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1 | <?php |
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2 | |||
3 | namespace BeyondCode\LaravelWebSockets\WebSockets\Channels; |
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4 | |||
5 | use stdClass; |
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6 | use Ratchet\ConnectionInterface; |
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7 | use BeyondCode\LaravelWebSockets\Dashboard\DashboardLogger; |
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8 | use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\InvalidSignature; |
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9 | |||
10 | class Channel |
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11 | { |
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12 | /** @var string */ |
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13 | protected $channelName; |
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14 | |||
15 | /** @var \Ratchet\ConnectionInterface[] */ |
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16 | protected $subscribedConnections = []; |
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17 | |||
18 | public function __construct(string $channelName) |
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19 | { |
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20 | $this->channelName = $channelName; |
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21 | } |
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22 | |||
23 | public function hasConnections(): bool |
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24 | { |
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25 | return count($this->subscribedConnections) > 0; |
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26 | } |
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27 | |||
28 | public function getSubscribedConnections(): array |
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29 | { |
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30 | return $this->subscribedConnections; |
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31 | } |
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32 | |||
33 | protected function verifySignature(ConnectionInterface $connection, stdClass $payload) |
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34 | { |
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35 | $signature = "{$connection->socketId}:{$this->channelName}"; |
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36 | |||
37 | if (isset($payload->channel_data)) { |
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38 | $signature .= ":{$payload->channel_data}"; |
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39 | } |
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40 | |||
41 | if (str_after($payload->auth, ':') !== hash_hmac('sha256', $signature, $connection->app->secret)) { |
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42 | throw new InvalidSignature(); |
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43 | } |
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44 | } |
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45 | |||
46 | /* |
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47 | * @link https://pusher.com/docs/pusher_protocol#presence-channel-events |
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48 | */ |
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49 | public function subscribe(ConnectionInterface $connection, stdClass $payload) |
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50 | { |
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51 | $this->saveConnection($connection); |
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52 | |||
53 | $connection->send(json_encode([ |
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54 | 'event' => 'pusher_internal:subscription_succeeded', |
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55 | 'channel' => $this->channelName, |
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56 | ])); |
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57 | } |
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58 | |||
59 | public function unsubscribe(ConnectionInterface $connection) |
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60 | { |
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61 | unset($this->subscribedConnections[$connection->socketId]); |
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62 | |||
63 | if (! $this->hasConnections()) { |
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64 | DashboardLogger::vacated($connection, $this->channelName); |
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65 | } |
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66 | } |
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67 | |||
68 | protected function saveConnection(ConnectionInterface $connection) |
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69 | { |
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70 | $hadConnectionsPreviously = $this->hasConnections(); |
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71 | |||
72 | $this->subscribedConnections[$connection->socketId] = $connection; |
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73 | |||
74 | if (! $hadConnectionsPreviously) { |
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75 | DashboardLogger::occupied($connection, $this->channelName); |
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76 | } |
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77 | |||
78 | DashboardLogger::subscribed($connection, $this->channelName); |
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79 | } |
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80 | |||
81 | public function broadcast($payload) |
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82 | { |
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83 | foreach ($this->subscribedConnections as $connection) { |
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84 | $connection->send(json_encode($payload)); |
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85 | } |
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86 | } |
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87 | |||
88 | public function broadcastToOthers(ConnectionInterface $connection, $payload) |
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89 | { |
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90 | $this->broadcastToEveryoneExcept($payload, $connection->socketId); |
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91 | } |
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92 | |||
93 | public function broadcastToEveryoneExcept($payload, ?string $socketId = null) |
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94 | { |
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95 | if (is_null($socketId)) { |
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96 | return $this->broadcast($payload); |
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97 | } |
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98 | |||
99 | foreach ($this->subscribedConnections as $connection) { |
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100 | if ($connection->socketId !== $socketId) { |
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101 | $connection->send(json_encode($payload)); |
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102 | } |
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103 | } |
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104 | } |
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105 | |||
106 | public function toArray(): array |
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107 | { |
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108 | return [ |
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109 | 'occupied' => count($this->subscribedConnections) > 0, |
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110 | 'subscription_count' => count($this->subscribedConnections), |
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111 | ]; |
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112 | } |
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113 | } |
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114 |
If you access a property on an interface, you most likely code against a concrete implementation of the interface.
Available Fixes
Adding an additional type check:
Changing the type hint: