Subversion Repositories vnag

<?php /* <ViaThinkSoftSignature>

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</ViaThinkSoftSignature> */ ?>

<?php

/*

 * VNag - Nagios Framework for PHP

 * Developed by Daniel Marschall, ViaThinkSoft <www.viathinksoft.com>

 * Licensed under the terms of the Apache 2.0 license

 *

 * Revision 2022-09-12

 */

declare(ticks=1);

class MinecraftJavaVersionCheck extends VNag {

        protected $argSystemDir = null;

        public function __construct() {

                parent::__construct();

                $this->registerExpectedStandardArguments('Vvht');

                $this->getHelpManager()->setPluginName('check_minecraft_java_version');

                $this->getHelpManager()->setVersion('1.0');

                $this->getHelpManager()->setShortDescription('This plugin checks if a local Minecraft for Java server has the latest version installed.');

                $this->getHelpManager()->setCopyright('Copyright (C) 2011-$CURYEAR$ Daniel Marschall, ViaThinkSoft.');

                $this->getHelpManager()->setSyntax('$SCRIPTNAME$ [-d <directory>]');

                $this->getHelpManager()->setFootNotes('If you encounter bugs, please contact ViaThinkSoft at www.viathinksoft.com');

                // Individual (non-standard) arguments:

                $this->addExpectedArgument($this->argSystemDir = new VNagArgument('d', 'directory', VNagArgument::VALUE_REQUIRED, 'serverPath', 'The local directory where your Minecraft for Java server.jar is located.'));

        }

        protected function get_latest_minecraft_version() {

                $headers = array(

                        // These headers are important! Otherwise the request will be blocked by AkamaiGhost

                        "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",

                        "Accept-Language: de-DE,de;q=0.9,en-DE;q=0.8,en;q=0.7,en-US;q=0.6",

                        "Accept-Encoding: none"

                );

                // curl 'https://www.minecraft.net/en-us/download/server' \

                //      -H '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' \

                //      -H 'accept-language: de-DE,de;q=0.9,en-DE;q=0.8,en;q=0.7,en-US;q=0.6' \

                //      --compressed

                $ch = curl_init();

                curl_setopt($ch, CURLOPT_URL,"https://www.minecraft.net/en-us/download/server"); // TODO: make locale configurable?

                curl_setopt($ch, CURLOPT_POST, 0);

                curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

                curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

                $cont = curl_exec($ch);

                curl_close($ch);

                if (!$cont) throw new Exception("Cannot detect latest available Minecraft version (HTTPS request failed)");

                preg_match_all('@minecraft_server\\.(.+)\\.jar@U', $cont, $m);

                if (!isset($m[1][0])) throw new Exception("Cannot detect latest available Minecraft version (regex pattern mismatch)");

                return $m[1][0];

        }

        protected function get_installed_minecraft_version($local_path) {

                if (substr($local_path,-4) == '.jar') {

                        $files = glob($local_path);

                } else {

                        $files = glob($local_path.'/server.jar');

                }

                if (count($files) == 0) throw new Exception("No server.jar found at $local_path");

                if (count($files) > 1) throw new Exception("More than one server.jar found at $local_path");

                $server_jar = $files[0];

                $cmd = "unzip -p ".escapeshellarg($server_jar)." version.json";

                $out = array();

                $ec = -1;

                exec($cmd, $out, $ec);

                if ($ec != 0) throw new Exception("Cannot unzip version.json");

                $json = implode("\n",$out);

                return (string)json_decode($json,true)['name'];

        }

        protected function cbRun($optional_args=array()) {

                $system_dir = $this->argSystemDir->getValue(); // note: can contain wildcards

                $cur_ver = $this->get_installed_minecraft_version($system_dir);

                $new_ver = $this->get_latest_minecraft_version();

                if (version_compare($cur_ver,$new_ver) >= 0) {

                        $this->setStatus(VNag::STATUS_OK);

                        $this->setHeadline("Minecraft version $cur_ver is the latest available version for your Minecraft for Java server installation at $system_dir", true);

                } else {

                        $this->setStatus(VNag::STATUS_WARNING);

                        $this->setHeadline("Minecraft version $cur_ver is outdated. Newer version is $new_ver for installation at $system_dir", true);

                }

        }

}