/**
* If there is no DB connection established yet, it connects and populates self::$connection attribute.
*
* Also "wakes up" connection if it has gone away.
*/
protected function lazyConnect()
{
if (isset($this->connection)) {
// Connection might have gone away.
$this->connection->ping();
return;
}
list($host, $user, $password, $database) = $this->config->getMulti(array('db_host', 'db_user', 'db_password', 'db_name'));
$this->connection = new mysqli($host, $user, $password);
if (mysqli_connect_errno()) {
throw new PHPTracker_Persistence_Error('Unable to connect to mysql database: ' . mysqli_connect_error());
}
if (false === $this->connection->select_db($database)) {
throw new PHPTracker_Persistence_Error("Unable to select database: {$database}.\n" . $this->connection->error);
}
}
/**
* Announce a peer to be tracked and return message to the client.
*
* This methods needs 'interval' key to be set in the config of the class
* (not i the GET!). This is a number representing seconds for the client to
* wait for the next announcement.
*
* Optional config key 'load_balancing' (ON by defailt) adds 10% dispersion
* to the interval value to avoid possible announce peeks.
*
* @param PHPTracker_Config_Interface $get Config-like representation of the CGI parameters (aka. GET) sent.
* @return string
*/
public function announce(PHPTracker_Config_Interface $get)
{
try {
try {
list($info_hash, $peer_id, $port, $uploaded, $downloaded, $left) = $get->getMulti(array('info_hash', 'peer_id', 'port', 'uploaded', 'downloaded', 'left'), true);
} catch (PHPTracker_Config_Error_Missing $e) {
return $this->announceFailure("Invalid get parameters; " . $e->getMessage());
}
// IP address might be set explicitly in the GET.
$ip = $get->get('ip', false, $this->config->get('ip'));
$event = $get->get('event', false, '');
if (20 != strlen($info_hash)) {
return $this->announceFailure("Invalid length of info_hash.");
}
if (20 != strlen($peer_id)) {
return $this->announceFailure("Invalid length of info_hash.");
}
if (!(is_numeric($port) && is_int($port = $port + 0) && 0 <= $port)) {
return $this->announceFailure("Invalid port value.");
}
if (!(is_numeric($uploaded) && is_int($uploaded = $uploaded + 0) && 0 <= $uploaded)) {
return $this->announceFailure("Invalid uploaded value.");
}
if (!(is_numeric($downloaded) && is_int($downloaded = $downloaded + 0) && 0 <= $downloaded)) {
return $this->announceFailure("Invalid downloaded value.");
}
if (!(is_numeric($left) && is_int($left = $left + 0) && 0 <= $left)) {
return $this->announceFailure("Invalid left value.");
}
$interval = intval($this->config->get('interval'));
$this->persistence->saveAnnounce($info_hash, $peer_id, $ip, $port, $downloaded, $uploaded, $left, 'completed' == $event ? 'complete' : null, 'stopped' == $event ? 0 : $interval * 2);
$peers = $this->persistence->getPeers($info_hash, $peer_id, $get->get('compact', false, false), $get->get('no_peer_id', false, false));
$peer_stats = $this->persistence->getPeerStats($info_hash, $peer_id);
if (true === $this->config->get('load_balancing', false, true)) {
// Load balancing for tracker announcements.
$interval = $interval + mt_rand(round($interval / -10), round($interval / 10));
}
$announce_response = array('interval' => $interval, 'complete' => intval($peer_stats['complete']), 'incomplete' => intval($peer_stats['incomplete']), 'peers' => $peers);
return PHPTracker_Bencode_Builder::build($announce_response);
} catch (Exception $e) {
trigger_error('Failure while announcing: ' . $e->getMessage(), E_USER_WARNING);
return $this->announceFailure("Failed to announce because of internal server error.");
}
}
