publish(string $channel, array $data) |
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{ |
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return $this->send('publish', [ |
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'channel' => $channel, |
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'data' => $data, |
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]); |
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} |
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/** |
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* Send message into multiple channel. |
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* |
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* @param array $channels |
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* @param array $data |
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* |
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* @return mixed |
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*/ |
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public function broadcast(array $channels, array $data) |
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{ |
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$params = ['channels' => $channels, 'data' => $data]; |
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return $this->send('broadcast', $params); |
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} |
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/** |
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* Get channel presence information (all clients currently subscribed on this channel). |
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* |
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* @param string $channel |
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* |
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* @return mixed |
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*/ |
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public function presence(string $channel) |
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{ |
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return $this->send('presence', ['channel' => $channel]); |
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} |
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/** |
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* Get channel presence information in short form. |
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* |
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* @param string $channel |
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* |
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* @return mixed |
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*/ |
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public function presenceStats(string $channel) |
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{ |
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return $this->send('presence_stats', ['channel' => $channel]); |
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} |
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/** |
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* Get channel history information (list of last messages sent into channel). |
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* |
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* @param string $channel |
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* |
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* @return mixed |
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*/ |
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public function history(string $channel) |
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{ |
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return $this->send('history', ['channel' => $channel]); |
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} |
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/** |
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* Remove channel history information. |
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* |
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* @param string $channel |
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* |
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* @return mixed |
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*/ |
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public function historyRemove(string $channel) |
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{ |
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return $this->send('history_remove', [ |
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'channel' => $channel, |
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]); |
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} |
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/** |
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* Unsubscribe user from channel. |
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* |
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* @param string $channel |
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* @param string $user |
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* |
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* @return mixed |
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*/ |
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public function unsubscribe(string $channel, string $user) |
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{ |
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return $this->send('unsubscribe', [ |
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'channel' => $channel, |
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'user' => $user, |
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]); |
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} |
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/** |
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* Disconnect user by its ID. |
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* |
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* @param string $user_id |
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* |
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* @return mixed |
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*/ |
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public function disconnect(string $user_id) |
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{ |
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return $this->send('disconnect', ['user' => (string) $user_id]); |
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} |
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/** |
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* Get channels information (list of currently active channels). |
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* |
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* @return mixed |
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*/ |
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public function channels() |
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{ |
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return $this->send('channels'); |
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} |
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/** |
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* Get stats information about running server nodes. |
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* |
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* @return mixed |
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*/ |
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public function info() |
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{ |
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return $this->send('info'); |
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} |
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/** |
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* Generate connection token. |
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* |
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* @param string $userId |
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* @param int|Carbon $exp |
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* @param array $info |
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* |
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* @return string |
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*/ |
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public function generateConnectionToken(string $userId = '', $exp = 0, array $info = []): string |
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{ |
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if (gettype($exp) !== 'integer') { |
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$exp = $exp->unix(); |
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} |
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$header = ['typ' => 'JWT', 'alg' => 'HS256']; |
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$payload = ['sub' => $userId]; |
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if (!empty($info)) { |
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$payload['info'] = $info; |
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} |
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if ($exp) { |
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$payload['exp'] = $exp; |
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} |
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$segments = []; |
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$segments[] = $this->urlsafeB64Encode(json_encode($header)); |
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$segments[] = $this->urlsafeB64Encode(json_encode($payload)); |
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$signing_input = implode('.', $segments); |
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$signature = $this->sign($signing_input, $this->getSecret()); |
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$segments[] = $this->urlsafeB64Encode($signature); |
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return implode('.', $segments); |
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} |
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/** |
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* Generate private channel token. |
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* |
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* @param string $client |
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* @param string $channel |
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* @param int|Carbon $exp |
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* @param array $info |
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* |
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* @return string |
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*/ |
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public function generatePrivateChannelToken(string $client, string $channel, $exp = 0, array $info = []): string |
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{ |
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if (gettype($exp) !== 'integer') { |
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$exp = $exp->unix(); |
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} |
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$header = ['typ' => 'JWT', 'alg' => 'HS256']; |
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$payload = ['channel' => $channel, 'client' => $client]; |
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if (!empty($info)) { |
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$payload['info'] = $info; |
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} |
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if ($exp) { |
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$payload['exp'] = $exp; |
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} |
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$segments = []; |
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$segments[] = $this->urlsafeB64Encode(json_encode($header)); |
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$segments[] = $this->urlsafeB64Encode(json_encode($payload)); |
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$signing_input = implode('.', $segments); |
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$signature = $this->sign($signing_input, $this->getSecret()); |
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$segments[] = $this->urlsafeB64Encode($signature); |
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return implode('.', $segments); |
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} |
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/** |
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* Get secret key. |
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* |
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* @return string |
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*/ |
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protected function getSecret() |
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{ |
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return $this->config['secret']; |
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} |
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/** |
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* Send message to centrifugo server. |
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* |
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* @param string $method |
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* @param array $params |
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* |
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* @return mixed |
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*/ |
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protected function send($method, array $params = []) |
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{ |
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$json = json_encode(['method' => $method, 'params' => $params]); |
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$headers = [ |
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'Content-type' => 'application/json', |
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'Authorization' => 'apikey '.$this->config['apikey'], |
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]; |
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try { |
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$url = parse_url($this->prepareUrl()); |
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$config = collect([ |
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'headers' => $headers, |
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'body' => $json, |
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'http_errors' => true, |
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'timeout' => $this->config['timeout'], |
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]); |
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if ($url['scheme'] == 'https') { |
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$config->put('verify', collect($this->config)->get('verify', false)); |
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if (collect($this->config)->get('ssl_key')) { |
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$config->put('ssl_key', collect($this->config)->get('ssl_key')); |
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} |
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} |
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$response = $this->httpClient->post($this->prepareUrl(), $config->toArray()); |
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$result = json_decode((string) $response->getBody(), true); |
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} catch (ClientException $e) { |
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$result = [ |
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'method' => $method, |
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'error' => $e->getMessage(), |
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'body' => $params, |
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]; |
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} |
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return $result; |
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} |
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/** |
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* Prepare URL to send the http request. |
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* |
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* @return string |
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*/ |
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protected function prepareUrl() |
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{ |
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$address = rtrim($this->config['url'], '/'); |
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if (substr_compare($address, static::API_PATH, -strlen(static::API_PATH)) !== 0) { |
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$address .= static::API_PATH; |
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} |
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//$address .= '/'; |
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return $address; |
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} |
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/** |
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* Safely encode string in base64. |
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* |
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* @param string $input |
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* |
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* @return string |
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*/ |
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private function urlsafeB64Encode($input) |
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{ |
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return str_replace('=', '', strtr(base64_encode($input), '+/', '-_')); |
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} |
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/** |
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* Sign message with secret key. |
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* |
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* @param string $msg |
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* @param string $key |
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* |
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* @return string |
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*/ |
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private function sign($msg, $key) |
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{ |
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return hash_hmac('sha256', $msg, $key, true); |
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} |
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/** |
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* Can show Node info when return auth token. |
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* |
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* @return bool |
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*/ |
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public function showNodeInfo(): bool |
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{ |
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return (bool) $this->config['show_node_info']; |
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} |
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} |
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