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  1. <?php /* <ViaThinkSoftSignature>
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  23. g==
  24. </ViaThinkSoftSignature> */ ?>
  25. <?php
  26.  
  27. /*
  28.  * VNag - Nagios Framework for PHP
  29.  * Developed by Daniel Marschall, ViaThinkSoft <www.viathinksoft.com>
  30.  * Licensed under the terms of the Apache 2.0 license
  31.  *
  32.  * Revision 2023-05-02
  33.  */
  34.  
  35. declare(ticks=1);
  36.  
  37. class MinecraftJavaVersionCheck extends VNag {
  38.         protected $argSystemDir = null;
  39.  
  40.         public function __construct() {
  41.                 parent::__construct();
  42.  
  43.                 $this->registerExpectedStandardArguments('Vvht');
  44.  
  45.                 $this->getHelpManager()->setPluginName('check_minecraft_java_version');
  46.                 $this->getHelpManager()->setVersion('1.0');
  47.                 $this->getHelpManager()->setShortDescription('This plugin checks if a local Minecraft for Java server has the latest version installed.');
  48.                 $this->getHelpManager()->setCopyright('Copyright (C) 2011-$CURYEAR$ Daniel Marschall, ViaThinkSoft.');
  49.                 $this->getHelpManager()->setSyntax('$SCRIPTNAME$ [-d <directory>]');
  50.                 $this->getHelpManager()->setFootNotes('If you encounter bugs, please contact ViaThinkSoft at www.viathinksoft.com');
  51.  
  52.                 // Individual (non-standard) arguments:
  53.                 $this->addExpectedArgument($this->argSystemDir = new VNagArgument('d', 'directory', VNagArgument::VALUE_REQUIRED, 'serverPath', 'The local directory where your Minecraft for Java server.jar is located.'));
  54.         }
  55.  
  56.         protected function get_latest_minecraft_version() {
  57.                 $headers = array(
  58.                         // These headers are important! Otherwise the request will be blocked by AkamaiGhost
  59.                         "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.93 Safari/537.36",
  60.                         "Accept-Language: de-DE,de;q=0.9,en-DE;q=0.8,en;q=0.7,en-US;q=0.6",
  61.                         "Accept-Encoding: none"
  62.                 );
  63.  
  64.                 // TODO: Version is currently not shown anymore: https://bugs.mojang.com/browse/WEB-6497
  65.                 /*
  66.                 $ch = curl_init();
  67.                 curl_setopt($ch, CURLOPT_URL,"https://www.minecraft.net/en-us/download/server"); // TODO: make locale configurable?
  68.                 curl_setopt($ch, CURLOPT_POST, 0);
  69.                 curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  70.                 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  71.                 $cont = curl_exec($ch);
  72.                 curl_close($ch);
  73.                 if (!$cont) throw new Exception("Cannot detect latest available Minecraft version (HTTPS request failed)");
  74.                 preg_match_all('@minecraft_server\\.(.+)\\.jar@U', $cont, $m);
  75.                 if (!isset($m[1][0])) throw new Exception("Cannot detect latest available Minecraft version (regex pattern mismatch)");
  76.                 return $m[1][0];
  77.                 */
  78.  
  79.                 for ($page=1; $page<=2; $page++) {
  80.                         $url = 'https://feedback.minecraft.net/hc/en-us/sections/360001186971-Release-Changelogs';
  81.                         if ($page > 1) $url .= '?page='.$page;
  82.                         $url = 'https://webcache.googleusercontent.com/search?q=cache:'.urlencode($url); // Bypass CloudFlare...
  83.  
  84.                         $ch = curl_init();
  85.                         curl_setopt($ch, CURLOPT_URL, $url);
  86.                         curl_setopt($ch, CURLOPT_POST, 0);
  87.                         curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  88.                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  89.                         $cont = curl_exec($ch);
  90.                         curl_close($ch);
  91.                         if (!$cont) throw new Exception("Cannot detect latest available Minecraft version (HTTPS request failed)");
  92.                         preg_match_all('@>Minecraft: Java Edition \\- (.+)</@U', $cont, $m);
  93.                         if (isset($m[1][0])) return $m[1][0];
  94.                 }
  95.                 throw new Exception("Cannot detect latest available Minecraft version (regex pattern mismatch)");
  96.         }
  97.  
  98.         protected function get_installed_minecraft_version($local_path) {
  99.                 if (substr($local_path,-4) == '.jar') {
  100.                         $files = glob($local_path);
  101.                 } else {
  102.                         $files = glob($local_path.'/server.jar');
  103.                 }
  104.  
  105.                 if (count($files) == 0) throw new Exception("No server.jar found at $local_path");
  106.                 if (count($files) > 1) throw new Exception("More than one server.jar found at $local_path");
  107.                 $server_jar = $files[0];
  108.  
  109.                 $cmd = "unzip -p ".escapeshellarg($server_jar)." version.json";
  110.  
  111.                 $out = array();
  112.                 $ec = -1;
  113.                 exec($cmd, $out, $ec);
  114.                 if ($ec != 0) throw new Exception("Cannot unzip version.json");
  115.  
  116.                 $json = implode("\n",$out);
  117.  
  118.                 return (string)json_decode($json,true)['name'];
  119.         }
  120.  
  121.         protected function cbRun($optional_args=array()) {
  122.                 $system_dir = $this->argSystemDir->getValue(); // note: can contain wildcards
  123.                 $cur_ver = $this->get_installed_minecraft_version($system_dir);
  124.  
  125.                 $new_ver = $this->get_latest_minecraft_version();
  126.  
  127.                 if (version_compare($cur_ver,$new_ver) >= 0) {
  128.                         $this->setStatus(VNag::STATUS_OK);
  129.                         $this->setHeadline("Minecraft version $cur_ver is the latest available version for your Minecraft for Java server installation at $system_dir", true);
  130.                 } else {
  131.                         $this->setStatus(VNag::STATUS_WARNING);
  132.                         $this->setHeadline("Minecraft version $cur_ver is outdated. Newer version is $new_ver for installation at $system_dir", true);
  133.                 }
  134.         }
  135. }
  136.