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<?php
/*
* 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 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
{
const FILE_PER_DAY = 'Y-m-d';
const FILE_PER_MONTH = 'Y-m';
const FILE_PER_YEAR = 'Y';
protected $filename;
protected $maxFiles;
protected $mustRotate;
protected $nextRotation;
protected $filenameFormat;
protected $dateFormat;
/**
* @param string $filename
* @param int $maxFiles The maximal amount of files to keep (0 means unlimited)
* @param int $level The minimum logging level at which this handler will be triggered
* @param bool $bubble Whether the messages that are handled can bubble up the stack or not
* @param int|null $filePermission Optional file permissions (default (0644) are only for owner read/write)
* @param bool $useLocking Try to lock log file before doing any writes
*/
public function __construct($filename, $maxFiles = 0, $level = Logger::DEBUG, $bubble = true, $filePermission = null, $useLocking = false)
{
$this->filename = Utils::canonicalizePath($filename);
$this->maxFiles = (int) $maxFiles;
$this->nextRotation = new \DateTime('tomorrow');
$this->filenameFormat = '{filename}-{date}';
$this->dateFormat = 'Y-m-d';
parent::__construct($this->getTimedFilename(), $level, $bubble, $filePermission, $useLocking);
}
/**
* {@inheritdoc}
*/
public function close()
{
parent::close();
if (true === $this->mustRotate) {
$this->rotate();
}
}
/**
* {@inheritdoc}
*/
public function reset()
{
parent::reset();
if (true === $this->mustRotate) {
$this->rotate();
}
}
public function setFilenameFormat($filenameFormat, $dateFormat)
{
if (!preg_match('{^Y(([/_.-]?m)([/_.-]?d)?)?$}', $dateFormat)) {
trigger_error(
'Invalid date format - format must be one of '.
'RotatingFileHandler::FILE_PER_DAY ("Y-m-d"), RotatingFileHandler::FILE_PER_MONTH ("Y-m") '.
'or RotatingFileHandler::FILE_PER_YEAR ("Y"), or you can set one of the '.
'date formats using slashes, underscores and/or dots instead of dashes.',
E_USER_DEPRECATED
);
}
if (substr_count($filenameFormat, '{date}') === 0) {
trigger_error(
'Invalid filename format - format should contain at least `{date}`, because otherwise rotating is impossible.',
E_USER_DEPRECATED
);
}
$this->filenameFormat = $filenameFormat;
$this->dateFormat = $dateFormat;
$this->url = $this->getTimedFilename();
$this->close();
}
/**
* {@inheritdoc}
*/
protected function write(array $record)
{
// on the first record written, if the log is new, we should rotate (once per day)
if (null === $this->mustRotate) {
$this->mustRotate = !file_exists($this->url);
}
if ($this->nextRotation < $record['datetime']) {
$this->mustRotate = true;
$this->close();
}
parent::write($record);
}
/**
* Rotates the files.
*/
protected function rotate()
{
// update filename
$this->url = $this->getTimedFilename();
$this->nextRotation = new \DateTime('tomorrow');
// skip GC of old logs if files are unlimited
if (0 === $this->maxFiles) {
return;
}
$logFiles = glob($this->getGlobPattern());
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 ($errno, $errstr, $errfile, $errline) {});
unlink($file);
restore_error_handler();
}
}
$this->mustRotate = false;
}
protected function getTimedFilename()
{
$fileInfo = pathinfo($this->filename);
$timedFilename = str_replace(
array('{filename}', '{date}'),
array($fileInfo['filename'], date($this->dateFormat)),
$fileInfo['dirname'] . '/' . $this->filenameFormat
);
if (!empty($fileInfo['extension'])) {
$timedFilename .= '.'.$fileInfo['extension'];
}
return $timedFilename;
}
protected function getGlobPattern()
{
$fileInfo = pathinfo($this->filename);
$glob = str_replace(
array('{filename}', '{date}'),
array($fileInfo['filename'], '[0-9][0-9][0-9][0-9]*'),
$fileInfo['dirname'] . '/' . $this->filenameFormat
);
if (!empty($fileInfo['extension'])) {
$glob .= '.'.$fileInfo['extension'];
}
return $glob;
}
}