baidu_tongji-8.x-1.x-dev/baidu_analytics.module
baidu_analytics.module
<?php
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\File\FileSystemInterface;
/**
* @file
* Drupal Module: Baidu Analytics
*
* Adds the required Javascript to all your Drupal pages to allow tracking by
* the Baidu Analytics statistics package.
*/
use Drupal\Component\Serialization\Json;
use Drupal\Component\Utility\Crypt;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;
/**
* Define the default file extension list that should be tracked as download.
*/
define('BAIDU_ANALYTICS_TRACKFILES_EXTENSIONS', '7z|aac|arc|arj|asf|asx|avi|bin|csv|doc|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|msi|msp|pdf|phps|png|ppt|qtm?|ra(m|r)?|sea|sit|tar|tgz|torrent|txt|wav|wma|wmv|wpd|xls|xml|z|zip');
/**
* Define default path exclusion list to remove tracking from admin pages,
* see http://drupal.org/node/34970 for more information.
*/
define('BAIDU_ANALYTICS_PAGES', "admin\nadmin/*\nbatch\nnode/add*\nnode/*/*\nuser/*/*");
/**
* Define Asynchronous Tracker Code Library URL.
*/
define('BAIDU_ANALYTICS_ASYNC_LIBRARY_URL', 'hm.baidu.com/hm.js');
/**
* Define Standard Tracker Code Library URL.
*/
define('BAIDU_ANALYTICS_STANDARD_LIBRARY_URL', 'hm.baidu.com/h.js');
/**
* Implements hook_help().
*/
function baidu_analytics_help($route_name, RouteMatchInterface $route_match) {
switch ($route_name) {
case 'help.page.baidu_analytics':
$output = '<h3>' . t('About') . '</h3>';
$output .= '<p>' . t('Baidu Analytics adds a web statistics tracking system to your website. This system incorporates numerous statistical features. For an extensive listing of these features see the <a href=":project">Baidu Analytics</a> project site. Beyond that, additional information can be found at the <a href=":documentation">Drupal - Baidu Analytics documentation</a>.', [':documentation' => 'https://www.drupal.org/node/2076737', ':project' => 'https://www.drupal.org/project/baidu_analytics']) . '</p>';
$output .= '<h3>' . t('Uses') . '</h3>';
$output .= '<dt>' . t('Configuring Baidu Analytics') . '</dt>';
$output .= '<dd>' . t('All settings for this module can be found on the <a href=":ba_settings">Baidu Analytics settings</a> page. When entering the Baidu Analytics account number here, it will automatically add the required JavaScript to every page generated. The <em>General Settings</em> section on this page provides additional instruction about setting up tracking thru the Baidu account.', [':ba_settings' => Url::fromRoute('baidu_analytics.admin_settings_form')->toString()]) . '</dd>';
$output .= '<dt>' . t('Additional features') . '</dt>';
$output .= '<dd>' . t('The Baidu Analytics module offers a bit more than basic tracking. <em>Page Tracking</em> for instance allows you to provide a list of pages to track, or a list of pages not to track. Role and Link tracking features are also available. For a comprehensive discussion on the setup and use of its many feature see the <a href=":documentation">Drupal - Baidu Analytics documentation</a>.', [':documentation' => 'https://www.drupal.org/node/2076737']) . '</dd>';
return $output;
case 'baidu_analytics.admin_settings_form':
return t('<a href="@btj_url">Baidu Analytics</a> is a free (registration required) website traffic and marketing effectiveness service.', array('@btj_url' => 'http://tongji.baidu.com/'));
}
}
/**
* Implements hook_page_attachments().
*/
function baidu_analytics_page_attachments(&$page) {
$user = \Drupal::currentUser();
$config = \Drupal::config('baidu_analytics.settings');
// Get the web property ID for which the tracking code should be generated.
$id = $config->get('baidu_analytics_account');
$request = \Drupal::request();
// Get page http status code for visibility filtering.
$status = NULL;
if ($exception = $request->attributes->get('exception')) {
$status = $exception->getStatusCode();
}
$trackable_status_codes = array(
'403', // Forbidden
'404', // Not Found
);
// 1. Check if the Baidu account number has a value.
// 2. Track page views based on visibility value.
// 3. Check if we should track the currently active user's role.
// 4. Ignore pages visibility filter for 404 or 403 status codes.
if (!empty($id) && (_baidu_analytics_visibility_pages() || in_array($status, $trackable_status_codes)) && _baidu_analytics_visibility_user($user)) {
// Allow user to override the scope for script inclusion in the page.
$scope = $config->get('baidu_analytics_js_scope');
// Select recommended scope depending on the type of code to generate.
if ($scope == 'default') {
if ($config->get('baidu_analytics_code_type') == 'standard') {
// Standard code is recommended to be added in 'footer'.
$scope = 'footer';
}
else {
// Asynchronous code is recommended to be added in 'header'.
$scope = 'header';
}
}
// Add link tracking.
$link_settings = array();
if ($track_outbound = $config->get('baidu_analytics_trackoutbound')) {
$link_settings['trackOutbound'] = $track_outbound;
}
if ($track_mailto = $config->get('baidu_analytics_trackmailto')) {
$link_settings['trackMailto'] = $track_mailto;
}
if (($track_download = $config->get('baidu_analytics_trackfiles')) && ($trackfiles_extensions = $config->get('baidu_analytics_trackfiles_extensions'))) {
$link_settings['trackDownload'] = $track_download;
$link_settings['trackDownloadExtensions'] = $trackfiles_extensions;
}
if (!empty($link_settings)) {
$page['#attached']['drupalSettings']['baidu_analytics'] = $link_settings;
$page['#attached']['library'][] = 'baidu_analytics/baidu_analytics';
}
// Add messages tracking.
$message_events = '';
if ($message_types = $config->get('baidu_analytics_trackmessages')) {
$message_types = array_values(array_filter($message_types));
$status_heading = array(
'status' => t('Status message'),
'warning' => t('Warning message'),
'error' => t('Error message'),
);
$drupal_messages = \Drupal::messenger()->all();
foreach ($drupal_messages as $type => $messages) {
// Track only the selected message types.
if (in_array($type, $message_types)) {
foreach ($messages as $message) {
$message_events .= '_hmt.push(["_trackEvent", ' . Json::encode(t('Messages')) . ', ' . Json::encode($status_heading[$type]) . ', ' . Json::encode($status_heading[$type] . ': ' . strip_tags($message)) . ']);';
}
}
}
}
// Site search tracking support.
$url_custom = '';
if (\Drupal::moduleHandler()->moduleExists('search') && $config->get('baidu_analytics_site_search') && (strpos(\Drupal::routeMatch()->getRouteName(), 'search.view') === 0) && $keys = ($request->query->has('keys') ? trim($request->get('keys')) : '')) {
global $pager_total_items;
$entity_id = \Drupal::routeMatch()->getParameter('entity')->id();
// If there are results, include the keys and the total count.
if ($pager_total_items != 0) {
$url_custom = Url::fromRoute('search.view_' . $entity_id, [], ['query' => ['search' => $keys, 'total-results' => intval($pager_total_items[0])]])->toString();
}
else {
// Make sure no results keys are included in the tracked URL.
$url_custom = Url::fromRoute('search.view_' . $entity_id, [], ['query' => ['search' => 'no-results:' . $keys, 'cat' => 'no-results']])->toString();
}
}
// If this node is translated from another one, pass the original instead.
if (\Drupal::moduleHandler()->moduleExists('content_translation') && $config->get('baidu_analytics_translation_set')) {
// Check we have a node object, it supports translation, and its
// translated node ID (tnid) doesn't match its own node ID.
if ($request->attributes->has('node')) {
$node = $request->attributes->get('node');
if ($node instanceof NodeInterface && \Drupal::service('entity.repository')->getTranslationFromContext($node) !== $node->getUntranslated()) {
$url_custom = Url::fromRoute('entity.node.canonical', ['node' => $node->id()], ['language' => $node->getUntranslated()->language()])->toString();
}
}
}
// Track access denied (403) and file not found (404) pages.
$referer_uri = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '';
$current_uri = $request->getRequestUri() == '' ? '/' : $request->getRequestUri();
// Report a specific URL containing referer and current page URL.
if ($status == '403') {
$url_custom = "/403.html?page={$current_uri}&from={$referer_uri}";
}
elseif ($status == '404') {
$url_custom = "/404.html?page={$current_uri}&from={$referer_uri}";
}
// Add any custom code snippets if specified.
$codesnippet_before = $config->get('baidu_analytics_codesnippet_before');
$codesnippet_after = $config->get('baidu_analytics_codesnippet_after');
$baidu_analytics_custom_vars = $config->get('baidu_analytics_custom_var');
$custom_var = '';
for ($i = 1; $i < 6; $i++) {
$custom_var_name = !empty($baidu_analytics_custom_vars['slots'][$i]['name']) ? $baidu_analytics_custom_vars['slots'][$i]['name'] : '';
if (!empty($custom_var_name)) {
$custom_var_value = !empty($baidu_analytics_custom_vars['slots'][$i]['value']) ? $baidu_analytics_custom_vars['slots'][$i]['value'] : '';
$custom_var_scope = !empty($baidu_analytics_custom_vars['slots'][$i]['scope']) ? $baidu_analytics_custom_vars['slots'][$i]['scope'] : 3;
$types = array();
if ($request->attributes->has('node')) {
$node = $request->attributes->get('node');
if ($node instanceof NodeInterface) {
$types += ['node' => $node];
}
}
$custom_var_name = \Drupal::token()->replace($custom_var_name, $types, array('clear' => TRUE));
$custom_var_value = \Drupal::token()->replace($custom_var_value, $types, array('clear' => TRUE));
// Suppress empty custom names and/or variables.
if (!Unicode::strlen(trim($custom_var_name)) || !Unicode::strlen(trim($custom_var_value))) {
continue;
}
// The length of the string used for the 'name' and the one used for
// the 'value' must not exceed 128 bytes after url encoding.
$name_length = Unicode::strlenn(rawurlencode($custom_var_name));
$tmp_value = rawurlencode($custom_var_value);
$value_length = Unicode::strlen($tmp_value);
if ($name_length + $value_length > 128) {
// Trim value and remove fragments of url encoding.
$tmp_value = rtrim(substr($tmp_value, 0, 127 - $name_length), '%0..9A..F');
$custom_var_value = urldecode($tmp_value);
}
$custom_var_name = Json::encode($custom_var_name);
$custom_var_value = Json::encode($custom_var_value);
$custom_var .= "_hmt.push(['_setCustomVar', $i, $custom_var_name, $custom_var_value, $custom_var_scope]);";
}
}
// Start putting together the javascript code to be inserted in the page.
$script = 'var _hmt = _hmt || [];';
$script .= '_hmt.push(["_setAccount", ' . Json::encode($id) . ']);';
if (!empty($custom_var)) {
$script .= $custom_var;
}
if (!empty($codesnippet_before)) {
$script .= $codesnippet_before;
}
if (empty($url_custom)) {
$script .= '_hmt.push(["_trackPageview"]);';
}
else {
$script .= '_hmt.push(["_trackPageview", "' . $url_custom . '"]);';
}
if (!empty($message_events)) {
$script .= $message_events;
}
if (!empty($codesnippet_after)) {
$script .= $codesnippet_after;
}
// Determine which type of code should be used: async or standard.
if ($config->get('baidu_analytics_code_type') == 'standard') {
// Provide Standard BATC file URL on server if it is locally cached.
if ($config->get('baidu_analytics_cache') && $library_tracker_url = _baidu_analytics_cache(BAIDU_ANALYTICS_STANDARD_LIBRARY_URL)) {
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed.
$query_string = '?' . (\Drupal::state()->get('system.css_js_query_string') ?: '0');
$library_tracker_url .= $query_string;
}
else {
// If no cache is found, provide Standard Code Tracker library URL.
$library_tracker_url = '//' . BAIDU_ANALYTICS_STANDARD_LIBRARY_URL . '?' . $id;
}
$script .= 'document.write(unescape("%3Cscript src=\'' . $library_tracker_url . "' type='text/javascript'%3E%3C/script%3E\"));";
}
else {
// Provide Asynchronous BATC file URL on server if it is locally cached.
if ($config->get('baidu_analytics_cache') && $library_tracker_url = _baidu_analytics_cache(BAIDU_ANALYTICS_ASYNC_LIBRARY_URL)) {
// Add dummy query-string to filenames, same trick as the case above.
$query_string = '?' . (\Drupal::state()->get('system.css_js_query_string') ?: '0');
$library_tracker_url .= $query_string;
}
else {
// If no cache is found, provide Asynchronous Code Tracker library URL.
$library_tracker_url = '//' . BAIDU_ANALYTICS_ASYNC_LIBRARY_URL . '?' . $id;
}
// Asynchronous JavaScript tracking code.
$script .= "(function() {var hm = document.createElement('script');hm.src = '{$library_tracker_url}';hm.type = 'text/javascript';var s = document.getElementsByTagName('script')[0];s.parentNode.insertBefore(hm, s);})()";
}
$page['#attached']['html_head'][] = [
[
'#tag' => 'script',
'#value' => $script,
'#scope' => $scope,
],
'baidu_analytics_tracking_script'
];
}
}
/**
* Implements hook_field_extra_fields().
*/
function baidu_analytics_entity_extra_field_info() {
$extra = array();
$extra['user']['user']['form']['baidu_analytics'] = array(
'label' => t('Baidu Analytics configuration'),
'description' => t('Baidu Analytics module form element.'),
'weight' => 3,
);
return $extra;
}
/**
* Implements hook_form_FORM_ID_alter().
*
* Allow users to decide if tracking code will be added to pages or not.
*/
function baidu_analytics_form_user_form_alter(&$form, FormStateInterface $form_state, $form_id) {
$config = \Drupal::config('baidu_analytics.settings');
$account = $form_state->getFormObject()->getEntity();
//$category = $form['#user_category'];
if (\Drupal::currentUser()->hasPermission('opt-in or out of tracking') && ($visibility_user_account_mode = $config->get('baidu_analytics_custom')) != 0 && _baidu_analytics_visibility_roles($account)) {
$account_data_baidu_analytics = \Drupal::service('user.data')->get('baidu_analytics', $account->id());
$form['baidu_analytics'] = array(
'#type' => 'details',
'#title' => t('Baidu Analytics configuration'),
'#weight' => 3,
'#open' => TRUE,
);
switch ($visibility_user_account_mode) {
case 1:
$description = t('Users are tracked by default, but you are able to opt out.');
break;
case 2:
$description = t('Users are <em>not</em> tracked by default, but you are able to opt in.');
break;
}
// Disable tracking for visitors who have opted out from tracking via DNT
// (Do-Not-Track) header.
$disabled = FALSE;
if ($config->get('baidu_analytics_privacy_donottrack') && !empty($_SERVER['HTTP_DNT'])) {
$disabled = TRUE;
// Override settings value.
$account_data_baidu_analytics['baidu_analytics_custom'] = FALSE;
$description .= '<span class="admin-disabled">';
$description .= ' ' . t('You have opted out from tracking via browser privacy settings.');
$description .= '</span>';
}
$form['baidu_analytics']['baidu_analytics_custom'] = array(
'#type' => 'checkbox',
'#title' => t('Enable user tracking'),
'#description' => $description,
'#default_value' => isset($account_data_baidu_analytics['baidu_analytics_custom']) ? $account_data_baidu_analytics['baidu_analytics_custom'] : ($visibility_user_account_mode == 1),
'#disabled' => $disabled,
);
// hook_user_update() is missing in D8, add custom submit handler.
$form['actions']['submit']['#submit'][] = 'baidu_analytics_user_profile_form_submit';
}
}
/**
* Submit callback for user profile form to save the Baidu Analytics setting.
*/
function baidu_analytics_user_profile_form_submit($form, FormStateInterface $form_state) {
$account = $form_state->getFormObject()->getEntity();
if ($account->id() && $form_state->hasValue('baidu_analytics_custom')) {
\Drupal::service('user.data')->set('baidu_analytics', $account->id(), 'baidu_analytics_custom', (int) $form_state->getValue('baidu_analytics_custom'));
}
}
/**
* Implements hook_cron().
*/
function baidu_analytics_cron() {
$config = \Drupal::config('baidu_analytics.settings');
// Regenerate the tracking code file every day.
if ($config->get('baidu_analytics_cache') && \Drupal::time()->getRequestTime() - $config->get('baidu_analytics_last_cache') >= 86400) {
// Depending on the type of code selected, provide the correct tracker url.
if ($config->get('baidu_analytics_code_type') == 'standard') {
$library_tracker_url = BAIDU_ANALYTICS_STANDARD_LIBRARY_URL;
}
else {
$library_tracker_url = BAIDU_ANALYTICS_ASYNC_LIBRARY_URL;
}
_baidu_analytics_cache($library_tracker_url, TRUE);
\Drupal::configFactory()->getEditable('baidu_analytics.settings')->set('baidu_analytics_last_cache', \Drupal::time()->getRequestTime())->save();
}
}
/**
* Helper function for grabbing search keys. Function is missing in D7.
*
* http://api.drupal.org/api/function/search_get_keys/6
*/
function baidu_analytics_search_get_keys() {
static $return;
if (!isset($return)) {
// Extract keys as remainder of path
// Note: support old GET format of searches for existing links.
$path = explode('/', $_GET['q'], 3);
$keys = empty($_REQUEST['keys']) ? '' : $_REQUEST['keys'];
$return = count($path) == 3 ? $path[2] : $keys;
}
return $return;
}
/**
* Download/Synchronize/Cache tracking code file locally.
*
* @param string $location
* The full URL to the external javascript file.
* @param bool $sync_cached_file
* Synchronize tracking code and update if remote file have changed.
*
* @return mixed
* The path to the local javascript file on success, boolean FALSE on failure.
*/
function _baidu_analytics_cache($location, $sync_cached_file = FALSE) {
$config = \Drupal::config('baidu_analytics.settings');
$path = 'public://baidu_analytics';
$baidu_analytics_account = $config->get('baidu_analytics_account');
// Use a tracker specific cache file to allow multiple codes on same site.
$tracker_hash = mb_substr($baidu_analytics_account, 0, 7);
$file_destination = $path . '/' . (!empty($tracker_hash) ? $tracker_hash . '-' : '') . basename($location);
if (!file_exists($file_destination) || $sync_cached_file) {
global $base_url;
// Get current server's protocol to match with the request.
$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? 'https://' : 'http://';
$location = $protocol . $location . '?' . $baidu_analytics_account;
try {
$response = \Drupal::httpClient()->get($location, [
'headers' => [
'referer' => $base_url,
],
]);
$data = $response->getBody(TRUE);
if (file_exists($file_destination)) {
// Synchronize tracking code and and replace local file if outdated.
$data_hash_local = Crypt::hashBase64(file_get_contents($file_destination));
$data_hash_remote = Crypt::hashBase64($data);
// Check that the files directory is writable.
if ($data_hash_local != $data_hash_remote && \Drupal::service('file_system')->prepareDirectory($path)) {
// Save updated tracking code file to disk.
\Drupal::service('file_system')->saveData($data, $file_destination, FileSystemInterface::EXISTS_REPLACE);
\Drupal::logger('baidu_analytics')->info('Locally cached tracking code file has been updated.');
// Change query-strings on css/js files to enforce reload for all.
_drupal_flush_css_js();
}
}
else {
// Check that the files directory is writable.
if (\Drupal::service('file_system')->prepareDirectory($path, FileSystemInterface::CREATE_DIRECTORY)) {
// There is no need to flush JS here as core refreshes JS caches
// automatically, if new files are added.
\Drupal::service('file_system')->saveData($data, $file_destination, FileSystemInterface::EXISTS_REPLACE);
\Drupal::logger('baidu_analytics')->info('Locally cached tracking code file has been saved.');
// Return the local JS file path.
return file_url_transform_relative(file_create_url($file_destination));
}
}
}
catch (RequestException $exception) {
watchdog_exception('baidu_analytics', $exception);
}
}
else {
// Return the local JS file path.
return file_url_transform_relative(file_create_url($file_destination));
}
}
/**
* Delete cached files and directory.
*/
function baidu_analytics_clear_js_cache() {
$path = 'public://baidu_analytics';
if (\Drupal::service('file_system')->prepareDirectory($path)) {
\Drupal::service('file_system')->scanDirectory($path, '/.*/', array('callback' => 'file_unmanaged_delete'));
\Drupal::service("file_system")->rmdir($path);
// Change query-strings on css/js files to enforce reload for all users.
_drupal_flush_css_js();
\Drupal::logger('baidu_analytics')->info('Local cache has been purged.', array());
}
}
/**
* Tracking visibility check for an user object.
*
* @param object $account
* A user object containing an array of roles to check.
*
* @return bool
* A decision on if the current user is being tracked by Baidu Analytics.
*/
function _baidu_analytics_visibility_user($account) {
$enabled = FALSE;
// Is current user a member of a role that should be tracked?
if (_baidu_analytics_visibility_header($account) && _baidu_analytics_visibility_roles($account)) {
// Use the user's block visibility setting, if necessary.
if (($custom = \Drupal::config('baidu_analytics.settings')->get('baidu_analytics_custom')) != 0) {
if ($account->uid && isset($account->data['baidu_analytics']['custom'])) {
$enabled = $account->data['baidu_analytics']['custom'];
}
else {
$enabled = ($custom == 1);
}
}
else {
$enabled = TRUE;
}
}
return $enabled;
}
/**
* Helper function to check if tracking code should display for current roles.
*
* Based on visibility setting this function returns TRUE if BA code should be
* added for the current role and otherwise FALSE.
*/
function _baidu_analytics_visibility_roles($account) {
$visibility = \Drupal::config('baidu_analytics.settings')->get('baidu_analytics_visibility_roles');
$enabled = $visibility;
$roles = array_filter(\Drupal::config('baidu_analytics.settings')->get('baidu_analytics_roles'));
if (count($roles) > 0) {
// One or more roles are selected.
foreach (array_values($account->getRoles()) as $user_role) {
// Is the current user a member of one of these roles?
if (in_array($user_role, $roles)) {
// Current user is a member of a role that should be tracked or
// excluded from tracking.
$enabled = !$visibility;
break;
}
}
}
else {
// No role is selected for tracking, therefore all roles should be tracked.
$enabled = TRUE;
}
return $enabled;
}
/**
* Helper function to check if tracking code should display for current page.
*
* Based on visibility setting this function returns TRUE if BA code should be
* added to the current page and otherwise FALSE.
*/
function _baidu_analytics_visibility_pages() {
$config = \Drupal::config('baidu_analytics.settings');
static $page_match;
// Cache visibility result if function is called more than once.
if (!isset($page_match)) {
$visibility = $config->get('baidu_analytics_visibility_pages');
$setting_pages = $config->get('baidu_analytics_pages');
// Match path if necessary.
if (!empty($setting_pages)) {
// Convert path to lowercase. This allows comparison of the same path
// with different case. Ex: /Page, /page, /PAGE.
$pages = mb_strtolower($setting_pages);
if ($visibility < 2) {
$current_path = \Drupal::service('path.current')->getPath();
$path = \Drupal::service('path_alias.manager')->getAliasByPath($current_path);
// Convert the Drupal path to lowercase.
$path = mb_strtolower($path);
// Compare the lowercase internal and lowercase path alias (if any).
$page_match = \Drupal::service('path.matcher')->matchPath($path, $pages);
if ($path != $current_path) {
$page_match = $page_match || \Drupal::service('path.matcher')->matchPath($current_path, $pages);
}
// When $visibility has a value of 0, the tracking code is displayed on
// all pages except those listed in $pages. When set to 1, it
// is displayed only on those pages listed in $pages.
$page_match = !($visibility xor $page_match);
}
elseif (\Drupal::moduleHandler()->moduleExists('php')) {
$page_match = php_eval($setting_pages);
}
else {
$page_match = FALSE;
}
}
else {
$page_match = TRUE;
}
}
return $page_match;
}
/**
* Helper function to check if user's DNT is set and hide tracking code.
*
* Based on headers sent by clients this function returns TRUE if BA code
* should be added to the current page and otherwise FALSE.
*/
function _baidu_analytics_visibility_header($account) {
$config = \Drupal::config('baidu_analytics.settings');
if (($account->id() || \Drupal::config('system.performance')->get('cache.page.max_age') == 0) && $config->get('baidu_analytics_privacy_donottrack') && !empty($_SERVER['HTTP_DNT'])) {
// Disable tracking if caching is disabled or a visitors is logged in and
// have opted out from tracking via DNT (Do-Not-Track) header.
return FALSE;
}
return TRUE;
}
