diff options
Diffstat (limited to 'vendor/react/socket/src/FdServer.php')
| -rw-r--r-- | vendor/react/socket/src/FdServer.php | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/vendor/react/socket/src/FdServer.php b/vendor/react/socket/src/FdServer.php new file mode 100644 index 0000000..2c7a6c4 --- /dev/null +++ b/vendor/react/socket/src/FdServer.php @@ -0,0 +1,212 @@ +<?php + +namespace React\Socket; + +use Evenement\EventEmitter; +use React\EventLoop\Loop; +use React\EventLoop\LoopInterface; + +/** + * [Internal] The `FdServer` class implements the `ServerInterface` and + * is responsible for accepting connections from an existing file descriptor. + * + * ```php + * $socket = new React\Socket\FdServer(3); + * ``` + * + * Whenever a client connects, it will emit a `connection` event with a connection + * instance implementing `ConnectionInterface`: + * + * ```php + * $socket->on('connection', function (ConnectionInterface $connection) { + * echo 'Plaintext connection from ' . $connection->getRemoteAddress() . PHP_EOL; + * $connection->write('hello there!' . PHP_EOL); + * … + * }); + * ``` + * + * See also the `ServerInterface` for more details. + * + * @see ServerInterface + * @see ConnectionInterface + * @internal + */ +final class FdServer extends EventEmitter implements ServerInterface +{ + private $master; + private $loop; + private $unix = false; + private $listening = false; + + /** + * Creates a socket server and starts listening on the given file descriptor + * + * This starts accepting new incoming connections on the given file descriptor. + * See also the `connection event` documented in the `ServerInterface` + * for more details. + * + * ```php + * $socket = new React\Socket\FdServer(3); + * ``` + * + * If the given FD is invalid or out of range, it will throw an `InvalidArgumentException`: + * + * ```php + * // throws InvalidArgumentException + * $socket = new React\Socket\FdServer(-1); + * ``` + * + * If the given FD appears to be valid, but listening on it fails (such as + * if the FD does not exist or does not refer to a socket server), it will + * throw a `RuntimeException`: + * + * ```php + * // throws RuntimeException because FD does not reference a socket server + * $socket = new React\Socket\FdServer(0, $loop); + * ``` + * + * Note that these error conditions may vary depending on your system and/or + * configuration. + * See the exception message and code for more details about the actual error + * condition. + * + * @param int|string $fd FD number such as `3` or as URL in the form of `php://fd/3` + * @param ?LoopInterface $loop + * @throws \InvalidArgumentException if the listening address is invalid + * @throws \RuntimeException if listening on this address fails (already in use etc.) + */ + public function __construct($fd, LoopInterface $loop = null) + { + if (\preg_match('#^php://fd/(\d+)$#', $fd, $m)) { + $fd = (int) $m[1]; + } + if (!\is_int($fd) || $fd < 0 || $fd >= \PHP_INT_MAX) { + throw new \InvalidArgumentException( + 'Invalid FD number given (EINVAL)', + \defined('SOCKET_EINVAL') ? \SOCKET_EINVAL : 22 + ); + } + + $this->loop = $loop ?: Loop::get(); + + $this->master = @\fopen('php://fd/' . $fd, 'r+'); + if (false === $this->master) { + // Match errstr from PHP's warning message. + // fopen(php://fd/3): Failed to open stream: Error duping file descriptor 3; possibly it doesn't exist: [9]: Bad file descriptor + $error = \error_get_last(); + \preg_match('/\[(\d+)\]: (.*)/', $error['message'], $m); + $errno = isset($m[1]) ? (int) $m[1] : 0; + $errstr = isset($m[2]) ? $m[2] : $error['message']; + + throw new \RuntimeException( + 'Failed to listen on FD ' . $fd . ': ' . $errstr . SocketServer::errconst($errno), + $errno + ); + } + + $meta = \stream_get_meta_data($this->master); + if (!isset($meta['stream_type']) || $meta['stream_type'] !== 'tcp_socket') { + \fclose($this->master); + + $errno = \defined('SOCKET_ENOTSOCK') ? \SOCKET_ENOTSOCK : 88; + $errstr = \function_exists('socket_strerror') ? \socket_strerror($errno) : 'Not a socket'; + + throw new \RuntimeException( + 'Failed to listen on FD ' . $fd . ': ' . $errstr . ' (ENOTSOCK)', + $errno + ); + } + + // Socket should not have a peer address if this is a listening socket. + // Looks like this work-around is the closest we can get because PHP doesn't expose SO_ACCEPTCONN even with ext-sockets. + if (\stream_socket_get_name($this->master, true) !== false) { + \fclose($this->master); + + $errno = \defined('SOCKET_EISCONN') ? \SOCKET_EISCONN : 106; + $errstr = \function_exists('socket_strerror') ? \socket_strerror($errno) : 'Socket is connected'; + + throw new \RuntimeException( + 'Failed to listen on FD ' . $fd . ': ' . $errstr . ' (EISCONN)', + $errno + ); + } + + // Assume this is a Unix domain socket (UDS) when its listening address doesn't parse as a valid URL with a port. + // Looks like this work-around is the closest we can get because PHP doesn't expose SO_DOMAIN even with ext-sockets. + $this->unix = \parse_url($this->getAddress(), \PHP_URL_PORT) === false; + + \stream_set_blocking($this->master, false); + + $this->resume(); + } + + public function getAddress() + { + if (!\is_resource($this->master)) { + return null; + } + + $address = \stream_socket_get_name($this->master, false); + + if ($this->unix === true) { + return 'unix://' . $address; + } + + // check if this is an IPv6 address which includes multiple colons but no square brackets + $pos = \strrpos($address, ':'); + if ($pos !== false && \strpos($address, ':') < $pos && \substr($address, 0, 1) !== '[') { + $address = '[' . \substr($address, 0, $pos) . ']:' . \substr($address, $pos + 1); // @codeCoverageIgnore + } + + return 'tcp://' . $address; + } + + public function pause() + { + if (!$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 = $this->unix; + + $this->emit('connection', array($connection)); + } +} |