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<?php
/**
* Piwik - free/libre analytics platform
* Piwik Proxy Hide URL
*
* @link http://piwik.org/faq/how-to/#faq_132
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*/
// -----
// Important: read the instructions in README.md or at:
// https://github.com/piwik/piwik/tree/master/misc/proxy-hide-piwik-url#piwik-proxy-hide-url
// -----
// Edit the line below, and replace http://your-piwik-domain.example.org/piwik/
// with your Piwik URL ending with a slash.
// This URL will never be revealed to visitors or search engines.
$PIWIK_URL = 'http://your-piwik-domain.example.org/piwik/';
// Edit the line below, and replace xyz by the token_auth for the user "UserTrackingAPI"
// which you created when you followed instructions above.
$TOKEN_AUTH = 'xyz';
// Maximum time, in seconds, to wait for the Piwik server to return the 1*1 GIF
$timeout = 5;
// DO NOT MODIFY BELOW
// ---------------------------
// 1) PIWIK.JS PROXY: No _GET parameter, we serve the JS file
if (empty($_GET)) {
$modifiedSince = false;
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$modifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
// strip any trailing data appended to header
if (false !== ($semicolon = strpos($modifiedSince, ';'))) {
$modifiedSince = strtotime(substr($modifiedSince, 0, $semicolon));
}
}
// Re-download the piwik.js once a day maximum
$lastModified = time() - 86400;
// set HTTP response headers
header('Vary: Accept-Encoding');
// Returns 304 if not modified since
if (!empty($modifiedSince) && $modifiedSince < $lastModified) {
header(sprintf("%s 304 Not Modified", $_SERVER['SERVER_PROTOCOL']));
} else {
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
@header('Content-Type: application/javascript; charset=UTF-8');
if ($piwikJs = file_get_contents($PIWIK_URL . 'piwik.js')) {
echo $piwikJs;
} else {
header($_SERVER['SERVER_PROTOCOL'] . '505 Internal server error');
}
}
exit;
}
@ini_set('magic_quotes_runtime', 0);
// 2) PIWIK.PHP PROXY: GET parameters found, this is a tracking request, we redirect it to Piwik
$url = sprintf("%spiwik.php?cip=%s&token_auth=%s&", $PIWIK_URL, getVisitIp(), $TOKEN_AUTH);
foreach ($_GET as $key => $value) {
$url .= $key . '=' . urlencode($value) . '&';
}
header("Content-Type: image/gif");
$stream_options = array('http' => array(
'user_agent' => @$_SERVER['HTTP_USER_AGENT'],
'header' => sprintf("Accept-Language: %s\r\n", @str_replace(array("\n", "\t", "\r"), "", $_SERVER['HTTP_ACCEPT_LANGUAGE'])),
'timeout' => $timeout
));
$ctx = stream_context_create($stream_options);
echo file_get_contents($url, 0, $ctx);
function getVisitIp()
{
$matchIp = '/^([0-9]{1,3}\.){3}[0-9]{1,3}$/';
$ipKeys = array(
'HTTP_X_FORWARDED_FOR',
'HTTP_CLIENT_IP',
'HTTP_CF_CONNECTING_IP',
);
foreach($ipKeys as $ipKey) {
if (isset($_SERVER[$ipKey])
&& preg_match($matchIp, $_SERVER[$ipKey])) {
return $_SERVER[$ipKey];
}
}
return @$_SERVER['REMOTE_ADDR'];
}
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