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<?php
namespace Drupal\syslog\Logger;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Logger\LogMessageParserInterface;
use Drupal\Core\Logger\RfcLoggerTrait;
use Psr\Log\LoggerInterface;
/**
* Redirects logging messages to syslog.
*/
class SysLog implements LoggerInterface {
use RfcLoggerTrait;
/**
* A configuration object containing syslog settings.
*
* @var \Drupal\Core\Config\Config
*/
protected $config;
/**
* The message's placeholders parser.
*
* @var \Drupal\Core\Logger\LogMessageParserInterface
*/
protected $parser;
/**
* Stores whether there is a system logger connection opened or not.
*
* @var bool
*/
protected $connectionOpened = FALSE;
/**
* Constructs a SysLog object.
*
* @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
* The configuration factory object.
* @param \Drupal\Core\Logger\LogMessageParserInterface $parser
* The parser to use when extracting message variables.
*/
public function __construct(ConfigFactoryInterface $config_factory, LogMessageParserInterface $parser) {
$this->config = $config_factory->get('syslog.settings');
$this->parser = $parser;
}
/**
* Opens a connection to the system logger.
*/
protected function openConnection() {
if (!$this->connectionOpened) {
$facility = $this->config->get('facility');
if ($facility === '') {
$facility = defined('LOG_LOCAL0') ? LOG_LOCAL0 : LOG_USER;
}
$this->connectionOpened = openlog($this->config->get('identity'), LOG_NDELAY, $facility);
}
}
/**
* {@inheritdoc}
*/
public function log($level, $message, array $context = []) {
global $base_url;
// Ensure we have a connection available.
$this->openConnection();
// Populate the message placeholders and then replace them in the message.
$message_placeholders = $this->parser->parseMessagePlaceholders($message, $context);
$message = empty($message_placeholders) ? $message : strtr($message, $message_placeholders);
$entry = strtr($this->config->get('format'), [
'!base_url' => $base_url,
'!timestamp' => $context['timestamp'],
'!type' => $context['channel'],
'!ip' => $context['ip'],
'!request_uri' => $context['request_uri'],
'!referer' => $context['referer'],
'!uid' => $context['uid'],
'!link' => strip_tags($context['link']),
'!message' => strip_tags($message),
]);
syslog($level, $entry);
}
}