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137
wp-content/plugins/wp-piwik/proxy/matomo.php
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137
wp-content/plugins/wp-piwik/proxy/matomo.php
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<?php
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/**
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* Piwik - free/libre analytics platform
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* Piwik Proxy Hide URL
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*
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* @link http://piwik.org/faq/how-to/#faq_132
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* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
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*/
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if (file_exists('config.php')) {
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if (file_exists('config.local.php')) {
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include 'config.local.php';
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}
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include 'config.php';
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}
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// -----
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// Important: read the instructions in README.md or at:
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// https://github.com/piwik/piwik/tree/master/misc/proxy-hide-piwik-url#piwik-proxy-hide-url
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// -----
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// Edit the line below, and replace http://your-piwik-domain.example.org/piwik/
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// with your Piwik URL ending with a slash.
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// This URL will never be revealed to visitors or search engines.
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if (! isset($PIWIK_URL)) {
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$PIWIK_URL = 'http://your-piwik-domain.example.org/piwik/';
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}
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// Edit the line below, and replace xyz by the token_auth for the user "UserTrackingAPI"
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// which you created when you followed instructions above.
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if (! isset($TOKEN_AUTH)) {
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$TOKEN_AUTH = 'xyz';
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}
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// Maximum time, in seconds, to wait for the Piwik server to return the 1*1 GIF
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if (! isset($timeout)) {
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$timeout = 5;
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}
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function sendHeader($header, $replace = true)
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{
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headers_sent() || header($header, $replace);
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}
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function arrayValue($array, $key, $value = null)
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{
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if (!empty($array[$key])) {
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$value = $array[$key];
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}
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return $value;
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}
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function getContents($useCurl, $url, $options = false)
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{
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if (!$useCurl && ini_get('allow_url_fopen')) {
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$ctx = ($options?stream_context_create($options):NULL);
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return file_get_contents($url, 0, $ctx);
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} elseif ($useCurl && function_exists('curl_version'))
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return piwikFileGetContentsCurl($url, $options);
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else return 'Neither url_fopen nor cURL is available. Please enable at least one of them.';
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}
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function piwikFileGetContentsCurl($url, $options)
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{
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_HEADER, 0);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_USERAGENT, $options['http']['user_agent']);
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curl_setopt($ch, CURLOPT_HTTPHEADER, array($options['http']['header']));
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curl_setopt($ch, CURLOPT_TIMEOUT, $options['http']['timeout']);
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curl_setopt($ch, CURLOPT_URL, $url);
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$data = curl_exec($ch);
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curl_close($ch);
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return $data;
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}
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// DO NOT MODIFY BELOW
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// ---------------------------
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// 1) PIWIK.JS PROXY: No _GET parameter, we serve the JS file
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if (empty($_GET)) {
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$modifiedSince = false;
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if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
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$modifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
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// strip any trailing data appended to header
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if (false !== ($semicolon = strpos($modifiedSince, ';'))) {
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$modifiedSince = substr($modifiedSince, 0, $semicolon);
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}
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$modifiedSince = strtotime($modifiedSince);
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}
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// Re-download the piwik.js once a day maximum
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$lastModified = time() - 86400;
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// set HTTP response headers
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sendHeader('Vary: Accept-Encoding');
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// Returns 304 if not modified since
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if (!empty($modifiedSince) && $modifiedSince > $lastModified) {
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sendHeader(sprintf("%s 304 Not Modified", $_SERVER['SERVER_PROTOCOL']));
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} else {
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sendHeader('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
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sendHeader('Content-Type: application/javascript; charset=UTF-8');
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if ($piwikJs = getContents($useCurl, $PIWIK_URL . 'piwik.js')) {
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echo $piwikJs;
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} else {
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sendHeader($_SERVER['SERVER_PROTOCOL'] . '505 Internal server error');
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}
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}
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exit;
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}
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@ini_set('magic_quotes_runtime', 0);
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// 2) PIWIK.PHP PROXY: GET parameters found, this is a tracking request, we redirect it to Piwik
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$url = sprintf("%spiwik.php?cip=%s&token_auth=%s&", $PIWIK_URL, getVisitIp(), $TOKEN_AUTH);
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foreach ($_GET as $key => $value) {
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$url .= urlencode($key ). '=' . urlencode($value) . '&';
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}
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sendHeader("Content-Type: image/gif");
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$stream_options = array('http' => array(
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'user_agent' => arrayValue($_SERVER, 'HTTP_USER_AGENT', ''),
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'header' => sprintf("Accept-Language: %s\r\n", str_replace(array("\n", "\t", "\r"), "", arrayValue($_SERVER, 'HTTP_ACCEPT_LANGUAGE', ''))),
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'timeout' => $timeout
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));
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if (version_compare(PHP_VERSION, '5.3.0', '<')) {
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// PHP 5.2 breaks with the new 204 status code so we force returning the image every time
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echo getContents($useCurl, $url . '&send_image=1', $stream_options);
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} else {
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// PHP 5.3 and above
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$content = getContents($useCurl, $url, $stream_options);
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// Forward the HTTP response code
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if (!headers_sent() && isset($http_response_header[0])) {
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header($http_response_header[0]);
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}
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echo $content;
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}
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function getVisitIp()
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{
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$matchIp = '/^([0-9]{1,3}\.){3}[0-9]{1,3}$/';
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$ipKeys = array(
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'HTTP_X_FORWARDED_FOR',
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'HTTP_CLIENT_IP',
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'HTTP_CF_CONNECTING_IP',
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);
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foreach($ipKeys as $ipKey) {
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if (isset($_SERVER[$ipKey])
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&& preg_match($matchIp, $_SERVER[$ipKey])) {
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return $_SERVER[$ipKey];
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}
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}
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return arrayValue($_SERVER, 'REMOTE_ADDR');
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}
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