ecommun / owncloud_ynh

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sources/lib/private/log/owncloud.php 4.33 KB
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  <?php
  /**
   * ownCloud
   *
   * @author Robin Appelman
   * @copyright 2012 Robin Appelman icewind1991@gmail.com
   *
   * 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_Owncloud {
  	static protected $logFile;
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  	static protected $reqId;
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  	/**
  	 * 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);
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  			// remove username/passwords from URLs before writing the to the log file
  			$time = $time->format($format);
  			if($minLevel == OC_Log::DEBUG) {
  				if(empty(self::$reqId)) {
  					self::$reqId = uniqid();
  				}
  				$reqId = self::$reqId;
  				$url = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '--';
  				$method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : '--';
  				$entry = compact('reqId', 'app', 'message', 'level', 'time', 'method', 'url');
  			}
  			else {
  				$entry = compact('app', 'message', 'level', 'time');
  			}
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  			$entry = json_encode($entry);
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  			$handle = @fopen(self::$logFile, 'a');
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  			@chmod(self::$logFile, 0640);
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  			if ($handle) {
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  				fwrite($handle, $entry."
  ");
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  				fclose($handle);
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  			} else {
  				// Fall back to error_log
  				error_log($entry);
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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) {
  		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 && $entriesCount < $limit) {
  				fseek($handle, $pos);
  				$ch = fgetc($handle);
  				if ($ch == "
  " || $pos == 0) {
  					if ($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;
  	}
  }