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|
<?php
/*
** Zabbix
** Copyright (C) 2001-2021 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
use Core\CModule,
CController as CAction;
require_once dirname(__FILE__).'/CAutoloader.php';
class ZBase {
const EXEC_MODE_DEFAULT = 'default';
const EXEC_MODE_SETUP = 'setup';
const EXEC_MODE_API = 'api';
/**
* An instance of the current APP object.
*
* @var APP
*/
protected static $instance;
/**
* The absolute path to the root directory.
*
* @var string
*/
protected $rootDir;
/**
* @var array of config data from zabbix config file
*/
protected $config = [];
/**
* @var CAutoloader
*/
protected $autoloader;
/**
* @var CComponentRegistry
*/
private $component_registry;
/**
* Application mode.
*
* @var string
*/
private $mode;
/**
* @var CModuleManager
*/
private $module_manager;
/**
* Returns the current instance of APP.
*
* @static
*
* @return APP
*/
public static function getInstance() {
if (self::$instance === null) {
self::$instance = new static;
}
return self::$instance;
}
/**
* Get component registry.
*
* @return CComponentRegistry
*/
public static function Component() {
return self::getInstance()->component_registry;
}
/**
* Get module manager.
*
* @return CModuleManager
*/
public static function ModuleManager() {
return self::getInstance()->module_manager;
}
/**
* Init modules required to run frontend.
*/
protected function init() {
$this->rootDir = $this->findRootDir();
$this->initAutoloader();
$this->component_registry = new CComponentRegistry;
// initialize API classes
$apiServiceFactory = new CApiServiceFactory();
$client = new CLocalApiClient();
$client->setServiceFactory($apiServiceFactory);
$wrapper = new CFrontendApiWrapper($client);
$wrapper->setProfiler(CProfiler::getInstance());
API::setWrapper($wrapper);
API::setApiServiceFactory($apiServiceFactory);
// system includes
require_once 'include/debug.inc.php';
require_once 'include/gettextwrapper.inc.php';
require_once 'include/defines.inc.php';
require_once 'include/func.inc.php';
require_once 'include/html.inc.php';
require_once 'include/perm.inc.php';
require_once 'include/audit.inc.php';
require_once 'include/js.inc.php';
require_once 'include/users.inc.php';
require_once 'include/validate.inc.php';
require_once 'include/locales.inc.php';
require_once 'include/db.inc.php';
require_once 'vendor/autoload.php';
// page specific includes
require_once 'include/actions.inc.php';
require_once 'include/discovery.inc.php';
require_once 'include/draw.inc.php';
require_once 'include/events.inc.php';
require_once 'include/graphs.inc.php';
require_once 'include/hostgroups.inc.php';
require_once 'include/hosts.inc.php';
require_once 'include/httptest.inc.php';
require_once 'include/images.inc.php';
require_once 'include/items.inc.php';
require_once 'include/maintenances.inc.php';
require_once 'include/maps.inc.php';
require_once 'include/media.inc.php';
require_once 'include/sounds.inc.php';
require_once 'include/triggers.inc.php';
}
/**
* Initializes the application.
*
* @param string $mode Application initialization mode.
*
* @throws Exception
*/
public function run($mode) {
$this->mode = $mode;
$this->init();
$this->setMaintenanceMode();
ini_set('display_errors', 'Off');
set_error_handler('zbx_err_handler');
switch ($mode) {
case self::EXEC_MODE_DEFAULT:
$file = basename($_SERVER['SCRIPT_NAME']);
$action_name = ($file === 'zabbix.php') ? getRequest('action', '') : $file;
if ($action_name === 'notifications.get') {
CWebUser::disableSessionExtension();
}
$this->loadConfigFile();
$this->initDB();
$this->setServerAddress();
$this->initLocales(CSettingsHelper::getGlobal(CSettingsHelper::DEFAULT_LANG));
$this->authenticateUser();
if (CWebUser::$data['lang'] !== CSettingsHelper::get(CSettingsHelper::DEFAULT_LANG)) {
$this->initLocales(CWebUser::$data['lang']);
}
$this->initMessages();
$this->setLayoutModeByUrl();
$this->initComponents();
$this->initModuleManager();
$router = $this->component_registry->get('router');
$router->addActions($this->module_manager->getActions());
$router->setAction($action_name);
$this->component_registry->get('menu.main')
->setSelectedByAction($action_name, $_REQUEST,
CViewHelper::loadSidebarMode() != ZBX_SIDEBAR_VIEW_MODE_COMPACT
);
$this->component_registry->get('menu.user')
->setSelectedByAction($action_name, $_REQUEST,
CViewHelper::loadSidebarMode() != ZBX_SIDEBAR_VIEW_MODE_COMPACT
);
CProfiler::getInstance()->start();
$this->processRequest($router);
break;
case self::EXEC_MODE_API:
$this->loadConfigFile();
$this->initDB();
$this->setServerAddress();
$this->initLocales('en_us');
break;
case self::EXEC_MODE_SETUP:
try {
// try to load config file, if it exists we need to init db and authenticate user to check permissions
$this->loadConfigFile();
$this->initDB();
$this->authenticateUser();
$this->initLocales(CWebUser::$data['lang']);
$this->initComponents();
}
catch (ConfigFileException $e) {
if ($e->getCode() == CConfigFile::CONFIG_VAULT_ERROR) {
echo (new CView('general.warning', [
'header' => _('Vault connection failed.'),
'messages' => [$e->getMessage()],
'theme' => ZBX_DEFAULT_THEME
]))->getOutput();
session_write_close();
exit;
}
else {
$session = new CCookieSession();
$sessionid = $session->extractSessionId() ?: CEncryptHelper::generateKey();
if (!$session->session_start($sessionid)) {
throw new Exception(_('Session initialization error.'));
}
CSessionHelper::set('sessionid', $sessionid);
}
}
break;
}
}
/**
* Returns the application mode.
*
* @return string
*/
public static function getMode(): string {
return self::getInstance()->mode;
}
/**
* Returns the absolute path to the root dir.
*
* @return string
*/
public static function getRootDir() {
return self::getInstance()->rootDir;
}
/**
* Returns the path to the frontend's root dir.
*
* @return string
*/
private function findRootDir() {
return realpath(dirname(__FILE__).'/../../..');
}
/**
* An array of directories to add to the autoloader include paths.
*
* @return array
*/
private function getIncludePaths() {
return [
$this->rootDir.'/include/classes/api',
$this->rootDir.'/include/classes/api/services',
$this->rootDir.'/include/classes/api/helpers',
$this->rootDir.'/include/classes/api/managers',
$this->rootDir.'/include/classes/api/clients',
$this->rootDir.'/include/classes/api/wrappers',
$this->rootDir.'/include/classes/core',
$this->rootDir.'/include/classes/data',
$this->rootDir.'/include/classes/mvc',
$this->rootDir.'/include/classes/db',
$this->rootDir.'/include/classes/debug',
$this->rootDir.'/include/classes/validators',
$this->rootDir.'/include/classes/validators/schema',
$this->rootDir.'/include/classes/validators/string',
$this->rootDir.'/include/classes/validators/object',
$this->rootDir.'/include/classes/validators/hostgroup',
$this->rootDir.'/include/classes/validators/host',
$this->rootDir.'/include/classes/validators/hostprototype',
$this->rootDir.'/include/classes/validators/event',
$this->rootDir.'/include/classes/export',
$this->rootDir.'/include/classes/export/writers',
$this->rootDir.'/include/classes/export/elements',
$this->rootDir.'/include/classes/graph',
$this->rootDir.'/include/classes/graphdraw',
$this->rootDir.'/include/classes/import',
$this->rootDir.'/include/classes/import/converters',
$this->rootDir.'/include/classes/import/importers',
$this->rootDir.'/include/classes/import/preprocessors',
$this->rootDir.'/include/classes/import/readers',
$this->rootDir.'/include/classes/import/validators',
$this->rootDir.'/include/classes/items',
$this->rootDir.'/include/classes/triggers',
$this->rootDir.'/include/classes/server',
$this->rootDir.'/include/classes/screens',
$this->rootDir.'/include/classes/services',
$this->rootDir.'/include/classes/sysmaps',
$this->rootDir.'/include/classes/helpers',
$this->rootDir.'/include/classes/helpers/trigger',
$this->rootDir.'/include/classes/macros',
$this->rootDir.'/include/classes/html',
$this->rootDir.'/include/classes/html/pageheader',
$this->rootDir.'/include/classes/html/svg',
$this->rootDir.'/include/classes/html/widget',
$this->rootDir.'/include/classes/html/interfaces',
$this->rootDir.'/include/classes/parsers',
$this->rootDir.'/include/classes/parsers/results',
$this->rootDir.'/include/classes/controllers',
$this->rootDir.'/include/classes/routing',
$this->rootDir.'/include/classes/json',
$this->rootDir.'/include/classes/user',
$this->rootDir.'/include/classes/setup',
$this->rootDir.'/include/classes/regexp',
$this->rootDir.'/include/classes/ldap',
$this->rootDir.'/include/classes/pagefilter',
$this->rootDir.'/include/classes/widgets/fields',
$this->rootDir.'/include/classes/widgets/forms',
$this->rootDir.'/include/classes/widgets',
$this->rootDir.'/include/classes/xml',
$this->rootDir.'/local/app/controllers',
$this->rootDir.'/app/controllers'
];
}
/**
* An array of available themes.
*
* @return array
*/
public static function getThemes() {
return [
'blue-theme' => _('Blue'),
'dark-theme' => _('Dark'),
'hc-light' => _('High-contrast light'),
'hc-dark' => _('High-contrast dark')
];
}
/**
* Check if maintenance mode is enabled.
*
* @throws Exception
*/
protected function setMaintenanceMode() {
require_once 'conf/maintenance.inc.php';
if (defined('ZBX_DENY_GUI_ACCESS')) {
if (!isset($ZBX_GUI_ACCESS_IP_RANGE) || !in_array(CWebUser::getIp(), $ZBX_GUI_ACCESS_IP_RANGE)) {
throw new Exception($_REQUEST['warning_msg']);
}
}
}
/**
* Load zabbix config file.
*/
protected function loadConfigFile() {
$configFile = $this->getRootDir().CConfigFile::CONFIG_FILE_PATH;
$config = new CConfigFile($configFile);
$this->config = $config->load();
}
/**
* Initialize classes autoloader.
*/
protected function initAutoloader() {
// Register base directory path for 'include' and 'require' functions.
set_include_path(get_include_path().PATH_SEPARATOR.$this->rootDir);
$autoloader = new CAutoloader;
$autoloader->addNamespace('', $this->getIncludePaths());
$autoloader->addNamespace('Core', [$this->rootDir.'/include/classes/core']);
$autoloader->register();
$this->autoloader = $autoloader;
}
/**
* Check if frontend can connect to DB.
* @throws DBException
*/
protected function initDB() {
$error = null;
if (!DBconnect($error)) {
CDataCacheHelper::clearValues(['db_username', 'db_password']);
throw new DBException($error);
}
}
/**
* Initialize translations.
*
* @param string $lang Language.
*/
public function initLocales(string $lang): void {
init_mbstrings();
$default_locales = ['C', 'POSIX', 'en', 'en_US', 'en_US.UTF-8', 'English_United States.1252'];
if (function_exists('bindtextdomain')) {
// initializing gettext translations depending on language selected by user
$locales = zbx_locale_variants($lang);
$locale_found = false;
foreach ($locales as $locale) {
// since LC_MESSAGES may be unavailable on some systems, try to set all of the locales
// and then revert some of them back
putenv('LC_ALL='.$locale);
putenv('LANG='.$locale);
putenv('LANGUAGE='.$locale);
setlocale(LC_TIME, $locale);
if (setlocale(LC_ALL, $locale)) {
$locale_found = true;
break;
}
}
if (!$locale_found && strtolower($lang) !== strtolower(ZBX_DEFAULT_LANG)) {
setlocale(LC_ALL, $default_locales);
error('Locale for language "'.$lang.'" is not found on the web server. Tried to set: '.implode(', ', $locales).'. Unable to translate Zabbix interface.');
}
bindtextdomain('frontend', 'locale');
bind_textdomain_codeset('frontend', 'UTF-8');
textdomain('frontend');
}
// reset the LC_NUMERIC locale so that PHP would always use a point instead of a comma for decimal numbers
setlocale(LC_NUMERIC, $default_locales);
// should be after locale initialization
require_once 'include/translateDefines.inc.php';
}
/**
* Set messages received in cookies.
*/
private function initMessages(): void {
if (CCookieHelper::has('system-message-ok')) {
CMessageHelper::setSuccessTitle(CCookieHelper::get('system-message-ok'));
CCookieHelper::unset('system-message-ok');
}
if (CCookieHelper::has('system-message-error')) {
CMessageHelper::setErrorTitle(CCookieHelper::get('system-message-error'));
CCookieHelper::unset('system-message-error');
}
if (CCookieHelper::has('system-message-details')) {
$details = json_decode(base64_decode(CCookieHelper::get('system-message-details')), true);
if ($details['type'] === 'success') {
foreach ($details['messages'] as $message) {
CMessageHelper::addSuccess($message);
}
}
else {
foreach ($details['messages'] as $message) {
CMessageHelper::addError($message);
}
}
CCookieHelper::unset('system-message-details');
}
}
/**
* Authenticate user.
*
* @throws Exception
*/
protected function authenticateUser(): void {
$session = new CEncryptedCookieSession();
if (!CWebUser::checkAuthentication($session->extractSessionId() ?: '')) {
CWebUser::setDefault();
}
if (!$session->session_start(CWebUser::$data['sessionid'])) {
throw new Exception(_('Session initialization error.'));
}
CSessionHelper::set('sessionid', CWebUser::$data['sessionid']);
// Set the authentication token for the API.
API::getWrapper()->auth = CWebUser::$data['sessionid'];
// Enable debug mode in the API.
API::getWrapper()->debug = CWebUser::getDebugMode();
}
/**
* Process request and generate response.
*
* @param CRouter $router CRouter class instance.
*/
private function processRequest(CRouter $router): void {
$action_name = $router->getAction();
$action_class = $router->getController();
try {
if (!class_exists($action_class, true)) {
throw new Exception(_s('Class %1$s not found for action %2$s.', $action_class, $action_name));
}
$action = new $action_class();
if (!is_subclass_of($action, CAction::class)) {
throw new Exception(_s('Action class %1$s must extend %2$s class.', $action_class, CAction::class));
}
$action->setAction($action_name);
$modules = $this->module_manager->getModules();
$action_module = $this->module_manager->getModuleByActionName($action_name);
if ($action_module) {
$modules = array_replace([$action_module->getId() => $action_module], $modules);
}
foreach (array_reverse($modules) as $module) {
if (is_subclass_of($module, CModule::class)) {
CView::registerDirectory($module->getDir().'/views');
CPartial::registerDirectory($module->getDir().'/partials');
}
}
register_shutdown_function(function() use ($action) {
$this->module_manager->publishEvent($action, 'onTerminate');
});
$this->module_manager->publishEvent($action, 'onBeforeAction');
$action->run();
if (!($action instanceof CLegacyAction)) {
$this->processResponseFinal($router, $action);
}
}
catch (Exception $e) {
echo (new CView('general.warning', [
'header' => $e->getMessage(),
'messages' => [],
'theme' => ZBX_DEFAULT_THEME
]))->getOutput();
session_write_close();
exit();
}
}
private function processResponseFinal(CRouter $router, CAction $action): void {
$response = $action->getResponse();
// Controller returned redirect to another page?
if ($response instanceof CControllerResponseRedirect) {
header('Content-Type: text/html; charset=UTF-8');
filter_messages();
$response->redirect();
}
// Controller returned fatal error?
elseif ($response instanceof CControllerResponseFatal) {
header('Content-Type: text/html; charset=UTF-8');
filter_messages();
CMessageHelper::addError('Controller: '.$router->getAction());
ksort($_REQUEST);
foreach ($_REQUEST as $key => $value) {
if ($key !== 'sid') {
CMessageHelper::addError(is_scalar($value) ? $key.': '.$value : $key.': '.gettype($value));
}
}
$response->redirect();
}
// Action has layout?
if ($router->getLayout() !== null) {
if (!($response instanceof CControllerResponseData)) {
throw new Exception(_s('Unexpected response for action %1$s.', $router->getAction()));
}
$layout_data_defaults = [
'page' => [
'title' => $response->getTitle(),
'file' => $response->getFileName()
],
'controller' => [
'action' => $router->getAction()
],
'main_block' => '',
'javascript' => [
'files' => []
],
'web_layout_mode' => ZBX_LAYOUT_NORMAL,
'config' => [
'server_check_interval' => CSettingsHelper::get(CSettingsHelper::SERVER_CHECK_INTERVAL),
'x_frame_options' => CSettingsHelper::get(CSettingsHelper::X_FRAME_OPTIONS)
]
];
if ($router->getView() !== null && $response->isViewEnabled()) {
$view = new CView($router->getView(), $response->getData());
$layout_data = array_replace($layout_data_defaults, [
'main_block' => $view->getOutput(),
'javascript' => [
'files' => $view->getJsFiles()
],
'web_layout_mode' => $view->getLayoutMode()
]);
}
else {
$layout_data = array_replace_recursive($layout_data_defaults, $response->getData());
}
echo (new CView($router->getLayout(), $layout_data))->getOutput();
}
session_write_close();
exit();
}
/**
* Set layout mode using URL parameters.
*/
private function setLayoutModeByUrl() {
if (hasRequest('kiosk')) {
CViewHelper::saveLayoutMode(getRequest('kiosk') === '1' ? ZBX_LAYOUT_KIOSKMODE : ZBX_LAYOUT_NORMAL);
// Remove $_GET arguments to prevent CUrl from generating URL with 'kiosk' arguments.
unset($_GET['kiosk']);
}
}
/**
* Initialize menu for main navigation. Register instance as component with 'menu.main' key.
*/
private function initComponents() {
$this->component_registry->register('router', new CRouter());
$this->component_registry->register('menu.main', CMenuHelper::getMainMenu());
$this->component_registry->register('menu.user', CMenuHelper::getUserMenu());
}
/**
* Initialize module manager and load all enabled and allowed modules according to user role settings.
*/
private function initModuleManager() {
$this->module_manager = new CModuleManager($this->rootDir.'/modules');
$db_modules = API::getApiService('module')->get([
'output' => ['moduleid', 'id', 'relative_path', 'config'],
'filter' => ['status' => MODULE_STATUS_ENABLED],
'sortfield' => 'relative_path'
], false);
$modules_missing = [];
foreach ($db_modules as $db_module) {
if (!CWebUser::checkAccess('modules.module.'.$db_module['moduleid'])) {
continue;
}
$manifest = $this->module_manager->addModule($db_module['relative_path'], $db_module['id'],
$db_module['config']
);
if (!$manifest) {
$modules_missing[] = $db_module['relative_path'];
}
}
if ($modules_missing) {
error(_n('Cannot load module at: %1$s.', 'Cannot load modules at: %1$s.', implode(', ', $modules_missing),
count($modules_missing)
));
}
foreach ($this->module_manager->getNamespaces() as $namespace => $paths) {
$this->autoloader->addNamespace($namespace, $paths);
}
$this->module_manager->initModules();
array_map('error', $this->module_manager->getErrors());
}
/**
* Check for High availability override to standalone mode, set server to use for system information checks.
*
* @return void
*/
private function setServerAddress(): void {
global $ZBX_SERVER, $ZBX_SERVER_PORT;
if ($ZBX_SERVER !== null && $ZBX_SERVER_PORT !== null) {
return;
}
$active_node = API::getApiService('hanode')->get([
'output' => ['address', 'port'],
'filter' => ['status' => ZBX_NODE_STATUS_ACTIVE],
'limit' => 1
], false);
if ($active_node) {
$ZBX_SERVER = $active_node[0]['address'];
$ZBX_SERVER_PORT = $active_node[0]['port'];
}
}
}
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