Viewing file:  GelfMessageFormatter.php (4.85 KB) -rw-r--r--
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<?php declare(strict_types=1);
/*
* This file is part of the Monolog package.
*
* (c) Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Monolog\Formatter;
use Monolog\Level;
use Gelf\Message;
use Monolog\Utils;
use Monolog\LogRecord;
/**
* Serializes a log message to GELF
* @see http://docs.graylog.org/en/latest/pages/gelf.html
*
* @author Matt Lehner <mlehner@gmail.com>
*/
class GelfMessageFormatter extends NormalizerFormatter
{
protected const DEFAULT_MAX_LENGTH = 32766;
/**
* @var string the name of the system for the Gelf log message
*/
protected string $systemName;
/**
* @var string a prefix for 'extra' fields from the Monolog record (optional)
*/
protected string $extraPrefix;
/**
* @var string a prefix for 'context' fields from the Monolog record (optional)
*/
protected string $contextPrefix;
/**
* @var int max length per field
*/
protected int $maxLength;
/**
* Translates Monolog log levels to Graylog2 log priorities.
*/
private function getGraylog2Priority(Level $level): int
{
return match ($level) {
Level::Debug => 7,
Level::Info => 6,
Level::Notice => 5,
Level::Warning => 4,
Level::Error => 3,
Level::Critical => 2,
Level::Alert => 1,
Level::Emergency => 0,
};
}
/**
* @throws \RuntimeException
*/
public function __construct(?string $systemName = null, ?string $extraPrefix = null, string $contextPrefix = 'ctxt_', ?int $maxLength = null)
{
if (!class_exists(Message::class)) {
throw new \RuntimeException('Composer package graylog2/gelf-php is required to use Monolog\'s GelfMessageFormatter');
}
parent::__construct('U.u');
$this->systemName = (null === $systemName || $systemName === '') ? (string) gethostname() : $systemName;
$this->extraPrefix = null === $extraPrefix ? '' : $extraPrefix;
$this->contextPrefix = $contextPrefix;
$this->maxLength = null === $maxLength ? self::DEFAULT_MAX_LENGTH : $maxLength;
}
/**
* @inheritDoc
*/
public function format(LogRecord $record): Message
{
$context = $extra = [];
if (isset($record->context)) {
/** @var array<array<mixed>|bool|float|int|string|null> $context */
$context = parent::normalize($record->context);
}
if (isset($record->extra)) {
/** @var array<array<mixed>|bool|float|int|string|null> $extra */
$extra = parent::normalize($record->extra);
}
$message = new Message();
$message
->setTimestamp($record->datetime)
->setShortMessage($record->message)
->setHost($this->systemName)
->setLevel($this->getGraylog2Priority($record->level));
// message length + system name length + 200 for padding / metadata
$len = 200 + \strlen($record->message) + \strlen($this->systemName);
if ($len > $this->maxLength) {
$message->setShortMessage(Utils::substr($record->message, 0, $this->maxLength));
}
if (isset($record->channel)) {
$message->setAdditional('facility', $record->channel);
}
foreach ($extra as $key => $val) {
$key = (string) preg_replace('#[^\w.-]#', '-', (string) $key);
$val = \is_scalar($val) || null === $val ? $val : $this->toJson($val);
$len = \strlen($this->extraPrefix . $key . $val);
if ($len > $this->maxLength) {
$message->setAdditional($this->extraPrefix . $key, Utils::substr((string) $val, 0, $this->maxLength));
continue;
}
$message->setAdditional($this->extraPrefix . $key, $val);
}
foreach ($context as $key => $val) {
$key = (string) preg_replace('#[^\w.-]#', '-', (string) $key);
$val = \is_scalar($val) || null === $val ? $val : $this->toJson($val);
$len = \strlen($this->contextPrefix . $key . $val);
if ($len > $this->maxLength) {
$message->setAdditional($this->contextPrefix . $key, Utils::substr((string) $val, 0, $this->maxLength));
continue;
}
$message->setAdditional($this->contextPrefix . $key, $val);
}
if (!$message->hasAdditional('file') && isset($context['exception']['file'])) {
if (1 === preg_match("/^(.+):([0-9]+)$/", $context['exception']['file'], $matches)) {
$message->setAdditional('file', $matches[1]);
$message->setAdditional('line', $matches[2]);
}
}
return $message;
}
}
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