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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
* @category Piwik_Plugins
* @package Piwik_Proxy
*/
use Piwik\Piwik;
use Piwik\Common;
/**
* Controller for proxy services
*
* @package Piwik_Proxy
*/
class Piwik_Proxy_Controller extends Piwik_Controller
{
const TRANSPARENT_PNG_PIXEL = 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=';
/**
* Output the merged CSS file.
* This method is called when the asset manager is enabled.
*
* @see core/AssetManager.php
*/
public function getCss()
{
$cssMergedFile = Piwik_AssetManager::getMergedCssFileLocation();
Piwik::serveStaticFile($cssMergedFile, "text/css");
}
/**
* Output the merged JavaScript file.
* This method is called when the asset manager is enabled.
*
* @see core/AssetManager.php
*/
public function getJs()
{
$jsMergedFile = Piwik_AssetManager::getMergedJsFileLocation();
Piwik::serveStaticFile($jsMergedFile, "application/javascript; charset=UTF-8");
}
/**
* 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);
// validate referrer
$referrer = Piwik_Url::getReferer();
if (empty($referrer) || !Piwik_Url::isLocalUrl($referrer)) {
die('Invalid Referer detected - This means that your web browser is not sending the "Referer 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 referer.
<br/><br/>You can access the page at: ' . $url);
}
// mask visits to *.piwik.org
if (!self::isPiwikUrl($url)) {
Piwik::checkUserHasSomeViewAccess();
}
if (!Common::isLookLikeUrl($url)) {
die('Please check the &url= parameter: it should to be a valid URL');
}
@header('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 $url
* @return bool True if valid; false otherwise
*/
static public function isPiwikUrl($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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