JezK

Edit File: class.logging.php

<?php

use Duplicator\Libs\Snap\SnapUtil;

defined('ABSPATH') || defined('DUPXABSPATH') || exit;
// Exit if accessed directly
if (!defined('DUPLICATOR_VERSION')) {
    exit;
}

/**
 * Helper Class for logging
 *
 * @package Duplicator\classes
 */
abstract class Dup_ErrorBehavior
{
    const LogOnly        = 0;
    const ThrowException = 1;
    const Quit           = 2;
}

class DUP_Log
{
    /**
     * The file handle used to write to the package log file
     */
    private static $logFileHandle = null;

/**
     * Get the setting which indicates if tracing is enabled
     */
    private static $traceEnabled = false;

public static $profileLogs = null;

/**
     * Init this static object
     */
    public static function Init()
    {
        self::$traceEnabled = (DUP_Settings::Get('trace_log_enabled') == 1);
    }

/**
     * Open a log file connection for writing to the package log file
     *
     * @param string $nameHas The Name of the log file to create
     *
     * @return nul
     */
    public static function Open($nameHash)
    {
        if (!isset($nameHash)) {
            throw new Exception("A name value is required to open a file log.");
        }
        self::Close();
        if ((self::$logFileHandle = @fopen(DUP_Settings::getSsdirLogsPath() . "/{$nameHash}.log", "a+")) === false) {
            self::$logFileHandle = null;
            return false;
        } else {
            /**
             * By initializing the error_handler on opening the log, I am sure that when a package is processed, the handler is active.
             */
            DUP_Handler::init_error_handler();
            return true;
        }
    }

/**
     * Close the package log file connection if is opened
     *
     * @return bool Returns TRUE on success or FALSE on failure.
     */
    public static function Close()
    {
        $result = true;

if (!is_null(self::$logFileHandle)) {
            $result              = @fclose(self::$logFileHandle);
            self::$logFileHandle = null;
        } else {
            $result = true;
        }
        return $result;
    }

/**
     *  General information send to the package log if opened
     *
     *  REPLACE TO DEBUG: Memory consumption as script runs
     *  $results = DUP_Util::byteSize(memory_get_peak_usage(true)) . "\t" . $msg;
     *
     *  @fwrite(self::$logFileHandle, "{$results} \n");
     *
     *  @param string $msg  The message to log
     *
     *  @return null
     */
    public static function Info($msg)
    {
        if (self::$traceEnabled) {
            self::Trace($msg);
        }
        if (!is_null(self::$logFileHandle)) {
            @fwrite(self::$logFileHandle, $msg . "\n");
        }
    }

/**
     *  General information send to the package log and trace log
     *
     *  @param string $msg  The message to log
     *
     *  @return null
     */
    public static function infoTrace($msg, $calling_function_override = null)
    {
        self::Info($msg);
        self::Trace($msg, $calling_function_override);
    }

public static function print_r_info($val, $name = '')
    {
        $msg  = empty($name) ? '' : 'VALUE ' . $name . ': ';
        $msg .= print_r($val, true);
        self::info($msg);
    }

/**
     * Does the trace file exists
     *
     * @return bool Returns true if an active trace file exists
     */
    public static function TraceFileExists()
    {
        $file_path = self::getTraceFilepath();
        return file_exists($file_path);
    }

/**
     * Gets the current file size of the active trace file
     *
     * @return string   Returns a human readable file size of the active trace file
     */
    public static function getTraceStatus()
    {
        $file_path   = DUP_Log::getTraceFilepath();
        $backup_path = DUP_Log::getBackupTraceFilepath();

if (file_exists($file_path)) {
            $filesize = is_file($file_path) ? @filesize($file_path) : 0;

//Its possible mulitple trace log files exist due to size
            if (is_file($backup_path)) {
                $filesize += @filesize($backup_path);
            }

$message = sprintf('%1$s', DUP_Util::byteSize($filesize));
        } else {
            $message = esc_html__('No Log', 'duplicator');
        }

return $message;
    }

// RSR TODO: Swap trace logic out for real trace later
    public static function Trace($message, $calling_function_override = null)
    {

if (self::$traceEnabled) {
            $unique_id = sprintf("%08x", abs(crc32($_SERVER['REMOTE_ADDR'] . $_SERVER['REQUEST_TIME'] . $_SERVER['REMOTE_PORT'])));

if ($calling_function_override == null) {
                $calling_function = SnapUtil::getCallingFunctionName();
            } else {
                $calling_function = $calling_function_override;
            }

if (is_object($message)) {
                $ov      = get_object_vars($message);
                $message = print_r($ov, true);
            } elseif (is_array($message)) {
                $message = print_r($message, true);
            }

$logging_message           = "{$unique_id}|{$calling_function} | {$message}";
            $ticks                     = time() + ((int) get_option('gmt_offset') * 3600);
            $formatted_time            = date('d-m-H:i:s', $ticks);
            $formatted_logging_message = "{$formatted_time}|DUP|{$logging_message} \r\n";

// Always write to error log - if they don't want the info they can turn off WordPress error logging or tracing
            self::ErrLog($logging_message);

// Everything goes to the plugin log, whether it's part of package generation or not.
            self::WriteToTrace($formatted_logging_message);
        }
    }

public static function print_r_trace($val, $name = '', $calling_function_override = null)
    {
        $msg  = empty($name) ? '' : 'VALUE ' . $name . ': ';
        $msg .= print_r($val, true);
        self::trace($msg, $calling_function_override);
    }

public static function errLog($message)
    {
        $message = 'DUP:' . $message;
        SnapUtil::errorLog($message);
    }

public static function TraceObject($msg, $o, $log_private_members = true)
    {
        if (self::$traceEnabled) {
            if (!$log_private_members) {
                $o = get_object_vars($o);
            }
            self::Trace($msg . ':' . print_r($o, true));
        }
    }

public static function GetDefaultKey()
    {
        $auth_key  = defined('AUTH_KEY') ? AUTH_KEY : 'atk';
        $auth_key .= defined('DB_HOST') ? DB_HOST : 'dbh';
        $auth_key .= defined('DB_NAME') ? DB_NAME : 'dbn';
        $auth_key .= defined('DB_USER') ? DB_USER : 'dbu';
        return hash('md5', $auth_key);
    }

/**
     * Gets the current file size of the old trace file "1"
     *
     * @return string   Returns a human readable file size of the active trace file
     */
    public static function GetBackupTraceFilepath()
    {
        $default_key         = self::getDefaultKey();
        $backup_log_filename = "dup_$default_key.log1";
        $backup_path         = DUP_Settings::getSsdirLogsPath() . "/" . $backup_log_filename;
        return $backup_path;
    }

/**
     * Gets the active trace file path
     *
     * @return string Returns the full path to the active trace file
     */
    public static function GetTraceFilepath()
    {
        $default_key  = self::getDefaultKey();
        $log_filename = "dup_$default_key.log";
        $file_path    = DUP_Settings::getSsdirLogsPath() . "/" . $log_filename;
        return $file_path;
    }

/**
     * Deletes the trace log and backup trace log files
     *
     * @return null
     */
    public static function DeleteTraceLog()
    {
        $file_path   = self::GetTraceFilepath();
        $backup_path = self::GetBackupTraceFilepath();
        self::trace("deleting $file_path");
        @unlink($file_path);
        self::trace("deleting $backup_path");
        @unlink($backup_path);
    }

/**
     *  Called when an error is detected and no further processing should occur
     *
     * @param string $msg The message to log
     * @param string $detail Additional details to help resolve the issue if possible
     * @param int $behavior
     */
    public static function error($msg, $detail = '', $behavior = Dup_ErrorBehavior::Quit)
    {

SnapUtil::errorLog($msg . ' DETAIL:' . $detail);
        $source = self::getStack(debug_backtrace());

$err_msg  = "\n==================================================================================\n";
        $err_msg .= "DUPLICATOR ERROR\n";
        $err_msg .= "Please try again! If the error persists see the Duplicator 'Help' menu.\n";
        $err_msg .= "---------------------------------------------------------------------------------\n";
        $err_msg .= "MESSAGE:\n\t{$msg}\n";
        if (strlen($detail)) {
            $err_msg .= "DETAILS:\n\t{$detail}\n";
        }
        $err_msg .= "TRACE:\n{$source}";
        $err_msg .= "==================================================================================\n\n";
        @fwrite(self::$logFileHandle, "{$err_msg}");

switch ($behavior) {
            case Dup_ErrorBehavior::ThrowException:
                DUP_LOG::trace("throwing exception");
                throw new Exception($msg);
                break;

case Dup_ErrorBehavior::Quit:
                DUP_LOG::trace("quitting");
                die("DUPLICATOR ERROR: Please see the 'Backup Log' file link below.");
                break;

default:
            // Nothing
        }
    }

/**
     * The current stack trace of a PHP call
     *
     * @param $stacktrace The current debug stack
     *
     * @return string
     */
    public static function getStack($stacktrace)
    {
        $output = "";
        $i      = 1;
        foreach ($stacktrace as $node) {
            $output .= "\t $i. " . basename($node['file']) . " : " . $node['function'] . " (" . $node['line'] . ")\n";
            $i++;
        }
        return $output;
    }

/**
     * Manages writing the active or backup log based on the size setting
     *
     * @return null
     */
    private static function WriteToTrace($formatted_logging_message)
    {
        $log_filepath = self::GetTraceFilepath();

if (@file_exists($log_filepath) && @filesize($log_filepath) > DUPLICATOR_MAX_LOG_SIZE) {
            $backup_log_filepath = self::GetBackupTraceFilepath();

if (file_exists($backup_log_filepath)) {
                if (@unlink($backup_log_filepath) === false) {
                    self::errLog("Couldn't delete backup log $backup_log_filepath");
                }
            }

if (@rename($log_filepath, $backup_log_filepath) === false) {
                self::errLog("Couldn't rename log $log_filepath to $backup_log_filepath");
            }
        }

if (@file_put_contents($log_filepath, $formatted_logging_message, FILE_APPEND) === false) {
            // Not en error worth reporting
        }
    }
}

class DUP_Handler
{
    const MODE_OFF         = 0; // don't write in log
    const MODE_LOG         = 1; // write errors in log file
    const MODE_VAR         = 2; // put php errors in $varModeLog static var
    const SHUTDOWN_TIMEOUT = 'tm';

/**
     *
     * @var bool
     */
    private static $initialized = false;

/**
     *
     * @var array
     */
    private static $shutdownReturns = array(
        'tm' => 'timeout'
    );

/**
     *
     * @var int
     */
    private static $handlerMode = self::MODE_LOG;

/**
     *
     * @var bool // print code reference and errno at end of php error line  [CODE:10|FILE:test.php|LINE:100]
     */
    private static $codeReference = true;

/**
     *
     * @var bool // print prefix in php error line [PHP ERR][WARN] MSG: .....
     */
    private static $errPrefix = true;

/**
     *
     * @var string // php errors in MODE_VAR
     */
    private static $varModeLog = '';

/**
     * This function only initializes the error handler the first time it is called
     */
    public static function init_error_handler()
    {
        if (!self::$initialized) {
            @set_error_handler(array(__CLASS__, 'error'));
            @register_shutdown_function(array(__CLASS__, 'shutdown'));
            self::$initialized = true;
        }
    }

/**
     * Error handler
     *
     * @param integer $errno   Error level
     * @param string  $errstr  Error message
     * @param string  $errfile Error file
     * @param integer $errline Error line
     *
     * @return void
     */
    public static function error($errno, $errstr, $errfile, $errline)
    {
        switch (self::$handlerMode) {
            case self::MODE_OFF:
                if ($errno == E_ERROR) {
                    $log_message = self::getMessage($errno, $errstr, $errfile, $errline);
                    DUP_Log::error($log_message);
                }
                break;
            case self::MODE_VAR:
                self::$varModeLog .= self::getMessage($errno, $errstr, $errfile, $errline) . "\n";
                break;
            case self::MODE_LOG:
            default:
                switch ($errno) {
                    case E_ERROR:
                        $log_message = self::getMessage($errno, $errstr, $errfile, $errline);
                        DUP_Log::error($log_message);
                        break;
                    case E_NOTICE:
                    case E_WARNING:
                    default:
                        $log_message = self::getMessage($errno, $errstr, $errfile, $errline);
                        DUP_Log::Info($log_message);
                        break;
                }
        }
    }

private static function getMessage($errno, $errstr, $errfile, $errline)
    {
        $result = '';

if (self::$errPrefix) {
            $result = '[PHP ERR]';
            switch ($errno) {
                case E_ERROR:
                    $result .= '[FATAL]';
                    break;
                case E_WARNING:
                    $result .= '[WARN]';
                    break;
                case E_NOTICE:
                    $result .= '[NOTICE]';
                    break;
                default:
                    $result .= '[ISSUE]';
                    break;
            }
            $result .= ' MSG:';
        }

$result .= $errstr;

if (self::$codeReference) {
            $result .= ' [CODE:' . $errno . '|FILE:' . $errfile . '|LINE:' . $errline . ']';
            $result .= "\n" . wp_debug_backtrace_summary();
        }

return $result;
    }

/**
     * if setMode is called without params set as default
     *
     * @param int $mode
     * @param bool $errPrefix // print prefix in php error line [PHP ERR][WARN] MSG: .....
     * @param bool $codeReference // print code reference and errno at end of php error line  [CODE:10|FILE:test.php|LINE:100]
     */
    public static function setMode($mode = self::MODE_LOG, $errPrefix = true, $codeReference = true)
    {
        switch ($mode) {
            case self::MODE_OFF:
            case self::MODE_VAR:
                self::$handlerMode = $mode;
                break;
            case self::MODE_LOG:
            default:
                self::$handlerMode = self::MODE_LOG;
        }

self::$varModeLog    = '';
        self::$errPrefix     = $errPrefix;
        self::$codeReference = $codeReference;
    }

/**
     *
     * @return string // return var log string in MODE_VAR
     */
    public static function getVarLog()
    {
        return self::$varModeLog;
    }

/**
     *
     * @return string // return var log string in MODE_VAR and clean var
     */
    public static function getVarLogClean()
    {
        $result           = self::$varModeLog;
        self::$varModeLog = '';
        return $result;
    }

/**
     *
     * @param string $status // timeout
     * @param string
     */
    public static function setShutdownReturn($status, $str)
    {
        self::$shutdownReturns[$status] = $str;
    }

/**
     * Shutdown handler
     *
     * @return void
     */
    public static function shutdown()
    {
        if (($error = error_get_last())) {
            if (preg_match('/^Maximum execution time (?:.+) exceeded$/i', $error['message'])) {
                echo self::$shutdownReturns[self::SHUTDOWN_TIMEOUT];
            }
            self::error($error['type'], $error['message'], $error['file'], $error['line']);
        }
    }
}

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