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<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Plugins\Proxy;
use Piwik\AssetManager;
use Piwik\AssetManager\UIAsset;
use Piwik\Common;
use Piwik\Piwik;
use Piwik\ProxyHttp;
use Piwik\Url;
use Piwik\UrlHelper;
/**
* Controller for proxy services
*
*/
class Controller extends \Piwik\Plugin\Controller
{
const TRANSPARENT_PNG_PIXEL = 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=';
const JS_MIME_TYPE = "application/javascript; charset=UTF-8";
/**
* Output the merged CSS file.
* This method is called when the asset manager is enabled.
*
* @see core/AssetManager.php
*/
public function getCss()
{
$cssMergedFile = AssetManager::getInstance()->getMergedStylesheet();
ProxyHttp::serverStaticFile($cssMergedFile->getAbsoluteLocation(), "text/css");
}
/**
* Output the merged core JavaScript file.
* This method is called when the asset manager is enabled.
*
* @see core/AssetManager.php
*/
public function getCoreJs()
{
$jsMergedFile = AssetManager::getInstance()->getMergedCoreJavaScript();
$this->serveJsFile($jsMergedFile);
}
/**
* Output the merged non core JavaScript file.
* This method is called when the asset manager is enabled.
*
* @see core/AssetManager.php
*/
public function getNonCoreJs()
{
$jsMergedFile = AssetManager::getInstance()->getMergedNonCoreJavaScript();
$this->serveJsFile($jsMergedFile);
}
/**
* @param UIAsset $uiAsset
*/
private function serveJsFile($uiAsset)
{
ProxyHttp::serverStaticFile($uiAsset->getAbsoluteLocation(), self::JS_MIME_TYPE);
}
/**
* Output redirection page instead of linking directly to avoid
* exposing the referrer on the Piwik demo.
*
* @internal param string $url (via $_GET)
*/
public function redirect()
{
$url = Common::getRequestVar('url', '', 'string', $_GET);
if (!UrlHelper::isLookLikeUrl($url)) {
die('Please check the &url= parameter: it should to be a valid URL');
}
// validate referrer
$referrer = Url::getReferrer();
if (empty($referrer) || !Url::isLocalUrl($referrer)) {
die('Invalid Referrer detected - This means that your web browser is not sending the "Referrer URL" which is
required to proceed with the redirect. Verify your browser settings and add-ons, to check why your browser
is not sending this referrer.
<br/><br/>You can access the page at: ' . $url);
}
// mask visits to *.piwik.org
if (!self::isPiwikUrl($url)) {
Piwik::checkUserHasSomeViewAccess();
}
Common::sendHeader('Content-Type: text/html; charset=utf-8');
echo '<html><head><meta http-equiv="refresh" content="0;url=' . $url . '" /></head></html>';
exit;
}
/**
* Validate URL against *.piwik.org domains
*
* @param string $url
* @return bool True if valid; false otherwise
*/
public static function isPiwikUrl($url)
{
// guard for IE6 meta refresh parsing weakness (OSVDB 19029)
if (strpos($url, ';') !== false
|| strpos($url, ';') !== false
) {
return false;
}
if (preg_match('~^http://(qa\.|demo\.|dev\.|forum\.)?piwik.org([#?/]|$)~', $url)) {
return true;
}
// Allow clockworksms domain
if (strpos($url, 'http://www.clockworksms.com/') === 0) {
return true;
}
return false;
}
}
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