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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
* @version $Id$
*
* @category Piwik_Plugins
* @package Piwik_Proxy
*/
/**
* Controller for proxy services
*
* @package Piwik_Proxy
*/
class Piwik_Proxy_Controller extends Piwik_Controller
{
const TRANSPARENT_PNG_PIXEL = 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=';
/**
* Display the "Export Image" window.
*
* @param string $imageData Base-64 encoded image data (via $_POST)
*/
static public function exportImageWindow()
{
Piwik::checkUserHasSomeViewAccess();
$view = Piwik_View::factory('exportImage');
$view->imageData = 'data:image/png;base64,'. Piwik_Common::getRequestVar('imageData', self::TRANSPARENT_PNG_PIXEL, 'string', $_POST);
echo $view->render();
}
function exportImage()
{
self::exportImageWindow();
}
/**
* Output binary image from base-64 encoded data.
*
* @param string $imageData Base-64 encoded image data (via $_POST)
*/
static public function outputBinaryImage()
{
Piwik::checkUserHasSomeViewAccess();
header('Content-Type: image/png');
$data = base64_decode(Piwik_Common::getRequestVar('imageData', self::TRANSPARENT_PNG_PIXEL, 'string', $_POST));
if(function_exists('imagecreatefromstring'))
{
// validate image data
$imgResource = imagecreatefromstring($data);
if($imgResource !== false)
{
// output image and clean-up
imagepng($imgResource);
imagedestroy($imgResource);
}
}
else
{
echo $data;
}
exit;
}
function outputImage()
{
self::outputBinaryImage();
}
/**
* 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 the CSS3PIE PIE.htc file
*
* @see /libs/CSS3PIE
*/
public function getPieHtc ()
{
Piwik::serveStaticFile(PIWIK_INCLUDE_PATH ."/libs/CSS3PIE/PIE.htc", "text/x-component");
}
/**
* Output redirection page instead of linking directly to avoid
* exposing the referer on the Piwik demo.
*
* @param string $url (via $_GET)
*/
public function redirect()
{
// validate referer
$referer = Piwik_Url::getReferer();
if(!empty($referer) && (Piwik_Url::getLocalReferer() === false))
{
exit;
}
$url = Piwik_Common::getRequestVar('url', '', 'string', $_GET);
// mask visits to *.piwik.org
if(self::isPiwikUrl($url))
{
echo
'<html><head>
<meta http-equiv="refresh" content="0;url=' . $url . '" />
</head></html>';
}
// standard redirect for other whitelisted URLs
if(self::isAcceptableRemoteUrl($url))
{
Piwik_Url::redirectToUrl($url);
exit;
}
}
/**
* Validate URL against *.piwik.org domains
*
* @param string $url
* @return bool True if valid; false otherwise
*/
static public function isPiwikUrl($url)
{
if(preg_match('~^http://(qa\.|demo\.|dev\.|forum\.)?piwik.org([#?/]|$)~', $url))
{
return true;
}
return false;
}
/**
* Validate URL against a whitelist, so action=redirect can't be
* used as an open redirect proxy.
*
* @param string $url
* @return bool True if valid; false otherwise
*/
static public function isAcceptableRemoteUrl($url)
{
$homepageUrls = array();
$listPlugins = Piwik_PluginsManager::getInstance()->readPluginsDirectory();
foreach($listPlugins as $pluginName)
{
$oPlugin = Piwik_PluginsManager::getInstance()->loadPlugin($pluginName);
$info = $oPlugin->getInformation();
if((isset($info['homepage']) && $url == $info['homepage'])
|| (isset($info['author_homepage']) && $url == $info['author_homepage'])
|| (isset($info['license_homepage']) && $url == $info['license_homepage']))
{
return true;
}
}
return false;
}
}
|
