Tracker.php — Matomo Analytics – Powerful, Privacy-First Insights for WordPress 4.4.2

matomo / app / core / Tracker.php

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Tracker.php

359 lines

1	<?php
2	/**
3	* Matomo - free/libre analytics platform
4	*
5	* @link https://matomo.org
6	* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
7	*
8	*/
9	namespace Piwik;
10
11	use Exception;
12	use Piwik\Container\StaticContainer;
13	use Piwik\Plugins\BulkTracking\Tracker\Requests;
14	use Piwik\Plugins\PrivacyManager\Config as PrivacyManagerConfig;
15	use Piwik\Tracker\Db as TrackerDb;
16	use Piwik\Tracker\Db\DbException;
17	use Piwik\Tracker\Handler;
18	use Piwik\Tracker\Request;
19	use Piwik\Tracker\RequestSet;
20	use Piwik\Tracker\TrackerConfig;
21	use Piwik\Tracker\Visit;
22	use Piwik\Plugin\Manager as PluginManager;
23	use Psr\Log\LoggerInterface;
24
25	/**
26	* Class used by the logging script piwik.php called by the javascript tag.
27	* Handles the visitor and their actions on the website, saves the data in the DB,
28	* saves information in the cookie, etc.
29	*
30	* We try to include as little files as possible (no dependency on 3rd party modules).
31	*/
32	class Tracker
33	{
34	/**
35	* @var Db
36	*/
37	private static $db = null;
38
39	// We use hex ID that are 16 chars in length, ie. 64 bits IDs
40	const LENGTH_HEX_ID_STRING = 16;
41	const LENGTH_BINARY_ID = 8;
42
43	public static $initTrackerMode = false;
44
45	private $countOfLoggedRequests = 0;
46	protected $isInstalled = null;
47
48	/**
49	* @var LoggerInterface
50	*/
51	private $logger;
52
53	public function __construct()
54	{
55	$this->logger = StaticContainer::get(LoggerInterface::class);
56	}
57
58	public function isDebugModeEnabled()
59	{
60	return array_key_exists('PIWIK_TRACKER_DEBUG', $GLOBALS) && $GLOBALS['PIWIK_TRACKER_DEBUG'] === true;
61	}
62
63	public function shouldRecordStatistics()
64	{
65	$record = TrackerConfig::getConfigValue('record_statistics') != 0;
66
67	if (!$record) {
68	$this->logger->debug('Tracking is disabled in the config.ini.php via record_statistics=0');
69	}
70
71	return $record && $this->isInstalled();
72	}
73
74	public static function loadTrackerEnvironment()
75	{
76	SettingsServer::setIsTrackerApiRequest();
77	if (empty($GLOBALS['PIWIK_TRACKER_DEBUG'])) {
78	$GLOBALS['PIWIK_TRACKER_DEBUG'] = self::isDebugEnabled();
79	}
80	if (!empty($GLOBALS['PIWIK_TRACKER_DEBUG']) && !Common::isPhpCliMode()) {
81	Common::sendHeader('Content-Type: text/plain');
82	}
83	PluginManager::getInstance()->loadTrackerPlugins();
84	}
85
86	private function init()
87	{
88	$this->handleFatalErrors();
89
90	if ($this->isDebugModeEnabled()) {
91	ErrorHandler::registerErrorHandler();
92	ExceptionHandler::setUp();
93
94	$this->logger->debug("Debug enabled - Input parameters: {params}", [
95	'params' => var_export($_GET + $_POST, true),
96	]);
97	}
98	}
99
100	public function isInstalled()
101	{
102	if (is_null($this->isInstalled)) {
103	$this->isInstalled = SettingsPiwik::isMatomoInstalled();
104	}
105
106	return $this->isInstalled;
107	}
108
109	public function main(Handler $handler, RequestSet $requestSet)
110	{
111	try {
112	$this->init();
113	$handler->init($this, $requestSet);
114
115	$this->track($handler, $requestSet);
116	} catch (Exception $e) {
117	StaticContainer::get(LoggerInterface::class)->debug("Tracker encountered an exception: {ex}", [$e]);
118
119	$handler->onException($this, $requestSet, $e);
120	}
121
122	Piwik::postEvent('Tracker.end');
123	$response = $handler->finish($this, $requestSet);
124
125	$this->disconnectDatabase();
126
127	return $response;
128	}
129
130	public function track(Handler $handler, RequestSet $requestSet)
131	{
132	if (!$this->shouldRecordStatistics()) {
133	return;
134	}
135
136	$requestSet->initRequestsAndTokenAuth();
137
138	if ($requestSet->hasRequests()) {
139	$handler->onStartTrackRequests($this, $requestSet);
140	$handler->process($this, $requestSet);
141	$handler->onAllRequestsTracked($this, $requestSet);
142	}
143	}
144
145	/**
146	* @param Request $request
147	* @return array
148	*/
149	public function trackRequest(Request $request)
150	{
151	if ($request->isEmptyRequest()) {
152	$this->logger->debug('The request is empty');
153	} else {
154	$this->logger->debug('Current datetime: {date}', [
155	'date' => date("Y-m-d H:i:s", $request->getCurrentTimestamp()),
156	]);
157
158	$visit = Visit\Factory::make();
159	$visit->setRequest($request);
160	$visit->handle();
161	}
162
163	// increment successfully logged request count. make sure to do this after try-catch,
164	// since an excluded visit is considered 'successfully logged'
165	++$this->countOfLoggedRequests;
166	}
167
168	/**
169	* Used to initialize core Piwik components on a piwik.php request
170	* Eg. when cache is missed and we will be calling some APIs to generate cache
171	*/
172	public static function initCorePiwikInTrackerMode()
173	{
174	if (SettingsServer::isTrackerApiRequest()
175	&& self::$initTrackerMode === false
176	) {
177	self::$initTrackerMode = true;
178	require_once PIWIK_INCLUDE_PATH . '/core/Option.php';
179
180	Access::getInstance();
181	Config::getInstance();
182
183	try {
184	Db::get();
185	} catch (Exception $e) {
186	Db::createDatabaseObject();
187	}
188
189	PluginManager::getInstance()->loadCorePluginsDuringTracker();
190	}
191	}
192
193	public static function restoreTrackerPlugins()
194	{
195	if (SettingsServer::isTrackerApiRequest() && Tracker::$initTrackerMode) {
196	Plugin\Manager::getInstance()->loadTrackerPlugins();
197	}
198	}
199
200	public function getCountOfLoggedRequests()
201	{
202	return $this->countOfLoggedRequests;
203	}
204
205	public function setCountOfLoggedRequests($numLoggedRequests)
206	{
207	$this->countOfLoggedRequests = $numLoggedRequests;
208	}
209
210	public function hasLoggedRequests()
211	{
212	return 0 !== $this->countOfLoggedRequests;
213	}
214
215	public function isDatabaseConnected()
216	{
217	return !is_null(self::$db);
218	}
219
220	public static function getDatabase()
221	{
222	if (is_null(self::$db)) {
223	try {
224	self::$db = TrackerDb::connectPiwikTrackerDb();
225	} catch (Exception $e) {
226	$code = $e->getCode();
227	// Note: PDOException might return a string as code, but we can't use this for DbException
228	throw new DbException($e->getMessage(), is_int($code) ? $code : 0);
229	}
230	}
231
232	return self::$db;
233	}
234
235	protected function disconnectDatabase()
236	{
237	if ($this->isDatabaseConnected()) { // note: I think we do this only for the tests
238	self::$db->disconnect();
239	self::$db = null;
240	}
241	}
242
243	// for tests
244	public static function disconnectCachedDbConnection()
245	{
246	// code redundancy w/ above is on purpose; above disconnectDatabase depends on method that can potentially be overridden
247	if (!is_null(self::$db)) {
248	self::$db->disconnect();
249	self::$db = null;
250	}
251	}
252
253	public static function setTestEnvironment($args = null, $requestMethod = null)
254	{
255	if (is_null($args)) {
256	$requests = new Requests();
257	$args = $requests->getRequestsArrayFromBulkRequest($requests->getRawBulkRequest());
258	$args = $_GET + $args;
259	}
260
261	if (is_null($requestMethod) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
262	$requestMethod = $_SERVER['REQUEST_METHOD'];
263	} elseif (is_null($requestMethod)) {
264	$requestMethod = 'GET';
265	}
266
267	// Do not run scheduled tasks during tests
268	if (!defined('DEBUG_FORCE_SCHEDULED_TASKS')) {
269	TrackerConfig::setConfigValue('scheduled_tasks_min_interval', 0);
270	}
271
272	// if nothing found in _GET/_POST and we're doing a POST, assume bulk request. in which case,
273	// we have to bypass authentication
274	if (empty($args) && $requestMethod == 'POST') {
275	TrackerConfig::setConfigValue('tracking_requests_require_authentication', 0);
276	}
277
278	// Tests can force the use of 3rd party cookie for ID visitor
279	if (Common::getRequestVar('forceEnableFingerprintingAcrossWebsites', false, null, $args) == 1) {
280	TrackerConfig::setConfigValue('enable_fingerprinting_across_websites', 1);
281	}
282
283	// Tests can simulate the tracker API maintenance mode
284	if (Common::getRequestVar('forceEnableTrackerMaintenanceMode', false, null, $args) == 1) {
285	TrackerConfig::setConfigValue('record_statistics', 0);
286	}
287
288	// Tests can force the use of 3rd party cookie for ID visitor
289	if (Common::getRequestVar('forceUseThirdPartyCookie', false, null, $args) == 1) {
290	TrackerConfig::setConfigValue('use_third_party_id_cookie', 1);
291	}
292
293	// Tests using window_look_back_for_visitor
294	if (Common::getRequestVar('forceLargeWindowLookBackForVisitor', false, null, $args) == 1
295	// also look for this in bulk requests (see fake_logs_replay.log)
296	\|\| strpos(json_encode($args, true), '"forceLargeWindowLookBackForVisitor":"1"') !== false
297	) {
298	TrackerConfig::setConfigValue('window_look_back_for_visitor', 2678400);
299	}
300
301	// Tests can force the enabling of IP anonymization
302	if (Common::getRequestVar('forceIpAnonymization', false, null, $args) == 1) {
303	self::getDatabase(); // make sure db is initialized
304
305	$privacyConfig = new PrivacyManagerConfig();
306	$privacyConfig->ipAddressMaskLength = 2;
307
308	\Piwik\Plugins\PrivacyManager\IPAnonymizer::activate();
309
310	\Piwik\Tracker\Cache::deleteTrackerCache();
311	Filesystem::clearPhpCaches();
312	}
313	}
314
315	protected function loadTrackerPlugins()
316	{
317	try {
318	$pluginManager = PluginManager::getInstance();
319	$pluginsTracker = $pluginManager->loadTrackerPlugins();
320
321	$this->logger->debug("Loading plugins: { {plugins} }", [
322	'plugins' => implode(", ", $pluginsTracker),
323	]);
324	} catch (Exception $e) {
325	$this->logger->error('Error loading tracker plugins: {exception}', [
326	'exception' => $e,
327	]);
328	}
329	}
330
331	private function handleFatalErrors()
332	{
333	register_shutdown_function(function () { // TODO: add a log here
334	$lastError = error_get_last();
335	if (!empty($lastError) && $lastError['type'] == E_ERROR) {
336	Common::sendResponseCode(500);
337	}
338	});
339	}
340
341	private static function isDebugEnabled()
342	{
343	try {
344	$debug = (bool) TrackerConfig::getConfigValue('debug');
345	if ($debug) {
346	return true;
347	}
348
349	$debugOnDemand = (bool) TrackerConfig::getConfigValue('debug_on_demand');
350	if ($debugOnDemand) {
351	return (bool) Common::getRequestVar('debug', false);
352	}
353	} catch (Exception $e) {
354	}
355
356	return false;
357	}
358	}
359