laipower/wp-content/plugins/wp-piwik/proxy/matomo.php

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2020-04-07 13:03:04 +00:00
<?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
*/
if (file_exists('config.php')) {
if (file_exists('config.local.php')) {
include 'config.local.php';
}
include 'config.php';
}
// -----
// 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.
if (! isset($PIWIK_URL)) {
$PIWIK_URL = 'http://your-piwik-domain.example.org/piwik/';
}
// Edit the line below, and replace xyz by the token_auth for the user "UserTrackingAPI"
// which you created when you followed instructions above.
if (! isset($TOKEN_AUTH)) {
$TOKEN_AUTH = 'xyz';
}
// Maximum time, in seconds, to wait for the Piwik server to return the 1*1 GIF
if (! isset($timeout)) {
$timeout = 5;
}
function sendHeader($header, $replace = true)
{
headers_sent() || header($header, $replace);
}
function arrayValue($array, $key, $value = null)
{
if (!empty($array[$key])) {
$value = $array[$key];
}
return $value;
}
function getContents($useCurl, $url, $options = false)
{
if (!$useCurl && ini_get('allow_url_fopen')) {
$ctx = ($options?stream_context_create($options):NULL);
return file_get_contents($url, 0, $ctx);
} elseif ($useCurl && function_exists('curl_version'))
return piwikFileGetContentsCurl($url, $options);
else return 'Neither url_fopen nor cURL is available. Please enable at least one of them.';
}
function piwikFileGetContentsCurl($url, $options)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, $options['http']['user_agent']);
curl_setopt($ch, CURLOPT_HTTPHEADER, array($options['http']['header']));
curl_setopt($ch, CURLOPT_TIMEOUT, $options['http']['timeout']);
curl_setopt($ch, CURLOPT_URL, $url);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
// DO NOT MODIFY BELOW
// ---------------------------
// 1) PIWIK.JS PROXY: No _GET parameter, we serve the JS file
if (empty($_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, ';'))) {
$modifiedSince = substr($modifiedSince, 0, $semicolon);
}
$modifiedSince = strtotime($modifiedSince);
}
// Re-download the piwik.js once a day maximum
$lastModified = time() - 86400;
// set HTTP response headers
sendHeader('Vary: Accept-Encoding');
// Returns 304 if not modified since
if (!empty($modifiedSince) && $modifiedSince > $lastModified) {
sendHeader(sprintf("%s 304 Not Modified", $_SERVER['SERVER_PROTOCOL']));
} else {
sendHeader('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
sendHeader('Content-Type: application/javascript; charset=UTF-8');
if ($piwikJs = getContents($useCurl, $PIWIK_URL . 'piwik.js')) {
echo $piwikJs;
} else {
sendHeader($_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) {
$url .= urlencode($key ). '=' . urlencode($value) . '&';
}
sendHeader("Content-Type: image/gif");
$stream_options = array('http' => array(
'user_agent' => arrayValue($_SERVER, 'HTTP_USER_AGENT', ''),
'header' => sprintf("Accept-Language: %s\r\n", str_replace(array("\n", "\t", "\r"), "", arrayValue($_SERVER, 'HTTP_ACCEPT_LANGUAGE', ''))),
'timeout' => $timeout
));
if (version_compare(PHP_VERSION, '5.3.0', '<')) {
// PHP 5.2 breaks with the new 204 status code so we force returning the image every time
echo getContents($useCurl, $url . '&send_image=1', $stream_options);
} else {
// PHP 5.3 and above
$content = getContents($useCurl, $url, $stream_options);
// Forward the HTTP response code
if (!headers_sent() && isset($http_response_header[0])) {
header($http_response_header[0]);
}
echo $content;
}
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 arrayValue($_SERVER, 'REMOTE_ADDR');
}