owncloud.php 5.01 KB
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<?php
/**
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 * @author Andreas Fischer <bantu@owncloud.com>
 * @author Bart Visscher <bartv@thisnet.nl>
 * @author Georg Ehrke <georg@owncloud.com>
 * @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) 2015, ownCloud, Inc.
 * @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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 *
 */
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/**
 * logging utilities
 *
 * Log is saved at data/owncloud.log (on default)
 */

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class OC_Log_Owncloud {
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	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", $defaultLogFile);
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		/*
		* Fall back to default log file if specified logfile does not exist
		* and can not be created. Error suppression is required in order to
		* not end up in the error handler which will try to log the error.
		* A better solution (compared to error suppression) would be checking
		* !is_writable(dirname(self::$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)) {
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			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) {
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		$config = \OC::$server->getSystemConfig();

		// default to ISO8601
		$format = $config->getValue('logdateformat', 'c');
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		$logTimeZone = $config->getValue( "logtimezone", 'UTC' );
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		try {
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			$timezone = new DateTimeZone($logTimeZone);
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		} catch (Exception $e) {
			$timezone = new DateTimeZone('UTC');
		}
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		$time = DateTime::createFromFormat("U.u", number_format(microtime(true), 4, ".", ""), $timezone);
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		if ($time === false) {
			$time = new DateTime(null, $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);
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		$minLevel=min($config->getValue( "loglevel", \OCP\Util::WARN ), \OCP\Util::ERROR);
		if($minLevel == \OCP\Util::DEBUG) {
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			$url = isset($_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($entry);
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		}
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		if (php_sapi_name() === 'cli-server') {
			error_log($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) {
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		self::init();
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		$minLevel = \OC::$server->getSystemConfig()->getValue("loglevel", \OCP\Util::WARN);
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		$entries = array();
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		$handle = @fopen(self::$logFile, 'rb');
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		if ($handle) {
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			fseek($handle, 0, SEEK_END);
			$pos = ftell($handle);
			$line = '';
			$entriesCount = 0;
			$lines = 0;
			// Loop through each character of the file looking for new lines
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			while ($pos >= 0 && ($limit === null ||$entriesCount < $limit)) {
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				fseek($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
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						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
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						if ($entry->level >= $minLevel) {
							$lines++;
							if ($lines > $offset) {
								$entries[] = $entry;
								$entriesCount++;
							}
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						}
						$line = '';
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					}
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				} else {
					$line = $ch.$line;
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				}
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				$pos--;
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			}
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			fclose($handle);
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		}
		return $entries;
	}
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	/**
	 * @return string
	 */
	public static function getLogFilePath() {
		return self::$logFile;
	}
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}