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<?php |
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/** |
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* @package WebSockets |
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* @category modules |
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* @author Nazar Mokrynskyi <[email protected]> |
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* @copyright Copyright (c) 2015, Nazar Mokrynskyi |
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* @license MIT License, see license.txt |
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*/ |
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namespace cs\modules\WebSockets; |
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use |
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Ratchet\Client\Factory as Client_factory, |
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Ratchet\Client\WebSocket as Client_websocket, |
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Ratchet\ConnectionInterface, |
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Ratchet\Http\HttpServer, |
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Ratchet\MessageComponentInterface, |
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Ratchet\Server\IoServer, |
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Ratchet\WebSocket\WsServer, |
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React\Dns\Resolver\Factory as Dns_factory, |
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React\EventLoop\Factory as Loop_factory, |
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cs\Config, |
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cs\Event, |
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cs\Session, |
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cs\Singleton, |
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cs\User, |
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Exception, |
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SplObjectStorage; |
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/** |
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* @method static Server instance($check = false) |
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*/ |
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class Server implements MessageComponentInterface { |
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use |
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Singleton; |
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/** |
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* Message will be delivered to everyone |
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*/ |
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const SEND_TO_ALL = 1; |
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/** |
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* Message will be delivered to registered users only |
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*/ |
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const SEND_TO_REGISTERED_USERS = 2; |
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/** |
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* Message will be delivered to users, specified in target (might be array of users) |
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*/ |
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const SEND_TO_SPECIFIC_USERS = 3; |
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/** |
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* Message will be delivered to users from group, specified in target (might be array of groups) |
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*/ |
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const SEND_TO_USERS_GROUP = 4; |
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/** |
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* Message will be delivered to users whose connection objects have property with certain value, target should be an array with format [property, value] |
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*/ |
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const SEND_TO_FILTER = 5; |
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/** |
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* Each object additionally will have properties `user_id`, `session_id`, `session_expire` and `user_groups` with user id and ids of user groups |
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* correspondingly |
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* |
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* @var ConnectionInterface[]|SplObjectStorage |
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*/ |
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protected $clients; |
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/** |
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* @var ConnectionInterface[]|SplObjectStorage |
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*/ |
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protected $servers; |
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/** |
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* Connection to master server |
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* |
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* @var ConnectionInterface |
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*/ |
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protected $connection_to_master; |
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/** |
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* @var Pool |
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*/ |
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protected $pool; |
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/** |
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* Address to WebSockets server in format wss://server/WebSockets or ws://server/WebSockets, so that one WebSockets server can reach another (in case of |
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* several servers) |
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* |
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* @var string |
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*/ |
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protected $address; |
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/** |
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* @var IoServer |
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*/ |
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protected $io_server; |
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/** |
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* @var \React\EventLoop\LoopInterface |
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*/ |
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protected $loop; |
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/** |
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* @var Client_factory |
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*/ |
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protected $client_connector; |
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/** |
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* @var int |
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*/ |
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protected $listen_port; |
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/** |
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* @var string |
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*/ |
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protected $listen_locally; |
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/** |
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* @var string |
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*/ |
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protected $dns_server; |
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/** |
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* @var string |
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*/ |
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protected $security_key; |
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/** |
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* @var bool |
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*/ |
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protected $remember_session_ip; |
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protected function construct () { |
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$Config = Config::instance(); |
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$module_data = $Config->module('WebSockets'); |
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$this->listen_port = $module_data->listen_port; |
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$this->listen_locally = $module_data->listen_locally ? '127.0.0.1' : '0.0.0.0'; |
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$this->dns_server = $module_data->dns_server ?: '127.0.0.1'; |
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$this->dns_server = $module_data->security_key; |
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$this->remember_session_ip = $Config->core['remember_user_ip']; |
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$this->pool = Pool::instance(); |
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$this->clients = new SplObjectStorage; |
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$this->servers = new SplObjectStorage; |
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/** |
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* @var \cs\_SERVER $_SERVER |
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*/ |
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$this->address = ($_SERVER->secure ? 'wss' : 'ws')."://$_SERVER->host/WebSockets"; |
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} |
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/** |
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* Run WebSockets server |
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* |
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* @param null|string $address |
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*/ |
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function run ($address = null) { |
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$this->address = $address ?: $this->address; |
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@ini_set('error_log', LOGS.'/WebSockets-server.log'); |
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$ws_server = new WsServer($this); |
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// No encoding check - better performance, browsers do this anyway |
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$ws_server->setEncodingChecks(false); |
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// Disable all versions except RFC6455, which is supported by all modern browsers |
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$ws_server->disableVersion(0); |
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$ws_server->disableVersion(6); |
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$this->io_server = IoServer::factory( |
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new HttpServer( |
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new Connection_properties_injector($ws_server) |
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), |
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$this->listen_port, |
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$this->listen_locally |
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); |
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$this->loop = $this->io_server->loop; |
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$this->client_connector = new Client_factory( |
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$this->loop, |
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(new Dns_factory)->create( |
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$this->dns_server, |
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$this->loop |
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) |
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); |
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$this->connect_to_master(); |
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// Since we may work with a lot of different users - disable this cache in order to not run out of memory |
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User::instance()->disable_memory_cache(); |
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$this->loop->run(); |
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} |
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/** |
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* @param ConnectionInterface $connection |
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*/ |
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function onOpen (ConnectionInterface $connection) { |
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$this->clients->attach($connection); |
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} |
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/** |
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* @param ConnectionInterface $connection |
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* @param string $message |
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*/ |
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function onMessage (ConnectionInterface $connection, $message) { |
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$from_master = $connection === $this->connection_to_master; |
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if (!$this->parse_message($message, $action, $details, $send_to, $target)) { |
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if (!$from_master) { |
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$connection->close(); |
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} |
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return; |
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} |
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switch ($action) { |
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/** |
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* Connection to master server as server (by default all connections considered as clients) |
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*/ |
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case "Server/connect:$this->security_key": |
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/** |
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* Under certain circumstances it may happen so that one server become available through multiple addresses, |
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* in this case we need to remove one of them from list of pools |
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*/ |
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if ($details['from_slave'] === $this->address) { |
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$this->pool->del($details['to_master']); |
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$connection->close(); |
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} else { |
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$this->clients->detach($connection); |
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$this->servers->attach($connection); |
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} |
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return; |
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/** |
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* Internal connection from application |
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*/ |
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case "Application/Internal:$this->security_key": |
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/** @noinspection PhpUndefinedFieldInspection */ |
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if ($this->parse_message($details, $action_, $details_, $send_to_, $target_)) { |
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$connection->close(); |
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$this->send_to_clients($action_, $details_, $send_to_, $target_); |
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} |
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return; |
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case 'Client/authentication': |
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$Session = Session::instance(); |
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/** @noinspection PhpUndefinedFieldInspection */ |
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$session = $Session->get($connection->session_id); |
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/** @noinspection PhpUndefinedFieldInspection */ |
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if ( |
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!$session || |
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!$Session->is_session_owner($session['id'], $connection->user_agent, $connection->remote_addr, $connection->ip) |
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) { |
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$connection->send( |
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_json_encode(['Client/authentication:error', $this->compose_error(403)]) |
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); |
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$connection->close(); |
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return; |
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} |
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$connection->user_id = $session['user']; |
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$connection->session_id = $session['id']; |
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$connection->session_expire = $session['expire']; |
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$connection->groups = User::instance()->get_groups($session['user']); |
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$connection->send( |
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_json_encode(['Client/authentication', 'ok']) |
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); |
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} |
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if ($from_master) { |
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$this->send_to_clients_internal($action, $details, $send_to, $target); |
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} elseif ($this->servers->contains($connection)) { |
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$this->broadcast_message_to_servers($message, $connection); |
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if (!$send_to) { |
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return; |
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} |
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$this->send_to_clients_internal($action, $details, $send_to, $target); |
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} elseif (isset($connection->user_id)) { |
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/** @noinspection PhpUndefinedFieldInspection */ |
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Event::instance()->fire( |
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"WebSockets/message", |
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[ |
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'action' => $action, |
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'details' => $details, |
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'language' => $connection->language, |
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'user' => $connection->user_id, |
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'session' => $connection->session_id, |
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'connection' => $connection |
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] |
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); |
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} |
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} |
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/** |
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* @param string $message |
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* @param string $action |
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* @param mixed $details |
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* @param int|int[] $send_to |
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* @param int $target |
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* |
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* @return bool |
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*/ |
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protected function parse_message ($message, &$action, &$details, &$send_to, &$target) { |
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$decoded_message = _json_decode($message); |
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if ( |
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!is_array($decoded_message) || |
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!array_key_exists(0, $decoded_message) || |
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!array_key_exists(1, $decoded_message) |
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) { |
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return false; |
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} |
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list($action, $details) = $decoded_message; |
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$send_to = isset($decoded_message[2]) ? $decoded_message[2] : 0; |
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$target = isset($decoded_message[3]) ? $decoded_message[3] : false; |
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return true; |
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} |
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/** |
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* @param string $message |
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* @param ConnectionInterface|null $skip_server |
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*/ |
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protected function broadcast_message_to_servers ($message, $skip_server = null) { |
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foreach ($this->servers as $server) { |
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if ($server === $skip_server) { |
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continue; |
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} |
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$server->send($message); |
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} |
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} |
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/** |
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290
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* Compose error |
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* |
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* @param int $error_code HTTP status code |
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* @param null|string $error_message String representation of status code |
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* |
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* @return array Array to be passed as details to `::send_to_clients()` |
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*/ |
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function compose_error ($error_code, $error_message = null) { |
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$error_message = $error_message ?: status_code_string($error_code); |
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return [$error_code, $error_message]; |
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} |
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/** |
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* Send request to client |
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303
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* |
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* @param string $action |
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* @param mixed $details |
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306
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* @param int $send_to Constants `self::SEND_TO*` should be used here |
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307
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* @param false|int|int[] $target Id or array of ids in case of response to one or several users or groups |
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*/ |
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309
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function send_to_clients ($action, $details, $send_to, $target = false) { |
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310
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$message = _json_encode([$action, $details, $send_to, $target]); |
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/** |
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312
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* If server running in current process |
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313
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*/ |
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314
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if ($this->io_server) { |
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315
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if ($this->connection_to_master) { |
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$this->connection_to_master->send($message); |
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} else { |
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318
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$this->broadcast_message_to_servers($message); |
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} |
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320
|
|
|
$this->send_to_clients_internal($action, $details, $send_to, $target); |
|
321
|
|
|
return; |
|
322
|
|
|
} |
|
323
|
|
|
$servers = $this->pool->get_all(); |
|
324
|
|
|
if ($servers) { |
|
325
|
|
|
shuffle($servers); |
|
326
|
|
|
$loop = Loop_factory::create(); |
|
327
|
|
|
$connector = new Client_factory($loop); |
|
328
|
|
|
$connector($servers[0])->then( |
|
329
|
|
|
function (Client_websocket $connection) use ($message) { |
|
330
|
|
|
$connection->send( |
|
331
|
|
|
_json_encode(["Application/Internal:$this->security_key", $message]) |
|
332
|
|
|
); |
|
333
|
|
|
// Connection will be closed by server itself, no need to stop loop here |
|
334
|
|
|
}, |
|
335
|
|
|
function () use ($loop) { |
|
336
|
|
|
$loop->stop(); |
|
337
|
|
|
} |
|
338
|
|
|
); |
|
339
|
|
|
$loop->run(); |
|
340
|
|
|
} |
|
341
|
|
|
} |
|
342
|
|
|
/** |
|
343
|
|
|
* Send request to client |
|
344
|
|
|
* |
|
345
|
|
|
* @param string $action |
|
346
|
|
|
* @param mixed $details |
|
347
|
|
|
* @param int $send_to Constants `self::SEND_TO_*` should be used here |
|
348
|
|
|
* @param false|int|int[]|mixed[] $target Id or array of ids in case of response to one or several users or groups, [property, value] for filter |
|
349
|
|
|
*/ |
|
350
|
|
|
protected function send_to_clients_internal ($action, $details, $send_to, $target = false) { |
|
351
|
|
|
$message = _json_encode([$action, $details]); |
|
352
|
|
|
/** |
|
353
|
|
|
* Special system actions |
|
354
|
|
|
*/ |
|
355
|
|
|
switch ($action) { |
|
356
|
|
|
case 'Server/close_by_session': |
|
357
|
|
|
foreach ($this->clients as $client) { |
|
358
|
|
|
if ($client->session_id == $details) { |
|
359
|
|
|
$client->send(_json_encode('Server/close')); |
|
360
|
|
|
$client->close(); |
|
361
|
|
|
} |
|
362
|
|
|
} |
|
363
|
|
|
return; |
|
364
|
|
|
case 'Server/close_by_user': |
|
365
|
|
|
foreach ($this->clients as $client) { |
|
366
|
|
|
if ($client->user_id == $details) { |
|
367
|
|
|
$client->send(_json_encode('Server/close')); |
|
368
|
|
|
$client->close(); |
|
369
|
|
|
} |
|
370
|
|
|
} |
|
371
|
|
|
return; |
|
372
|
|
|
} |
|
373
|
|
|
switch ($send_to) { |
|
374
|
|
|
case self::SEND_TO_ALL: |
|
375
|
|
|
foreach ($this->clients as $client) { |
|
376
|
|
|
$client->send($message); |
|
377
|
|
|
} |
|
378
|
|
|
break; |
|
379
|
|
|
case self::SEND_TO_REGISTERED_USERS: |
|
380
|
|
|
foreach ($this->clients as $client) { |
|
381
|
|
|
if (isset($client->user_id)) { |
|
382
|
|
|
$this->send_to_client_if_not_expire($client, $message); |
|
383
|
|
|
} |
|
384
|
|
|
} |
|
385
|
|
|
break; |
|
386
|
|
|
case self::SEND_TO_SPECIFIC_USERS: |
|
387
|
|
|
$target = (array)$target; |
|
388
|
|
|
foreach ($this->clients as $client) { |
|
389
|
|
|
if (isset($client->user_id) && in_array($client->user_id, $target)) { |
|
390
|
|
|
$this->send_to_client_if_not_expire($client, $message); |
|
391
|
|
|
} |
|
392
|
|
|
} |
|
393
|
|
|
break; |
|
394
|
|
|
case self::SEND_TO_USERS_GROUP: |
|
395
|
|
|
$target = (array)$target; |
|
396
|
|
|
foreach ($this->clients as $client) { |
|
397
|
|
|
if (isset($client->user_groups) && array_intersect($client->user_groups, $target)) { |
|
398
|
|
|
$this->send_to_client_if_not_expire($client, $message); |
|
399
|
|
|
} |
|
400
|
|
|
} |
|
401
|
|
|
break; |
|
402
|
|
|
case self::SEND_TO_FILTER: |
|
403
|
|
|
list($property, $value) = $target; |
|
404
|
|
|
foreach ($this->clients as $client) { |
|
405
|
|
|
if (isset($client->$property) && $client->$property === $value) { |
|
406
|
|
|
$this->send_to_client_if_not_expire($client, $message); |
|
407
|
|
|
} |
|
408
|
|
|
} |
|
409
|
|
|
break; |
|
410
|
|
|
} |
|
411
|
|
|
} |
|
412
|
|
|
/** |
|
413
|
|
|
* If session not expire - will send message, otherwise will disconnect |
|
414
|
|
|
* |
|
415
|
|
|
* @param ConnectionInterface $client |
|
416
|
|
|
* @param string $message |
|
417
|
|
|
*/ |
|
418
|
|
|
protected function send_to_client_if_not_expire ($client, $message) { |
|
419
|
|
|
/** @noinspection PhpUndefinedFieldInspection */ |
|
420
|
|
|
if ($client->session_expire >= time()) { |
|
421
|
|
|
$client->send($message); |
|
422
|
|
|
} else { |
|
423
|
|
|
$client->close(); |
|
424
|
|
|
} |
|
425
|
|
|
} |
|
426
|
|
|
/** |
|
427
|
|
|
* Close all client connections by specified session id |
|
428
|
|
|
* |
|
429
|
|
|
* @param string $session_id |
|
430
|
|
|
*/ |
|
431
|
|
|
function close_by_session ($session_id) { |
|
432
|
|
|
$this->send_to_clients('Server/close_by_session', $session_id, 0); |
|
433
|
|
|
} |
|
434
|
|
|
/** |
|
435
|
|
|
* Close all client connections by specified user id |
|
436
|
|
|
* |
|
437
|
|
|
* @param string $user_id |
|
438
|
|
|
*/ |
|
439
|
|
|
function close_by_user ($user_id) { |
|
440
|
|
|
$this->send_to_clients('Server/close_by_user', $user_id, 0); |
|
441
|
|
|
} |
|
442
|
|
|
/** |
|
443
|
|
|
* Connect to master server |
|
444
|
|
|
* |
|
445
|
|
|
* Two trials, if server do not respond twice - it will be removed from servers pool, and next server will become master |
|
446
|
|
|
*/ |
|
447
|
|
|
protected function connect_to_master () { |
|
448
|
|
|
static $last_trial = ''; |
|
449
|
|
|
// Add server to connections pool and connect to master if any |
|
450
|
|
|
$this->pool->add($this->address); |
|
451
|
|
|
$master = $this->pool->get_master(); |
|
452
|
|
|
if ($master && $master != $this->address) { |
|
453
|
|
|
call_user_func($this->client_connector, $master)->then( |
|
454
|
|
|
function (Client_websocket $connection) use (&$last_trial, $master) { |
|
455
|
|
|
$last_trial = ''; |
|
456
|
|
|
$this->connection_to_master = $connection; |
|
457
|
|
|
$connection->on( |
|
458
|
|
|
'message', |
|
459
|
|
|
function ($message) use ($connection) { |
|
460
|
|
|
$this->onMessage($connection, $message); |
|
461
|
|
|
} |
|
462
|
|
|
); |
|
463
|
|
|
$connection->on( |
|
464
|
|
|
'error', |
|
465
|
|
|
function () use ($connection) { |
|
466
|
|
|
$connection->close(); |
|
467
|
|
|
} |
|
468
|
|
|
); |
|
469
|
|
|
$connection->on( |
|
470
|
|
|
'close', |
|
471
|
|
|
function () { |
|
472
|
|
|
$this->connection_to_master = null; |
|
473
|
|
|
$this->loop->addTimer( |
|
474
|
|
|
1, |
|
475
|
|
|
function () { |
|
476
|
|
|
$this->connect_to_master(); |
|
477
|
|
|
} |
|
478
|
|
|
); |
|
479
|
|
|
} |
|
480
|
|
|
); |
|
481
|
|
|
/** |
|
482
|
|
|
* Tell master that we are server also, not regular client |
|
483
|
|
|
*/ |
|
484
|
|
|
$connection->send( |
|
485
|
|
|
_json_encode( |
|
486
|
|
|
[ |
|
487
|
|
|
"Server/connect:$this->security_key", |
|
488
|
|
|
[ |
|
489
|
|
|
'to_master' => $master, |
|
490
|
|
|
'from_slave' => $this->address |
|
491
|
|
|
] |
|
492
|
|
|
] |
|
493
|
|
|
) |
|
494
|
|
|
); |
|
495
|
|
|
}, |
|
496
|
|
|
function () use (&$last_trial, $master) { |
|
497
|
|
|
if ($last_trial == $master) { |
|
498
|
|
|
$this->pool->del($master); |
|
499
|
|
|
} else { |
|
500
|
|
|
$last_trial = $master; |
|
501
|
|
|
} |
|
502
|
|
|
$this->loop->addTimer( |
|
503
|
|
|
1, |
|
504
|
|
|
function () { |
|
505
|
|
|
$this->connect_to_master(); |
|
506
|
|
|
} |
|
507
|
|
|
); |
|
508
|
|
|
$this->connect_to_master(); |
|
509
|
|
|
} |
|
510
|
|
|
); |
|
511
|
|
|
} else { |
|
512
|
|
|
$last_trial = ''; |
|
513
|
|
|
/** |
|
514
|
|
|
* Sometimes other servers may loose connection with master server, so new master will be selected and we need to handle this nicely |
|
515
|
|
|
*/ |
|
516
|
|
|
$this->loop->addTimer( |
|
517
|
|
|
30, |
|
518
|
|
|
function () { |
|
519
|
|
|
$this->connect_to_master(); |
|
520
|
|
|
} |
|
521
|
|
|
); |
|
522
|
|
|
} |
|
523
|
|
|
} |
|
524
|
|
|
/** |
|
525
|
|
|
* Get event loop instance |
|
526
|
|
|
* |
|
527
|
|
|
* @return \React\EventLoop\LoopInterface |
|
528
|
|
|
*/ |
|
529
|
|
|
function get_loop () { |
|
530
|
|
|
return $this->loop; |
|
531
|
|
|
} |
|
532
|
|
|
/** |
|
533
|
|
|
* @param ConnectionInterface $connection |
|
534
|
|
|
*/ |
|
535
|
|
|
function onClose (ConnectionInterface $connection) { |
|
536
|
|
|
/** |
|
537
|
|
|
* Generate pseudo-event when client is disconnected |
|
538
|
|
|
*/ |
|
539
|
|
|
if (isset($connection->user_id) && $this->clients->contains($connection)) { |
|
540
|
|
|
/** @noinspection PhpUndefinedFieldInspection */ |
|
541
|
|
|
Event::instance()->fire( |
|
542
|
|
|
"WebSockets/message", |
|
543
|
|
|
[ |
|
544
|
|
|
'action' => 'Client/disconnection', |
|
545
|
|
|
'details' => null, |
|
546
|
|
|
'language' => $connection->language, |
|
547
|
|
|
'user' => $connection->user_id, |
|
548
|
|
|
'session' => $connection->session_id, |
|
549
|
|
|
'connection' => $connection |
|
550
|
|
|
] |
|
551
|
|
|
); |
|
552
|
|
|
} |
|
553
|
|
|
// The connection is closed, remove it, as we can no longer send it messages |
|
554
|
|
|
$this->clients->detach($connection); |
|
555
|
|
|
$this->servers->detach($connection); |
|
556
|
|
|
} |
|
557
|
|
|
/** |
|
558
|
|
|
* @param ConnectionInterface $connection |
|
559
|
|
|
* @param Exception $e |
|
560
|
|
|
*/ |
|
561
|
|
|
function onError (ConnectionInterface $connection, Exception $e) { |
|
562
|
|
|
$connection->close(); |
|
563
|
|
|
} |
|
564
|
|
|
function __destruct () { |
|
565
|
|
|
$this->pool->del($this->address); |
|
566
|
|
|
} |
|
567
|
|
|
} |
|
568
|
|
|
|
nazar-pc /
CleverStyle-Framework
This check looks for the generic type
arrayas a return type and suggests a more specific type. This type is inferred from the actual code.