wcfsetup/install/files/lib/util/ExceptionLogUtil.class.php

   1 <?php
   2 namespace wcf\util;
   3 use wcf\system\Regex;
   4
   5 /**
   6  * Contains header-related functions.
   7  *
   8  * @author      Tim Duesterhus
   9  * @copyright   2001-2019 WoltLab GmbH
  10  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  11  * @package     WoltLabSuite\Core\Util
  12  * @since       5.2
  13  */
  14 final class ExceptionLogUtil {
  15         /**
  16          * Splits the given string of Exceptions into an array.
  17          *
  18          * @param       string          $contents
  19          * @return      string[]
  20          */
  21         public static function splitLog($contents) {
  22                 // unify newlines
  23                 $contents = StringUtil::unifyNewlines($contents);
  24
  25                 // split contents
  26                 $split = new Regex('(?:^|\n<<<<\n\n)(?:<<<<<<<<([a-f0-9]{40})<<<<\n|$)');
  27                 $contents = $split->split($contents, Regex::SPLIT_NON_EMPTY_ONLY | Regex::CAPTURE_SPLIT_DELIMITER);
  28
  29                 // even items become keys, odd items become values
  30                 return array_merge(...array_map(
  31                         function($v) {
  32                                 return [$v[0] => $v[1]];
  33                         },
  34                         array_chunk($contents, 2)
  35                 ));
  36         }
  37
  38         /**
  39          * Parses the given log entry.
  40          *
  41          * @param       string          $entry
  42          * @return      mixed[]
  43          */
  44         public static function parseException($entry) {
  45                 static $regex = null;
  46                 static $chainRegex = null;
  47                 if ($regex === null || $chainRegex === null) {
  48                         $regex = new Regex("(?P<date>[MTWFS][a-z]{2}, \d{1,2} [JFMASOND][a-z]{2} \d{4} \d{2}:\d{2}:\d{2} [+-]\d{4})\s*\n".
  49                         "Message: (?P<message>.*?)\s*\n".
  50                         "PHP version: (?P<phpVersion>.*?)\s*\n".
  51                         "WoltLab Suite version: (?P<wcfVersion>.*?)\s*\n".
  52                         "Request URI: (?P<requestURI>.*?)\s*\n".
  53                         "Referrer: (?P<referrer>.*?)\s*\n".
  54                         "User Agent: (?P<userAgent>.*?)\s*\n".
  55                         "Peak Memory Usage: (?<peakMemory>\d+)/(?<maxMemory>(?:\d+|-1))\s*\n".
  56                         "(?<chain>======\n".
  57                         ".*)", Regex::DOT_ALL);
  58                         $chainRegex = new Regex("======\n".
  59                         "Error Class: (?P<class>.*?)\s*\n".
  60                         "Error Message: (?P<message>.*?)\s*\n".
  61                         "Error Code: (?P<code>[a-zA-Z0-9]+)\s*\n".
  62                         "File: (?P<file>.*?) \((?P<line>\d+)\)\s*\n".
  63                         "Extra Information: (?P<information>(?:-|[a-zA-Z0-9+/]+={0,2}))\s*\n".
  64                         "Stack Trace: (?P<stack>\[[^\n]+\])", Regex::DOT_ALL);
  65                 }
  66
  67                 if (!$regex->match($entry)) {
  68                         throw new \InvalidArgumentException('The given entry is malformed');
  69                 }
  70                 $matches = $regex->getMatches();
  71                 $chainRegex->match($matches['chain'], true, Regex::ORDER_MATCH_BY_SET);
  72
  73                 $chainMatches = array_map(function ($item) {
  74                         if ($item['information'] === '-') {
  75                                 $item['information'] = null;
  76                         }
  77                         else {
  78                                 $item['information'] = unserialize(base64_decode($item['information']), ['allowed_classes' => false]);
  79                         }
  80
  81                         $item['stack'] = JSON::decode($item['stack']);
  82
  83                         return $item;
  84                 }, $chainRegex->getMatches());
  85
  86                 $matches['date'] = strtotime($matches['date']);
  87                 $matches['chain'] = $chainMatches;
  88
  89                 return $matches;
  90         }
  91
  92         /**
  93          * Forbid creation of ExceptionLogUtil objects.
  94          */
  95         private function __construct() {
  96                 // does nothing
  97         }
  98 }