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|
<?php
namespace React\Socket;
use Evenement\EventEmitter;
use React\EventLoop\Loop;
use React\EventLoop\LoopInterface;
use InvalidArgumentException;
use RuntimeException;
/**
* The `UnixServer` class implements the `ServerInterface` and
* is responsible for accepting plaintext connections on unix domain sockets.
*
* ```php
* $server = new React\Socket\UnixServer('unix:///tmp/app.sock');
* ```
*
* See also the `ServerInterface` for more details.
*
* @see ServerInterface
* @see ConnectionInterface
*/
final class UnixServer extends EventEmitter implements ServerInterface
{
private $master;
private $loop;
private $listening = false;
/**
* Creates a plaintext socket server and starts listening on the given unix socket
*
* This starts accepting new incoming connections on the given address.
* See also the `connection event` documented in the `ServerInterface`
* for more details.
*
* ```php
* $server = new React\Socket\UnixServer('unix:///tmp/app.sock');
* ```
*
* This class takes an optional `LoopInterface|null $loop` parameter that can be used to
* pass the event loop instance to use for this object. You can use a `null` value
* here in order to use the [default loop](https://github.com/reactphp/event-loop#loop).
* This value SHOULD NOT be given unless you're sure you want to explicitly use a
* given event loop instance.
*
* @param string $path
* @param ?LoopInterface $loop
* @param array $context
* @throws InvalidArgumentException if the listening address is invalid
* @throws RuntimeException if listening on this address fails (already in use etc.)
*/
public function __construct($path, LoopInterface $loop = null, array $context = array())
{
$this->loop = $loop ?: Loop::get();
if (\strpos($path, '://') === false) {
$path = 'unix://' . $path;
} elseif (\substr($path, 0, 7) !== 'unix://') {
throw new \InvalidArgumentException(
'Given URI "' . $path . '" is invalid (EINVAL)',
\defined('SOCKET_EINVAL') ? \SOCKET_EINVAL : (\defined('PCNTL_EINVAL') ? \PCNTL_EINVAL : 22)
);
}
$errno = 0;
$errstr = '';
\set_error_handler(function ($_, $error) use (&$errno, &$errstr) {
// PHP does not seem to report errno/errstr for Unix domain sockets (UDS) right now.
// This only applies to UDS server sockets, see also https://3v4l.org/NAhpr.
// Parse PHP warning message containing unknown error, HHVM reports proper info at least.
if (\preg_match('/\(([^\)]+)\)|\[(\d+)\]: (.*)/', $error, $match)) {
$errstr = isset($match[3]) ? $match['3'] : $match[1];
$errno = isset($match[2]) ? (int)$match[2] : 0;
}
});
$this->master = \stream_socket_server(
$path,
$errno,
$errstr,
\STREAM_SERVER_BIND | \STREAM_SERVER_LISTEN,
\stream_context_create(array('socket' => $context))
);
\restore_error_handler();
if (false === $this->master) {
throw new \RuntimeException(
'Failed to listen on Unix domain socket "' . $path . '": ' . $errstr . SocketServer::errconst($errno),
$errno
);
}
\stream_set_blocking($this->master, 0);
$this->resume();
}
public function getAddress()
{
if (!\is_resource($this->master)) {
return null;
}
return 'unix://' . \stream_socket_get_name($this->master, false);
}
public function pause()
{
if (!$this->listening) {
return;
}
$this->loop->removeReadStream($this->master);
$this->listening = false;
}
public function resume()
{
if ($this->listening || !is_resource($this->master)) {
return;
}
$that = $this;
$this->loop->addReadStream($this->master, function ($master) use ($that) {
try {
$newSocket = SocketServer::accept($master);
} catch (\RuntimeException $e) {
$that->emit('error', array($e));
return;
}
$that->handleConnection($newSocket);
});
$this->listening = true;
}
public function close()
{
if (!\is_resource($this->master)) {
return;
}
$this->pause();
\fclose($this->master);
$this->removeAllListeners();
}
/** @internal */
public function handleConnection($socket)
{
$connection = new Connection($socket, $this->loop);
$connection->unix = true;
$this->emit('connection', array(
$connection
));
}
}
|
