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<?php
/**
* @author Andreas Fischer <bantu@owncloud.com>
* @author Bart Visscher <bartv@thisnet.nl>
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @author Bjoern Schiessle <schiessle@owncloud.com>
* @author Felix Moeller <mail@felixmoeller.de>
* @author Frank Karlitschek <frank@owncloud.org>
* @author Georg Ehrke <georg@owncloud.com>
* @author Lukas Reschke <lukas@owncloud.com>
* @author Michael Gapczynski <gapczynskim@gmail.com>
* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author Owen Winkler <a_github@midnightcircus.com>
* @author Robin Appelman <icewind@owncloud.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Tom Needham <tom@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* 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/>
*
*/
class OC_Log_Owncloud {
static protected $logFile;
/**
* Init class data
*/
public static function init() {
$defaultLogFile = OC_Config::getValue("datadirectory", OC::$SERVERROOT.'/data').'/owncloud.log';
self::$logFile = OC_Config::getValue("logfile", $defaultLogFile);
/*
* Fall back to default log file if specified logfile does not exist
* and can not be created. Error suppression is required in order to
* not end up in the error handler which will try to log the error.
* A better solution (compared to error suppression) would be checking
* !is_writable(dirname(self::$logFile)) before touch(), but
* is_writable() on directories used to be pretty unreliable on Windows
* for at least some time.
*/
if (!file_exists(self::$logFile) && !@touch(self::$logFile)) {
self::$logFile = $defaultLogFile;
}
}
/**
* write a message in the log
* @param string $app
* @param string $message
* @param int $level
*/
public static function write($app, $message, $level) {
$minLevel=min(OC_Config::getValue( "loglevel", OC_Log::WARN ), OC_Log::ERROR);
if($level>=$minLevel) {
// default to ISO8601
$format = OC_Config::getValue('logdateformat', 'c');
$logtimezone=OC_Config::getValue( "logtimezone", 'UTC' );
try {
$timezone = new DateTimeZone($logtimezone);
} catch (Exception $e) {
$timezone = new DateTimeZone('UTC');
}
$time = new DateTime(null, $timezone);
$request = \OC::$server->getRequest();
$reqId = $request->getId();
$remoteAddr = $request->getRemoteAddress();
// remove username/passwords from URLs before writing the to the log file
$time = $time->format($format);
if($minLevel == OC_Log::DEBUG) {
$url = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '--';
$method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : '--';
$entry = compact('reqId', 'remoteAddr', 'app', 'message', 'level', 'time', 'method', 'url');
}
else {
$entry = compact('reqId', 'remoteAddr', 'app', 'message', 'level', 'time');
}
$entry = json_encode($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);
}
}
}
/**
* get entries from the log in reverse chronological order
* @param int $limit
* @param int $offset
* @return array
*/
public static function getEntries($limit=50, $offset=0) {
self::init();
$minLevel=OC_Config::getValue( "loglevel", OC_Log::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 != '') {
// 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;
}
$pos--;
}
fclose($handle);
}
return $entries;
}
/**
* @return string
*/
public static function getLogFilePath() {
return self::$logFile;
}
}
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