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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * Logging Class * * @package CodeIgniter * @subpackage Libraries * @category Logging * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/general/errors.html */ class CI_Log { /** * Path to save log files * * @var string */ protected $_log_path; /** * File permissions * * @var int */ protected $_file_permissions = 0644; /** * Level of logging * * @var int */ protected $_threshold = 1; /** * Array of threshold levels to log * * @var array */ protected $_threshold_array = array(); /** * Format of timestamp for log files * * @var string */ protected $_date_fmt = 'Y-m-d H:i:s'; /** * Filename extension * * @var string */ protected $_file_ext; /** * Whether or not the logger can write to the log files * * @var bool */ protected $_enabled = TRUE; /** * Predefined logging levels * * @var array */ protected $_levels = array('ERROR' => 1, 'DEBUG' => 2, 'INFO' => 3, 'ALL' => 4); /** * mbstring.func_overload flag * * @var bool */ protected static $func_overload; // -------------------------------------------------------------------- /** * Class constructor * * @return void */ public function __construct() { $config =& get_config(); isset(self::$func_overload) OR self::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload')); $this->_log_path = ($config['log_path'] !== '') ? $config['log_path'] : APPPATH.'logs/'; $this->_file_ext = (isset($config['log_file_extension']) && $config['log_file_extension'] !== '') ? ltrim($config['log_file_extension'], '.') : 'php'; file_exists($this->_log_path) OR mkdir($this->_log_path, 0755, TRUE); if ( ! is_dir($this->_log_path) OR ! is_really_writable($this->_log_path)) { $this->_enabled = FALSE; } if (is_numeric($config['log_threshold'])) { $this->_threshold = (int) $config['log_threshold']; } elseif (is_array($config['log_threshold'])) { $this->_threshold = 0; $this->_threshold_array = array_flip($config['log_threshold']); } if ( ! empty($config['log_date_format'])) { $this->_date_fmt = $config['log_date_format']; } if ( ! empty($config['log_file_permissions']) && is_int($config['log_file_permissions'])) { $this->_file_permissions = $config['log_file_permissions']; } } // -------------------------------------------------------------------- /** * Write Log File * * Generally this function will be called using the global log_message() function * * @param string $level The error level: 'error', 'debug' or 'info' * @param string $msg The error message * @return bool */ public function write_log($level, $msg) { if ($this->_enabled === FALSE) { return FALSE; } $level = strtoupper($level); if (( ! isset($this->_levels[$level]) OR ($this->_levels[$level] > $this->_threshold)) && ! isset($this->_threshold_array[$this->_levels[$level]])) { return FALSE; } $filepath = $this->_log_path.'log-'.date('Y-m-d').'.'.$this->_file_ext; $message = ''; if ( ! file_exists($filepath)) { $newfile = TRUE; // Only add protection to php files if ($this->_file_ext === 'php') { $message .= "<?php defined('BASEPATH') OR exit('No direct script access allowed'); ?>\n\n"; } } if ( ! $fp = @fopen($filepath, 'ab')) { return FALSE; } flock($fp, LOCK_EX); // Instantiating DateTime with microseconds appended to initial date is needed for proper support of this format if (strpos($this->_date_fmt, 'u') !== FALSE) { $microtime_full = microtime(TRUE); $microtime_short = sprintf("%06d", ($microtime_full - floor($microtime_full)) * 1000000); $date = new DateTime(date('Y-m-d H:i:s.'.$microtime_short, $microtime_full)); $date = $date->format($this->_date_fmt); } else { $date = date($this->_date_fmt); } $message .= $this->_format_line($level, $date, $msg); for ($written = 0, $length = self::strlen($message); $written < $length; $written += $result) { if (($result = fwrite($fp, self::substr($message, $written))) === FALSE) { break; } } flock($fp, LOCK_UN); fclose($fp); if (isset($newfile) && $newfile === TRUE) { chmod($filepath, $this->_file_permissions); } return is_int($result); } // -------------------------------------------------------------------- /** * Format the log line. * * This is for extensibility of log formatting * If you want to change the log format, extend the CI_Log class and override this method * * @param string $level The error level * @param string $date Formatted date string * @param string $message The log message * @return string Formatted log line with a new line character '\n' at the end */ protected function _format_line($level, $date, $message) { return $level.' - '.$date.' --> '.$message."\n"; } // -------------------------------------------------------------------- /** * Byte-safe strlen() * * @param string $str * @return int */ protected static function strlen($str) { return (self::$func_overload) ? mb_strlen($str, '8bit') : strlen($str); } // -------------------------------------------------------------------- /** * Byte-safe substr() * * @param string $str * @param int $start * @param int $length * @return string */ protected static function substr($str, $start, $length = NULL) { if (self::$func_overload) { // mb_substr($str, $start, null, '8bit') returns an empty // string on PHP 5.3 isset($length) OR $length = ($start >= 0 ? self::strlen($str) - $start : -$start); return mb_substr($str, $start, $length, '8bit'); } return isset($length) ? substr($str, $start, $length) : substr($str, $start); } }