protected function connectToAddress(string $address, float $timeout, bool $encrypt)
{
$url = \sprintf('%s://%s', $this->protocol, $address);
$errno = null;
$errstr = null;
$context = \stream_context_create(\array_replace_recursive($this->options, ['socket' => ['connect' => $address]]));
$socket = @\stream_socket_client($url, $errno, $errstr, $timeout ?: null, \STREAM_CLIENT_CONNECT | \STREAM_CLIENT_ASYNC_CONNECT, $context);
if (!\is_resource($socket)) {
throw new SocketException(\sprintf('Could not connect to "%s" (%s): [%s] %s', $url, $this->peer, $errno, \trim($errstr)));
}
try {
\stream_set_blocking($socket, false);
\stream_set_read_buffer($socket, 0);
\stream_set_write_buffer($socket, 0);
if ($this->tcpNoDelay) {
Socket::setTcpNoDelay($socket, true);
}
if ($encrypt) {
yield from $this->encryptSocketClient($socket, $timeout);
} else {
(yield new AwaitWrite($socket, $timeout));
}
return $socket;
} catch (\Throwable $e) {
Socket::shutdown($socket);
throw $e;
}
}
/**
* Set TCP nodelay setting (nagle algorithm) of the underlying socket resource.
*
* @param bool $nodelay
* @return bool
*/
public function setTcpNoDelay(bool $nodelay) : bool
{
if (\is_resource($this->socket)) {
return Socket::setTcpNoDelay($this->socket, $nodelay);
}
return false;
}
protected function listenLoop(callable $callback, float $timeout) : \Generator
{
while (true) {
try {
(yield $this->waiting = new AwaitRead($this->socket));
} finally {
$this->waiting = null;
}
$socket = @\stream_socket_accept($this->socket, 0);
if (false !== $socket) {
\stream_set_blocking($socket, false);
\stream_set_read_buffer($socket, 0);
\stream_set_write_buffer($socket, 0);
if ($this->tcpNoDelay) {
Socket::setTcpNoDelay($socket, true);
}
// Offload handling the client to another coroutine keeping the listen loop running.
new Coroutine($this->handleClient($callback, $socket, $timeout), true);
}
}
}
