/**
* Handle a WebSocket control frame.
*
* Sending pong frames might happen at anytime between sending continuation frames.
*/
protected function handleControlFrame(Frame $frame) : \Generator
{
switch ($frame->opcode) {
case Frame::CONNECTION_CLOSE:
return false;
case Frame::PING:
(yield $this->writer->writeFrame(new Frame(Frame::PONG, $frame->data), 1000));
break;
case Frame::PONG:
if (isset($this->pings[$frame->data])) {
try {
$this->pings[$frame->data]->resolve(true);
} finally {
unset($this->pings[$frame->data]);
}
}
break;
}
return true;
}