nextcloud/lib/private/log/owncloud.php

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<?php
/**
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* @author Andreas Fischer <bantu@owncloud.com>
* @author Bart Visscher <bartv@thisnet.nl>
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* @author Christian Schnidrig <christian.schnidrig@switch.ch>
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* @author Georg Ehrke <georg@owncloud.com>
* @author Lukas Reschke <lukas@owncloud.com>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
*/
/**
* logging utilities
*
* Log is saved at data/owncloud.log (on default)
*/
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class OC_Log_Owncloud {
static protected $logFile;
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/**
* Init class data
*/
public static function init() {
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$systemConfig = \OC::$server->getSystemConfig();
$defaultLogFile = $systemConfig->getValue("datadirectory", OC::$SERVERROOT.'/data').'/owncloud.log';
self::$logFile = $systemConfig->getValue("logfile", $defaultLogFile);
/**
* Fall back to default log file if specified logfile does not exist
* and can not be created.
*/
if (!file_exists(self::$logFile)) {
if(!is_writable(dirname(self::$logFile))) {
self::$logFile = $defaultLogFile;
} else {
if(!touch(self::$logFile)) {
self::$logFile = $defaultLogFile;
}
}
}
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}
/**
* write a message in the log
* @param string $app
* @param string $message
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* @param int $level
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*/
public static function write($app, $message, $level) {
$config = \OC::$server->getSystemConfig();
// default to ISO8601
$format = $config->getValue('logdateformat', 'c');
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$logTimeZone = $config->getValue( "logtimezone", 'UTC' );
try {
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$timezone = new DateTimeZone($logTimeZone);
} catch (Exception $e) {
$timezone = new DateTimeZone('UTC');
}
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$time = DateTime::createFromFormat("U.u", number_format(microtime(true), 4, ".", ""));
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if ($time === false) {
$time = new DateTime(null, $timezone);
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} else {
// apply timezone if $time is created from UNIX timestamp
$time->setTimezone($timezone);
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}
$request = \OC::$server->getRequest();
$reqId = $request->getId();
$remoteAddr = $request->getRemoteAddress();
// remove username/passwords from URLs before writing the to the log file
$time = $time->format($format);
$url = ($request->getRequestUri() !== '') ? $request->getRequestUri() : '--';
$method = is_string($request->getMethod()) ? $request->getMethod() : '--';
if(\OC::$server->getConfig()->getSystemValue('installed', false)) {
$userObj = \OC::$server->getUserSession()->getUser();
} else {
$userObj = null;
}
$user = !is_null($userObj) ? $userObj->getUID() : '--';
$entry = compact(
'reqId',
'remoteAddr',
'app',
'message',
'level',
'time',
'method',
'url',
'user'
);
$entry = json_encode($entry);
$handle = @fopen(self::$logFile, 'a');
@chmod(self::$logFile, 0640);
if ($handle) {
fwrite($handle, $entry."\n");
fclose($handle);
} else {
// Fall back to error_log
error_log($entry);
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}
if (php_sapi_name() === 'cli-server') {
error_log($message, 4);
}
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}
/**
* get entries from the log in reverse chronological order
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* @param int $limit
* @param int $offset
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* @return array
*/
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public static function getEntries($limit=50, $offset=0) {
self::init();
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$minLevel = \OC::$server->getSystemConfig()->getValue("loglevel", \OCP\Util::WARN);
$entries = array();
$handle = @fopen(self::$logFile, 'rb');
if ($handle) {
fseek($handle, 0, SEEK_END);
$pos = ftell($handle);
$line = '';
$entriesCount = 0;
$lines = 0;
// Loop through each character of the file looking for new lines
while ($pos >= 0 && ($limit === null ||$entriesCount < $limit)) {
fseek($handle, $pos);
$ch = fgetc($handle);
if ($ch == "\n" || $pos == 0) {
if ($line != '') {
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// Add the first character if at the start of the file,
// because it doesn't hit the else in the loop
if ($pos == 0) {
$line = $ch.$line;
}
$entry = json_decode($line);
// Add the line as an entry if it is passed the offset and is equal or above the log level
if ($entry->level >= $minLevel) {
$lines++;
if ($lines > $offset) {
$entries[] = $entry;
$entriesCount++;
}
}
$line = '';
}
} else {
$line = $ch.$line;
}
$pos--;
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}
fclose($handle);
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}
return $entries;
}
/**
* @return string
*/
public static function getLogFilePath() {
return self::$logFile;
}
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}