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

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<?php
/**
* Matomo - free/libre analytics platform
* Matomo Proxy Hide URL
*
* @link https://matomo.org/faq/how-to/#faq_132
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*/
if (!defined('MATOMO_PROXY_FROM_ENDPOINT')) {
exit; // this file is not supposed to be accessed directly
}
// if set to true, will print out more information about request errors so said errors can be more easily debugged.
$DEBUG_PROXY = false;
// set to true if the target matomo server has a ssl certificate that will fail verification, like when testing.
$NO_VERIFY_SSL = false;
if (file_exists(__DIR__ . '/config.local.php')) {
include __DIR__ . '/config.local.php';
}
// Config calls wp-load.php which on multisite networks redeclares and messes up $path
$wp_matomo_proxy_path=$path;
if (file_exists(__DIR__ . '/config.php')) {
include __DIR__ . '/config.php';
}
// Restore $path
$path=$wp_matomo_proxy_path;
// -----
// Important: read the instructions in README.md or at:
// https://github.com/matomo-org/tracker-proxy#matomo-tracker-proxy
// -----
if (! isset($MATOMO_URL) && isset($PIWIK_URL)) {
// FOR BC
$MATOMO_URL = $PIWIK_URL;
}
// Edit the line below, and replace http://your-matomo-domain.example.org/matomo/
// with your Matomo URL ending with a slash.
// This URL will never be revealed to visitors or search engines.
if (! isset($MATOMO_URL)) {
$MATOMO_URL = 'http://your-matomo-domain.example.org/matomo/';
}
// Edit the line below, and replace xyz by the token_auth for the user "UserTrackingAPI"
// which you created when you followed instructions above.
if (! isset($TOKEN_AUTH)) {
$TOKEN_AUTH = 'xyz';
}
// Maximum time, in seconds, to wait for the Matomo server to return the 1*1 GIF
if (! isset($timeout)) {
$timeout = 5;
}
// The HTTP User-Agent to set in the request sent to Matomo Tracking API
if (empty($user_agent)) {
$user_agent = arrayValue($_SERVER, 'HTTP_USER_AGENT', '');
}
// -----------------------------
// DO NOT MODIFY BELOW THIS LINE
// -----------------------------
// the HTTP response headers captured via fopen or curl
$httpResponseHeaders = array();
// 1) MATOMO.JS PROXY: No _GET parameter, we serve the JS file; or we serve a requested js file
if ((empty($_GET) && empty($_POST)) || (isset($filerequest) && substr($filerequest, -3) === '.js')) {
$modifiedSince = false;
if (isset($_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 matomo.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", $_SERVER['SERVER_PROTOCOL']));
} else {
sendHeader('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
sendHeader('Content-Type: application/javascript; charset=UTF-8');
// Silent fail: hide Warning in 'matomo.js' response
if (empty($_GET) && empty($_POST)) {
if ($path !== 'matomo.php') {
$jsPath = 'piwik.js'; // for BC eg in case user uses an older version of Matomo
} else {
$jsPath = 'matomo.js';
}
list($content, $httpStatus) = getHttpContentAndStatus($MATOMO_URL . $jsPath, $timeout, $user_agent);
} else {
list($content, $httpStatus) = getHttpContentAndStatus($MATOMO_URL . $filerequest, $timeout, $user_agent);
}
if ($matomoJs = $content) {
echo $matomoJs;
} else {
echo '/* there was an error loading matomo.js */';
}
}
exit;
}
@ini_set('magic_quotes_runtime', 0);
// 2) MATOMO.PHP PROXY: GET parameters found, this is a tracking request, we redirect it to Piwik
if (strpos($path, '?') === false) {
$path = $path . '?';
}
$extraQueryParams = array();
if (strpos($path, 'piwik.php') === 0 || strpos($path, 'matomo.php') === 0) {
$extraQueryParams = array(
'cip' => getVisitIp(),
'token_auth' => $TOKEN_AUTH,
);
}
$url = $MATOMO_URL . $path;
$url .= http_build_query(array_merge($extraQueryParams, $_GET));
if (version_compare(PHP_VERSION, '5.3.0', '<')) {
// PHP 5.2 breaks with the new 204 status code so we force returning the image every time
list($content, $httpStatus) = getHttpContentAndStatus($url . '&send_image=1', $timeout, $user_agent);
$content = sanitizeContent($content);
forwardHeaders($content);
echo $content;
} else {
// PHP 5.3 and above
list($content, $httpStatus) = getHttpContentAndStatus($url, $timeout, $user_agent);
$content = sanitizeContent($content);
forwardHeaders($content);
// Forward the HTTP response code
if (!headers_sent() && !empty($httpStatus)) {
header($httpStatus);
}
echo $content;
}
function sanitizeContent($content)
{
global $TOKEN_AUTH;
global $MATOMO_URL;
global $PROXY_URL;
global $VALID_FILES;
$matomoHost = parse_url($MATOMO_URL, PHP_URL_HOST);
$proxyHost = parse_url($PROXY_URL, PHP_URL_HOST);
$content = str_replace($TOKEN_AUTH, '<token>', $content);
$content = str_replace($MATOMO_URL, $PROXY_URL, $content);
$content = str_replace($matomoHost, $proxyHost, $content);
if(isset($VALID_FILES)) {
foreach($VALID_FILES as $filepath) {
// replace file paths to match the proxy and discard cb
$content = preg_replace('^' . $filepath . '(\?cb\=[a-z0-9]*)?^', $PROXY_URL . 'matomo-proxy.php?file=' . $filepath, $content);
}
}
return $content;
}
function forwardHeaders($content)
{
global $httpResponseHeaders;
$headersToForward = array(
'content-type',
'access-control-allow-origin',
'access-control-allow-methods',
'set-cookie',
);
foreach ($httpResponseHeaders as $header) {
$parts = explode(':', $header);
if (empty($parts[0])) {
continue;
}
$name = trim(strtolower($parts[0]));
if (in_array($name, $headersToForward)) {
sendHeader($header);
}
}
sendHeader('content-length: ' . strlen($content));
}
function getVisitIp()
{
$ipKeys = array(
'HTTP_X_FORWARDED_FOR',
'HTTP_CLIENT_IP',
'HTTP_CF_CONNECTING_IP',
);
foreach($ipKeys as $ipKey) {
if (isset($_SERVER[$ipKey])
&& filter_var($_SERVER[$ipKey], FILTER_VALIDATE_IP) !== false
) {
return $_SERVER[$ipKey];
}
}
return arrayValue($_SERVER, 'REMOTE_ADDR');
}
function transformHeaderLine($headerLine)
{
// if we're not on an https protocol, make sure cookies do not have 'secure;'
if (empty($_SERVER['HTTPS']) && preg_match('/^set-cookie:/i', $headerLine)) {
$headerLine = str_replace('secure;', '', $headerLine);
}
return $headerLine;
}
// captures a header line when using a curl request. would be better to use an anonymous function, but that would break
// PHP 5.2 support.
function handleHeaderLine($curl, $headerLine)
{
global $httpResponseHeaders;
$originalByteCount = strlen($headerLine);
$headerLine = transformHeaderLine($headerLine);
$httpResponseHeaders[] = trim($headerLine);
return $originalByteCount;
}
function getHttpContentAndStatus($url, $timeout, $user_agent)
{
global $httpResponseHeaders;
global $DEBUG_PROXY;
global $NO_VERIFY_SSL;
global $http_ip_forward_header;
$useFopen = @ini_get('allow_url_fopen') == '1';
$header = array();
$header[] = sprintf("Accept-Language: %s", str_replace(array("\n", "\t", "\r"), "", arrayValue($_SERVER, 'HTTP_ACCEPT_LANGUAGE', '')));
// NOTE: any changes made to Piwik\Plugins\PrivacyManager\DoNotTrackHeaderChecker must be made here as well
if((isset($_SERVER['HTTP_X_DO_NOT_TRACK']) && $_SERVER['HTTP_X_DO_NOT_TRACK'] === '1')) {
$header[] = "X-Do-Not-Track: 1";
}
if((isset($_SERVER['HTTP_DNT']) && substr($_SERVER['HTTP_DNT'], 0, 1) === '1')) {
$header[] = "DNT: 1";
}
if (isset($_SERVER['HTTP_COOKIE'])) {
$header[] = "Cookie: " . $_SERVER['HTTP_COOKIE'];
}
$stream_options = array(
'http' => array(
'user_agent' => $user_agent,
'header' => $header,
'timeout' => $timeout,
),
);
if ($DEBUG_PROXY) {
$stream_options['http']['ignore_errors'] = true;
}
if ($NO_VERIFY_SSL) {
$stream_options['ssl'] = array(
'verify_peer' => false,
'verify_peer_name' => false,
);
}
// if there's POST data, send our proxy request as a POST
if (!empty($_POST)) {
$postBody = file_get_contents("php://input");
$stream_options['http']['method'] = 'POST';
$stream_options['http']['header'][] = "Content-type: application/x-www-form-urlencoded";
$stream_options['http']['header'][] = "Content-Length: " . strlen($postBody);
$stream_options['http']['content'] = $postBody;
if(!empty($http_ip_forward_header)) {
$visitIp = getVisitIp();
$stream_options['http']['header'][] = "$http_ip_forward_header: $visitIp";
}
}
if($useFopen) {
$ctx = stream_context_create($stream_options);
if ($DEBUG_PROXY) {
$content = file_get_contents($url, 0, $ctx);
} else {
$content = @file_get_contents($url, 0, $ctx);
}
$httpStatus = '';
if (isset($http_response_header[0])) {
$httpStatus = $http_response_header[0];
$httpResponseHeaders = array_slice($http_response_header, 1);
$httpResponseHeaders = array_map('transformHeaderLine', $httpResponseHeaders);
}
} else {
if(!function_exists('curl_init')) {
throw new Exception("You must either set allow_url_fopen=1 in your PHP configuration, or enable the PHP Curl extension.");
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, $stream_options['http']['user_agent']);
curl_setopt($ch, CURLOPT_HTTPHEADER, $stream_options['http']['header']);
curl_setopt($ch, CURLOPT_TIMEOUT, $stream_options['http']['timeout']);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $stream_options['http']['timeout']);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADERFUNCTION, 'handleHeaderLine');
if (!empty($stream_options['http']['method'])
&& $stream_options['http']['method'] == 'POST'
) {
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $stream_options['http']['content']);
}
if (isset($stream_options['ssl']['verify_peer']) && $stream_options['ssl']['verify_peer'] == false) {
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
}
if (isset($stream_options['ssl']['verify_peer_name']) && $stream_options['ssl']['verify_peer'] == false) {
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
}
$content = curl_exec($ch);
$httpStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if(!empty($httpStatus)) {
$httpStatus = 'HTTP/1.1 ' . $httpStatus;
}
curl_close($ch);
}
return array(
$content,
$httpStatus,
);
}
function sendHeader($header, $replace = true)
{
headers_sent() || header($header, $replace);
}
function arrayValue($array, $key, $value = null)
{
if (!empty($array[$key])) {
$value = $array[$key];
}
return $value;
}