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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik;
use Exception;
use Piwik\Container\StaticContainer;
use Piwik\Plugins\BulkTracking\Tracker\Requests;
use Piwik\Plugins\PrivacyManager\Config as PrivacyManagerConfig;
use Piwik\Tracker\Db as TrackerDb;
use Piwik\Tracker\Db\DbException;
use Piwik\Tracker\Handler;
use Piwik\Tracker\Request;
use Piwik\Tracker\RequestSet;
use Piwik\Tracker\TrackerConfig;
use Piwik\Tracker\Visit;
use Piwik\Plugin\Manager as PluginManager;
use Piwik\Log\LoggerInterface;
/**
* Class used by the logging script piwik.php called by the javascript tag.
* Handles the visitor and their actions on the website, saves the data in the DB,
* saves information in the cookie, etc.
*
* We try to include as little files as possible (no dependency on 3rd party modules).
*/
class Tracker
{
/**
* @var Db
*/
private static $db = null;
// We use hex ID that are 16 chars in length, ie. 64 bits IDs
const LENGTH_HEX_ID_STRING = 16;
const LENGTH_BINARY_ID = 8;
public static $initTrackerMode = false;
private $countOfLoggedRequests = 0;
protected $isInstalled = null;
/**
* @var LoggerInterface
*/
private $logger;
public function __construct()
{
$this->logger = StaticContainer::get(LoggerInterface::class);
}
public function isDebugModeEnabled()
{
return array_key_exists('PIWIK_TRACKER_DEBUG', $GLOBALS) && $GLOBALS['PIWIK_TRACKER_DEBUG'] === true;
}
public function shouldRecordStatistics()
{
$record = TrackerConfig::getConfigValue('record_statistics') != 0;
if (!$record) {
$this->logger->debug('Tracking is disabled in the config.ini.php via record_statistics=0');
}
return $record && $this->isInstalled();
}
public static function loadTrackerEnvironment()
{
\Piwik\SettingsServer::setIsTrackerApiRequest();
if (empty($GLOBALS['PIWIK_TRACKER_DEBUG'])) {
$GLOBALS['PIWIK_TRACKER_DEBUG'] = self::isDebugEnabled();
}
if (!empty($GLOBALS['PIWIK_TRACKER_DEBUG']) && !\Piwik\Common::isPhpCliMode()) {
\Piwik\Common::sendHeader('Content-Type: text/plain');
}
PluginManager::getInstance()->loadTrackerPlugins();
}
private function init()
{
$this->handleFatalErrors();
if ($this->isDebugModeEnabled()) {
\Piwik\ErrorHandler::registerErrorHandler();
\Piwik\ExceptionHandler::setUp();
$this->logger->debug("Debug enabled - Input parameters: {params}", ['params' => var_export($_GET + $_POST, true)]);
}
}
public function isInstalled()
{
if (is_null($this->isInstalled)) {
$this->isInstalled = \Piwik\SettingsPiwik::isMatomoInstalled();
}
return $this->isInstalled;
}
public function main(Handler $handler, RequestSet $requestSet)
{
try {
$this->init();
if ($this->isPreFlightCorsRequest()) {
\Piwik\Common::sendHeader('Access-Control-Allow-Methods: GET, POST');
\Piwik\Common::sendHeader('Access-Control-Allow-Headers: *');
\Piwik\Common::sendHeader('Access-Control-Allow-Origin: *');
\Piwik\Common::sendResponseCode(204);
$this->logger->debug("Tracker detected preflight CORS request. Skipping...");
return null;
}
$handler->init($this, $requestSet);
$this->track($handler, $requestSet);
} catch (Exception $e) {
$this->logger->debug("Tracker encountered an exception: {ex}", [$e]);
$handler->onException($this, $requestSet, $e);
}
\Piwik\Piwik::postEvent('Tracker.end');
$response = $handler->finish($this, $requestSet);
$this->disconnectDatabase();
return $response;
}
public function track(Handler $handler, RequestSet $requestSet)
{
if (!$this->shouldRecordStatistics()) {
return;
}
$requestSet->initRequestsAndTokenAuth();
if ($requestSet->hasRequests()) {
$handler->onStartTrackRequests($this, $requestSet);
$handler->process($this, $requestSet);
$handler->onAllRequestsTracked($this, $requestSet);
}
}
/**
* @param Request $request
* @return array
*/
public function trackRequest(Request $request)
{
if ($request->isEmptyRequest()) {
$this->logger->debug('The request is empty');
} else {
$this->logger->debug('Current datetime: {date}', ['date' => date("Y-m-d H:i:s", $request->getCurrentTimestamp())]);
$visit = Visit\Factory::make();
$visit->setRequest($request);
$visit->handle();
}
// increment successfully logged request count. make sure to do this after try-catch,
// since an excluded visit is considered 'successfully logged'
++$this->countOfLoggedRequests;
}
/**
* Used to initialize core Piwik components on a piwik.php request
* Eg. when cache is missed and we will be calling some APIs to generate cache
*/
public static function initCorePiwikInTrackerMode()
{
if (\Piwik\SettingsServer::isTrackerApiRequest() && self::$initTrackerMode === false) {
self::$initTrackerMode = true;
require_once PIWIK_INCLUDE_PATH . '/core/Option.php';
\Piwik\Access::getInstance();
\Piwik\Config::getInstance();
try {
\Piwik\Db::get();
} catch (Exception $e) {
\Piwik\Db::createDatabaseObject();
}
PluginManager::getInstance()->loadCorePluginsDuringTracker();
}
}
public static function restoreTrackerPlugins()
{
if (\Piwik\SettingsServer::isTrackerApiRequest() && \Piwik\Tracker::$initTrackerMode) {
\Piwik\Plugin\Manager::getInstance()->loadTrackerPlugins();
}
}
public function getCountOfLoggedRequests()
{
return $this->countOfLoggedRequests;
}
public function setCountOfLoggedRequests($numLoggedRequests)
{
$this->countOfLoggedRequests = $numLoggedRequests;
}
public function hasLoggedRequests()
{
return 0 !== $this->countOfLoggedRequests;
}
public function isDatabaseConnected()
{
return !is_null(self::$db);
}
public static function getDatabase()
{
if (is_null(self::$db)) {
try {
self::$db = TrackerDb::connectPiwikTrackerDb();
} catch (Exception $e) {
$code = $e->getCode();
// Note: PDOException might return a string as code, but we can't use this for DbException
throw new DbException($e->getMessage(), is_int($code) ? $code : 0);
}
}
return self::$db;
}
protected function disconnectDatabase()
{
if ($this->isDatabaseConnected()) {
// note: I think we do this only for the tests
self::$db->disconnect();
self::$db = null;
}
}
// for tests
public static function disconnectCachedDbConnection()
{
// code redundancy w/ above is on purpose; above disconnectDatabase depends on method that can potentially be overridden
if (!is_null(self::$db)) {
self::$db->disconnect();
self::$db = null;
}
}
public static function setTestEnvironment($args = null, $requestMethod = null)
{
if (is_null($args)) {
$requests = new Requests();
$args = $requests->getRequestsArrayFromBulkRequest($requests->getRawBulkRequest());
$args = $_GET + $args;
}
if (is_null($requestMethod) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
$requestMethod = $_SERVER['REQUEST_METHOD'];
} elseif (is_null($requestMethod)) {
$requestMethod = 'GET';
}
// Do not run scheduled tasks during tests
if (!defined('DEBUG_FORCE_SCHEDULED_TASKS')) {
TrackerConfig::setConfigValue('scheduled_tasks_min_interval', 0);
}
// if nothing found in _GET/_POST and we're doing a POST, assume bulk request. in which case,
// we have to bypass authentication
if (empty($args) && $requestMethod == 'POST') {
TrackerConfig::setConfigValue('tracking_requests_require_authentication', 0);
}
// Tests can force the use of 3rd party cookie for ID visitor
if (\Piwik\Common::getRequestVar('forceEnableFingerprintingAcrossWebsites', false, null, $args) == 1) {
TrackerConfig::setConfigValue('enable_fingerprinting_across_websites', 1);
}
// Tests can simulate the tracker API maintenance mode
if (\Piwik\Common::getRequestVar('forceEnableTrackerMaintenanceMode', false, null, $args) == 1) {
TrackerConfig::setConfigValue('record_statistics', 0);
}
// Tests can force the use of 3rd party cookie for ID visitor
if (\Piwik\Common::getRequestVar('forceUseThirdPartyCookie', false, null, $args) == 1) {
TrackerConfig::setConfigValue('use_third_party_id_cookie', 1);
}
// Tests using window_look_back_for_visitor
if (\Piwik\Common::getRequestVar('forceLargeWindowLookBackForVisitor', false, null, $args) == 1 || strpos(json_encode($args, true), '"forceLargeWindowLookBackForVisitor":"1"') !== false) {
TrackerConfig::setConfigValue('window_look_back_for_visitor', 2678400);
}
// Tests can force the enabling of IP anonymization
if (\Piwik\Common::getRequestVar('forceIpAnonymization', false, null, $args) == 1) {
self::getDatabase();
// make sure db is initialized
$privacyConfig = new PrivacyManagerConfig();
$privacyConfig->ipAddressMaskLength = 2;
\Piwik\Plugins\PrivacyManager\IPAnonymizer::activate();
\Piwik\Tracker\Cache::deleteTrackerCache();
\Piwik\Filesystem::clearPhpCaches();
}
}
protected function loadTrackerPlugins()
{
try {
$pluginManager = PluginManager::getInstance();
$pluginsTracker = $pluginManager->loadTrackerPlugins();
$this->logger->debug("Loading plugins: { {plugins} }", ['plugins' => implode(", ", $pluginsTracker)]);
} catch (Exception $e) {
$this->logger->error('Error loading tracker plugins: {exception}', ['exception' => $e]);
}
}
private function handleFatalErrors()
{
register_shutdown_function(function () {
// TODO: add a log here
$lastError = error_get_last();
if (!empty($lastError) && $lastError['type'] == E_ERROR) {
\Piwik\Common::sendResponseCode(500);
}
});
}
private static function isDebugEnabled()
{
try {
$debug = (bool) TrackerConfig::getConfigValue('debug');
if ($debug) {
return true;
}
$debugOnDemand = (bool) TrackerConfig::getConfigValue('debug_on_demand');
if ($debugOnDemand) {
return (bool) \Piwik\Common::getRequestVar('debug', false);
}
} catch (Exception $e) {
}
return false;
}
public function isPreFlightCorsRequest() : bool
{
if (isset($_SERVER['REQUEST_METHOD']) && strtoupper($_SERVER['REQUEST_METHOD']) === 'OPTIONS') {
return !empty($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']) || !empty($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']);
}
return false;
}
}