Developer
<?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\Handler;
use InvalidArgumentException;
use Monolog\Logger;
use Monolog\Utils;
/**
* Stores logs to files that are rotated every day and a limited number of files are kept.
*
* This rotation is only intended to be used as a workaround. Using logrotate to
* handle the rotation is strongly encouraged when you can use it.
*
* @author Christophe Coevoet <stof@notk.org>
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class RotatingFileHandler extends StreamHandler
{
public const FILE_PER_DAY = 'Y-m-d';
public const FILE_PER_MONTH = 'Y-m';
public const FILE_PER_YEAR = 'Y';
/** @var string */
protected $filename;
/** @var int */
protected $maxFiles;
/** @var bool */
protected $mustRotate;
/** @var \DateTimeImmutable */
protected $nextRotation;
/** @var string */
protected $filenameFormat;
/** @var string */
protected $dateFormat;
/**
* @param string $filename
* @param int $maxFiles The maximal amount of files to keep (0 means unlimited)
* @param int|null $filePermission Optional file permissions (default (0644) are only for owner read/write)
* @param bool $useLocking Try to lock log file before doing any writes
*/
public function __construct(string $filename, int $maxFiles = 0, $level = Logger::DEBUG, bool $bubble = true, ?int $filePermission = null, bool $useLocking = false)
{
$this->filename = Utils::canonicalizePath($filename);
$this->maxFiles = $maxFiles;
$this->nextRotation = new \DateTimeImmutable('tomorrow');
$this->filenameFormat = '{filename}-{date}';
$this->dateFormat = static::FILE_PER_DAY;
parent::__construct($this->getTimedFilename(), $level, $bubble, $filePermission, $useLocking);
}
/**
* {@inheritDoc}
*/
public function close(): void
{
parent::close();
if (true === $this->mustRotate) {
$this->rotate();
}
}
/**
* {@inheritDoc}
*/
public function reset()
{
parent::reset();
if (true === $this->mustRotate) {
$this->rotate();
}
}
public function setFilenameFormat(string $filenameFormat, string $dateFormat): self
{
if (!preg_match('{^[Yy](([/_.-]?m)([/_.-]?d)?)?$}', $dateFormat)) {
throw new InvalidArgumentException(
'Invalid date format - format must be one of '.
'RotatingFileHandler::FILE_PER_DAY ("Y-m-d"), RotatingFileHandler::FILE_PER_MONTH ("Y-m") '.
'or RotatingFileHandler::FILE_PER_YEAR ("Y"), or you can set one of the '.
'date formats using slashes, underscores and/or dots instead of dashes.'
);
}
if (substr_count($filenameFormat, '{date}') === 0) {
throw new InvalidArgumentException(
'Invalid filename format - format must contain at least `{date}`, because otherwise rotating is impossible.'
);
}
$this->filenameFormat = $filenameFormat;
$this->dateFormat = $dateFormat;
$this->url = $this->getTimedFilename();
$this->close();
return $this;
}
/**
* {@inheritDoc}
*/
protected function write(array $record): void
{
// on the first record written, if the log is new, we should rotate (once per day)
if (null === $this->mustRotate) {
$this->mustRotate = null === $this->url || !file_exists($this->url);
}
if ($this->nextRotation <= $record['datetime']) {
$this->mustRotate = true;
$this->close();
}
parent::write($record);
}
/**
* Rotates the files.
*/
protected function rotate(): void
{
// update filename
$this->url = $this->getTimedFilename();
$this->nextRotation = new \DateTimeImmutable('tomorrow');
// skip GC of old logs if files are unlimited
if (0 === $this->maxFiles) {
return;
}
$logFiles = glob($this->getGlobPattern());
if (false === $logFiles) {
// failed to glob
return;
}
if ($this->maxFiles >= count($logFiles)) {
// no files to remove
return;
}
// Sorting the files by name to remove the older ones
usort($logFiles, function ($a, $b) {
return strcmp($b, $a);
});
foreach (array_slice($logFiles, $this->maxFiles) as $file) {
if (is_writable($file)) {
// suppress errors here as unlink() might fail if two processes
// are cleaning up/rotating at the same time
set_error_handler(function (int $errno, string $errstr, string $errfile, int $errline): bool {
return false;
});
unlink($file);
restore_error_handler();
}
}
$this->mustRotate = false;
}
protected function getTimedFilename(): string
{
$fileInfo = pathinfo($this->filename);
$timedFilename = str_replace(
['{filename}', '{date}'],
[$fileInfo['filename'], date($this->dateFormat)],
$fileInfo['dirname'] . '/' . $this->filenameFormat
);
if (isset($fileInfo['extension'])) {
$timedFilename .= '.'.$fileInfo['extension'];
}
return $timedFilename;
}
protected function getGlobPattern(): string
{
$fileInfo = pathinfo($this->filename);
$glob = str_replace(
['{filename}', '{date}'],
[$fileInfo['filename'], str_replace(
['Y', 'y', 'm', 'd'],
['[0-9][0-9][0-9][0-9]', '[0-9][0-9]', '[0-9][0-9]', '[0-9][0-9]'],
$this->dateFormat)
],
$fileInfo['dirname'] . '/' . $this->filenameFormat
);
if (isset($fileInfo['extension'])) {
$glob .= '.'.$fileInfo['extension'];
}
return $glob;
}
}
Developer
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