nextcloud/lib/log.php

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<?php
/**
* ownCloud
*
* @author Robin Appelman
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* @copyright 2012 Robin Appelman icewind1991@gmail.com
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
*logging utilities
*
* Log is saved at data/owncloud.log (on default)
*/
class OC_Log{
const DEBUG=0;
const INFO=1;
const WARN=2;
const ERROR=3;
const FATAL=4;
/**
* write a message in the log
* @param string $app
* @param string $message
* @param int level
*/
public static function write($app,$message,$level){
$minLevel=OC_Config::getValue( "loglevel", 2 );
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if($level>=$minLevel){
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$datadir=OC_Config::getValue( "datadirectory", OC::$SERVERROOT.'/data' );
$logFile=OC_Config::getValue( "logfile", $datadir.'/owncloud.log' );
$entry=array('app'=>$app,'message'=>$message,'level'=>$level,'time'=>time());
$fh=fopen($logFile,'a');
fwrite($fh,json_encode($entry)."\n");
fclose($fh);
}
}
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/**
* get entries from the log in reverse chronological order
* @param int limit
* @param int offset
* @return array
*/
public static function getEntries($limit=50,$offset=0){
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$datadir=OC_Config::getValue( "datadirectory", OC::$SERVERROOT.'/data' );
$logFile=OC_Config::getValue( "logfile", $datadir.'/owncloud.log' );
$entries=array();
if(!file_exists($logFile)){
return array();
}
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$contents=file($logFile);
if(!$contents){//error while reading log
return array();
}
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$end=max(count($contents)-$offset-1,0);
$start=max($end-$limit,0);
for($i=$end;$i>$start;$i--){
$entries[]=json_decode($contents[$i]);
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}
return $entries;
}
}