Hprose\Swoole\WebSocket\Client::sendAndReceive PHP Method

    protected function sendAndReceive($request, stdClass $context)
    {
        $future = new Future();
        $id = $this->getNextId();
        $count =& $this->count;
        $futures =& $this->futures;
        $futures[$id] = $future;
        if ($context->timeout > 0) {
            $timeoutFuture = new Future();
            $timer = swoole_timer_after($context->timeout, function () use($timeoutFuture) {
                $timeoutFuture->reject(new TimeoutException('timeout'));
            });
            $future->whenComplete(function () use($timer) {
                swoole_timer_clear($timer);
            })->fill($timeoutFuture);
            $future = $timeoutFuture->catchError(function ($e) use(&$count, &$futures, $id) {
                unset($futures[$id]);
                --$count;
                throw $e;
            }, function ($e) {
                return $e instanceof TimeoutException;
            });
        }
        if (!$this->connecting && ($this->ws === null || !$this->ws->isConnected())) {
            $this->connect();
        }
        $ws = $this->ws;
        if ($count < 100) {
            ++$count;
            $this->ready->then(function () use($ws, $id, $request, &$futures) {
                $data = pack('N', $id) . $request;
                if ($ws->push($data, WEBSOCKET_OPCODE_BINARY, true) === false) {
                    if (isset($futures[$id])) {
                        $error = new Exception(socket_strerror($ws->errCode));
                        $futures[$id]->reject($error);
                    }
                }
            });
        } else {
            $this->requests[] = array($id, $request);
        }
        if ($context->oneway) {
            $future->resolve(null);
        }
        return $future;
    }