/usr/share/php/PhpAmqpLib/Wire/IO/StreamIO.php is in php-amqplib 2.4.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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namespace PhpAmqpLib\Wire\IO;
use PhpAmqpLib\Exception\AMQPIOException;
use PhpAmqpLib\Exception\AMQPRuntimeException;
use PhpAmqpLib\Exception\AMQPTimeoutException;
use PhpAmqpLib\Helper\MiscHelper;
use PhpAmqpLib\Wire\AMQPWriter;
class StreamIO extends AbstractIO
{
/**
* @var string
*/
protected $host;
/**
* @var int
*/
protected $port;
/**
* @var int
*/
protected $connection_timeout;
/**
* @var int
*/
protected $read_write_timeout;
/**
* @var resource
*/
protected $context;
/**
* @var bool
*/
protected $keepalive;
/**
* @var int
*/
protected $heartbeat;
/**
* @var float
*/
protected $last_read;
/**
* @var float
*/
protected $last_write;
/**
* @var resource
*/
private $sock;
/**
* @var bool
*/
private $canDispatchPcntlSignal;
public function __construct($host, $port, $connection_timeout, $read_write_timeout, $context = null, $keepalive = false, $heartbeat = 0)
{
$this->host = $host;
$this->port = $port;
$this->connection_timeout = $connection_timeout;
$this->read_write_timeout = $read_write_timeout;
$this->context = $context;
$this->keepalive = $keepalive;
$this->heartbeat = $heartbeat;
$this->canDispatchPcntlSignal = extension_loaded('pcntl') && function_exists('pcntl_signal_dispatch')
&& (defined('AMQP_WITHOUT_SIGNALS') ? !AMQP_WITHOUT_SIGNALS : true);
}
/**
* Setup the stream connection
*
* @throws \PhpAmqpLib\Exception\AMQPRuntimeException
* @throws \Exception
*/
public function connect()
{
$errstr = $errno = null;
if ($this->context) {
$remote = sprintf('ssl://%s:%s', $this->host, $this->port);
$this->sock = @stream_socket_client($remote, $errno, $errstr, $this->connection_timeout, STREAM_CLIENT_CONNECT, $this->context);
} else {
$remote = sprintf('tcp://%s:%s', $this->host, $this->port);
$this->sock = @stream_socket_client($remote, $errno, $errstr, $this->connection_timeout, STREAM_CLIENT_CONNECT);
}
if (!$this->sock) {
throw new AMQPRuntimeException("Error Connecting to server($errno): $errstr ");
}
list($sec, $uSec) = MiscHelper::splitSecondsMicroseconds($this->read_write_timeout);
if (!stream_set_timeout($this->sock, $sec, $uSec)) {
throw new AMQPIOException("Timeout could not be set");
}
stream_set_blocking($this->sock, 1);
if ($this->keepalive) {
$this->enable_keepalive();
}
}
/**
* Reconnect the socket
*/
public function reconnect()
{
$this->close();
$this->connect();
}
public function read($n)
{
$res = '';
$read = 0;
while ($read < $n && !feof($this->sock) && (false !== ($buf = fread($this->sock, $n - $read)))) {
$this->check_heartbeat();
if ($buf === '') {
if ($this->canDispatchPcntlSignal) {
pcntl_signal_dispatch();
}
continue;
}
$read += mb_strlen($buf, 'ASCII');
$res .= $buf;
$this->last_read = microtime(true);
}
if (mb_strlen($res, 'ASCII') != $n) {
throw new AMQPRuntimeException("Error reading data. Received " .
mb_strlen($res, 'ASCII') . " instead of expected $n bytes");
}
return $res;
}
public function write($data)
{
$len = mb_strlen($data, 'ASCII');
while (true) {
if (is_null($this->sock)) {
throw new AMQPRuntimeException("Broken pipe or closed connection");
}
if (false === ($written = @fwrite($this->sock, $data))) {
throw new AMQPRuntimeException("Error sending data");
}
if ($written === 0) {
throw new AMQPRuntimeException("Broken pipe or closed connection");
}
if ($this->timed_out()) {
throw new AMQPTimeoutException("Error sending data. Socket connection timed out");
}
$len = $len - $written;
if ($len > 0) {
$data = mb_substr($data, 0 - $len, 0 - $len, 'ASCII');
} else {
$this->last_write = microtime(true);
break;
}
}
}
protected function check_heartbeat()
{
// ignore unless heartbeat interval is set
if ($this->heartbeat !== 0 && $this->last_read && $this->last_write) {
$t = microtime(true);
$t_read = round($t - $this->last_read);
$t_write = round($t - $this->last_write);
// server has gone away
if (($this->heartbeat * 2) < $t_read) {
$this->reconnect();
}
// time for client to send a heartbeat
if (($this->heartbeat / 2) < $t_write) {
$this->write_heartbeat();
}
}
}
protected function write_heartbeat()
{
$pkt = new AMQPWriter();
$pkt->write_octet(8);
$pkt->write_short(0);
$pkt->write_long(0);
$pkt->write_octet(0xCE);
$val = $pkt->getvalue();
$this->write($pkt->getvalue());
}
public function close()
{
if (is_resource($this->sock)) {
fclose($this->sock);
}
$this->sock = null;
}
public function get_socket()
{
return $this->sock;
}
public function select($sec, $usec)
{
$read = array($this->sock);
$write = null;
$except = null;
return stream_select($read, $write, $except, $sec, $usec);
}
protected function timed_out()
{
// get status of socket to determine whether or not it has timed out
$info = stream_get_meta_data($this->sock);
return $info['timed_out'];
}
protected function enable_keepalive()
{
if (!function_exists('socket_import_stream')) {
throw new AMQPIOException("Can not enable keepalive: function socket_import_stream does not exist");
}
if (!defined('SOL_SOCKET') || !defined('SO_KEEPALIVE')) {
throw new AMQPIOException("Can not enable keepalive: SOL_SOCKET or SO_KEEPALIVE is not defined");
}
$socket = socket_import_stream($this->sock);
socket_set_option($socket, SOL_SOCKET, SO_KEEPALIVE, 1);
}
}
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