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liveuser |
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<?php
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namespace Ratchet\Wamp;
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use Ratchet\MessageComponentInterface;
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use Ratchet\WebSocket\WsServerInterface;
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use Ratchet\ConnectionInterface;
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/**
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* WebSocket Application Messaging Protocol
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*
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* @link http://wamp.ws/spec
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* @link https://github.com/oberstet/autobahn-js
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*
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* +--------------+----+------------------+
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* | Message Type | ID | DIRECTION |
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* |--------------+----+------------------+
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* | WELCOME | 0 | Server-to-Client |
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* | PREFIX | 1 | Bi-Directional |
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* | CALL | 2 | Client-to-Server |
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* | CALL RESULT | 3 | Server-to-Client |
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* | CALL ERROR | 4 | Server-to-Client |
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* | SUBSCRIBE | 5 | Client-to-Server |
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* | UNSUBSCRIBE | 6 | Client-to-Server |
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* | PUBLISH | 7 | Client-to-Server |
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* | EVENT | 8 | Server-to-Client |
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* +--------------+----+------------------+
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*/
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class ServerProtocol implements MessageComponentInterface, WsServerInterface {
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const MSG_WELCOME = 0;
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const MSG_PREFIX = 1;
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const MSG_CALL = 2;
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const MSG_CALL_RESULT = 3;
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const MSG_CALL_ERROR = 4;
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const MSG_SUBSCRIBE = 5;
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const MSG_UNSUBSCRIBE = 6;
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const MSG_PUBLISH = 7;
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const MSG_EVENT = 8;
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/**
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* @var WampServerInterface
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*/
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protected $_decorating;
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/**
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* @var \SplObjectStorage
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*/
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protected $connections;
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/**
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* @param WampServerInterface $serverComponent An class to propagate calls through
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*/
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public function __construct(WampServerInterface $serverComponent) {
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$this->_decorating = $serverComponent;
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$this->connections = new \SplObjectStorage;
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}
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/**
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* {@inheritdoc}
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*/
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public function getSubProtocols() {
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if ($this->_decorating instanceof WsServerInterface) {
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$subs = $this->_decorating->getSubProtocols();
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$subs[] = 'wamp';
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return $subs;
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}
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return ['wamp'];
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}
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/**
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* {@inheritdoc}
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*/
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public function onOpen(ConnectionInterface $conn) {
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$decor = new WampConnection($conn);
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$this->connections->attach($conn, $decor);
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$this->_decorating->onOpen($decor);
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}
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/**
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* {@inheritdoc}
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* @throws \Ratchet\Wamp\Exception
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* @throws \Ratchet\Wamp\JsonException
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*/
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public function onMessage(ConnectionInterface $from, $msg) {
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$from = $this->connections[$from];
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if (null === ($json = @json_decode($msg, true))) {
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throw new JsonException;
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}
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if (!is_array($json) || $json !== array_values($json)) {
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throw new Exception("Invalid WAMP message format");
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}
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if (isset($json[1]) && !(is_string($json[1]) || is_numeric($json[1]))) {
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throw new Exception('Invalid Topic, must be a string');
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}
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switch ($json[0]) {
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case static::MSG_PREFIX:
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$from->WAMP->prefixes[$json[1]] = $json[2];
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break;
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case static::MSG_CALL:
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array_shift($json);
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$callID = array_shift($json);
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$procURI = array_shift($json);
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if (count($json) == 1 && is_array($json[0])) {
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$json = $json[0];
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}
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$this->_decorating->onCall($from, $callID, $from->getUri($procURI), $json);
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break;
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case static::MSG_SUBSCRIBE:
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$this->_decorating->onSubscribe($from, $from->getUri($json[1]));
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break;
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case static::MSG_UNSUBSCRIBE:
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$this->_decorating->onUnSubscribe($from, $from->getUri($json[1]));
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break;
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case static::MSG_PUBLISH:
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$exclude = (array_key_exists(3, $json) ? $json[3] : null);
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if (!is_array($exclude)) {
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if (true === (boolean)$exclude) {
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$exclude = [$from->WAMP->sessionId];
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} else {
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$exclude = [];
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}
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}
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$eligible = (array_key_exists(4, $json) ? $json[4] : []);
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$this->_decorating->onPublish($from, $from->getUri($json[1]), $json[2], $exclude, $eligible);
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break;
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default:
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throw new Exception('Invalid WAMP message type');
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function onClose(ConnectionInterface $conn) {
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$decor = $this->connections[$conn];
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$this->connections->detach($conn);
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$this->_decorating->onClose($decor);
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}
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/**
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* {@inheritdoc}
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*/
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public function onError(ConnectionInterface $conn, \Exception $e) {
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return $this->_decorating->onError($this->connections[$conn], $e);
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}
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}
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