87 lines
2.4 KiB
PHP
87 lines
2.4 KiB
PHP
<?php
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/**
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* Piwik - Open source web analytics
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*
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* @link http://piwik.org
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* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
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*
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*/
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namespace Piwik\Plugins\PrivacyManager;
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use Piwik\Common;
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use Piwik\Tracker\IgnoreCookie;
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use Piwik\Tracker\Request;
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/**
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* Excludes visits where user agent's request contains either:
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*
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* - X-Do-Not-Track header (used by AdBlockPlus and NoScript)
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* - DNT header (used by Mozilla)
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*
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*/
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class DoNotTrackHeaderChecker
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{
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/**
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* Checks for DoNotTrack headers and if found, sets `$exclude` to `true`.
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*/
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public function checkHeaderInTracker(&$exclude)
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{
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if (!$this->isActive()
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|| $exclude
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) {
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return;
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}
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if ((isset($_SERVER['HTTP_X_DO_NOT_TRACK']) && $_SERVER['HTTP_X_DO_NOT_TRACK'] === '1')
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|| (isset($_SERVER['HTTP_DNT']) && substr($_SERVER['HTTP_DNT'], 0, 1) === '1')
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) {
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$request = new Request($_REQUEST);
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$ua = $request->getUserAgent();
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if (strpos($ua, 'MSIE 10') !== false
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|| strpos($ua, 'Trident/7') !== false) {
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Common::printDebug("INTERNET EXPLORER 10 and 11 enable DoNotTrack by default; so Piwik ignores DNT for all IE10 + IE11 browsers...");
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return;
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}
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$exclude = true;
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Common::printDebug("DoNotTrack found.");
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$trackingCookie = IgnoreCookie::getTrackingCookie();
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$trackingCookie->delete();
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// this is an optional supplement to the site's tracking status resource at:
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// /.well-known/dnt
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// per Tracking Preference Expression (draft)
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header('Tk: 1');
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}
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}
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/**
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* Deactivates DoNotTrack header checking. This function will not be called by the Tracker.
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*/
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public static function deactivate()
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{
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$config = new Config();
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$config->doNotTrackEnabled = false;
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}
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/**
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* Activates DoNotTrack header checking. This function will not be called by the Tracker.
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*/
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public static function activate()
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{
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$config = new Config();
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$config->doNotTrackEnabled = true;
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}
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/**
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* Returns true if server side DoNotTrack support is enabled, false if otherwise.
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*
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* @return bool
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*/
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public static function isActive()
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{
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$config = new Config();
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return $config->doNotTrackEnabled;
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}
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}
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