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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Tracker;
use Piwik\Cache;
use Piwik\CacheId;
use Piwik\Tracker\Cache as TrackerCache;
use Piwik\Common;
use Piwik\Config;
use Piwik\Piwik;
use Piwik\Plugins\SitesManager\API as APISitesManager;
use Piwik\UrlHelper;
class PageUrl
{
/**
* Map URL prefixes to integers.
* @see self::normalizeUrl(), self::reconstructNormalizedUrl()
*/
public static $urlPrefixMap = array('http://www.' => 1, 'http://' => 0, 'https://www.' => 3, 'https://' => 2);
/**
* Given the Input URL, will exclude all query parameters set for this site
*
* @static
* @param string $originalUrl
* @param $idSite
* @param array $additionalParametersToExclude
* @return bool|string Returned URL is HTML entities decoded
*/
public static function excludeQueryParametersFromUrl($originalUrl, $idSite, $additionalParametersToExclude = [])
{
$originalUrl = self::cleanupUrl($originalUrl);
$parsedUrl = @parse_url($originalUrl);
$parsedUrl = self::cleanupHostAndHashTag($parsedUrl, $idSite);
$parametersToExclude = array_merge(self::getQueryParametersToExclude($idSite), $additionalParametersToExclude);
if (empty($parsedUrl['query'])) {
if (empty($parsedUrl['fragment'])) {
return UrlHelper::getParseUrlReverse($parsedUrl);
}
// Exclude from the hash tag as well
$queryParameters = UrlHelper::getArrayFromQueryString($parsedUrl['fragment']);
$parsedUrl['fragment'] = UrlHelper::getQueryStringWithExcludedParameters($queryParameters, $parametersToExclude);
$url = UrlHelper::getParseUrlReverse($parsedUrl);
return $url;
}
$queryParameters = UrlHelper::getArrayFromQueryString($parsedUrl['query']);
$parsedUrl['query'] = UrlHelper::getQueryStringWithExcludedParameters($queryParameters, $parametersToExclude);
$url = UrlHelper::getParseUrlReverse($parsedUrl);
return $url;
}
/**
* Returns the array of parameters names that must be excluded from the Query String in all tracked URLs
* @static
* @param $idSite
* @return array
*/
public static function getQueryParametersToExclude($idSite)
{
$campaignTrackingParameters = Common::getCampaignParameters();
$campaignTrackingParameters = array_merge(
$campaignTrackingParameters[0],
// campaign name parameters
$campaignTrackingParameters[1]
);
$website = TrackerCache::getCacheWebsiteAttributes($idSite);
$excludedParameters = self::getExcludedParametersFromWebsite($website);
$parametersToExclude = array_merge(['ignore_referrer', 'ignore_referer'], $excludedParameters, self::getUrlParameterNamesToExcludeFromUrl(), $campaignTrackingParameters);
/**
* Triggered before setting the action url in Piwik\Tracker\Action so plugins can register
* parameters to be excluded from the tracking URL (e.g. campaign parameters).
*
* @param array &$parametersToExclude An array of parameters to exclude from the tracking url.
*/
Piwik::postEvent('Tracker.PageUrl.getQueryParametersToExclude', array(&$parametersToExclude));
if (!empty($parametersToExclude)) {
Common::printDebug('Excluding parameters "' . implode(',', $parametersToExclude) . '" from URL');
}
$parametersToExclude = array_map('strtolower', $parametersToExclude);
return $parametersToExclude;
}
/**
* Returns the list of URL query parameters that should be removed from the tracked URL query string.
*
* @return array
*/
protected static function getUrlParameterNamesToExcludeFromUrl()
{
$paramsToExclude = Config::getInstance()->Tracker['url_query_parameter_to_exclude_from_url'];
$paramsToExclude = explode(",", $paramsToExclude);
$paramsToExclude = array_map('trim', $paramsToExclude);
return $paramsToExclude;
}
/**
* Returns true if URL fragments should be removed for a specific site,
* false if otherwise.
*
* This function uses the Tracker cache and not the MySQL database.
*
* @param $idSite int The ID of the site to check for.
* @return bool
*/
public static function shouldRemoveURLFragmentFor($idSite)
{
$websiteAttributes = TrackerCache::getCacheWebsiteAttributes($idSite);
return empty($websiteAttributes['keep_url_fragment']);
}
/**
* Cleans and/or removes the URL fragment of a URL.
*
* @param $urlFragment string The URL fragment to process.
* @param $idSite int|bool If not false, this function will check if URL fragments
* should be removed for the site w/ this ID and if so,
* the returned processed fragment will be empty.
*
* @return string The processed URL fragment.
*/
public static function processUrlFragment($urlFragment, $idSite = false)
{
// if we should discard the url fragment for this site, return an empty string as
// the processed url fragment
if ($idSite !== false && \Piwik\Tracker\PageUrl::shouldRemoveURLFragmentFor($idSite)) {
return '';
} else {
// Remove trailing Hash tag in ?query#hash#
if (substr($urlFragment, -1) == '#') {
$urlFragment = substr($urlFragment, 0, strlen($urlFragment) - 1);
}
return $urlFragment;
}
}
/**
* Will cleanup the hostname (some browser do not strolower the hostname),
* and deal ith the hash tag on incoming URLs based on website setting.
*
* @param $parsedUrl
* @param $idSite int|bool The site ID of the current visit. This parameter is
* only used by the tracker to see if we should remove
* the URL fragment for this site.
* @return array
*/
protected static function cleanupHostAndHashTag($parsedUrl, $idSite = false)
{
if (empty($parsedUrl)) {
return $parsedUrl;
}
if (!empty($parsedUrl['host'])) {
$parsedUrl['host'] = mb_strtolower($parsedUrl['host']);
}
if (!empty($parsedUrl['fragment'])) {
$parsedUrl['fragment'] = \Piwik\Tracker\PageUrl::processUrlFragment($parsedUrl['fragment'], $idSite);
}
return $parsedUrl;
}
/**
* Converts Matrix URL format
* from http://example.org/thing;paramA=1;paramB=6542
* to http://example.org/thing?paramA=1¶mB=6542
*
* @param string $originalUrl
* @return string
*/
public static function convertMatrixUrl($originalUrl)
{
$posFirstSemiColon = strpos($originalUrl, ";");
if (false === $posFirstSemiColon) {
return $originalUrl;
}
$posQuestionMark = strpos($originalUrl, "?");
$replace = false === $posQuestionMark;
if ($posQuestionMark > $posFirstSemiColon) {
$originalUrl = substr_replace($originalUrl, ";", $posQuestionMark, 1);
$replace = true;
}
if ($replace) {
$originalUrl = substr_replace($originalUrl, "?", strpos($originalUrl, ";"), 1);
$originalUrl = str_replace(";", "&", $originalUrl);
}
return $originalUrl;
}
/**
* Clean up string contents (filter, truncate, ...)
*
* @param string $string Dirty string
* @return string
*/
public static function cleanupString($string)
{
$string = trim($string);
$string = str_replace(array("\n", "\r", "\x00"), '', $string);
$limit = Config::getInstance()->Tracker['page_maximum_length'];
$clean = substr($string, 0, $limit);
return $clean;
}
protected static function reencodeParameterValue($value, $encoding)
{
if (is_string($value)) {
$decoded = urldecode($value);
try {
if (function_exists('mb_check_encoding') && @mb_check_encoding($decoded, $encoding)) {
$value = urlencode(mb_convert_encoding($decoded, 'UTF-8', $encoding));
}
} catch (\Error $e) {
// mb_check_encoding might throw an ValueError on PHP 8 if the given encoding does not exist
// we can't simply catch ValueError as it was introduced in PHP 8
}
}
return $value;
}
protected static function reencodeParametersArray($queryParameters, $encoding)
{
foreach ($queryParameters as &$value) {
if (is_array($value)) {
$value = self::reencodeParametersArray($value, $encoding);
} else {
$value = \Piwik\Tracker\PageUrl::reencodeParameterValue($value, $encoding);
}
}
return $queryParameters;
}
/**
* Checks if query parameters are of a non-UTF-8 encoding and converts the values
* from the specified encoding to UTF-8.
* This method is used to workaround browser/webapp bugs (see #3450). When
* browsers fail to encode query parameters in UTF-8, the tracker will send the
* charset of the page viewed and we can sometimes work around invalid data
* being stored.
*
* @param array $queryParameters Name/value mapping of query parameters.
* @param bool|string $encoding of the HTML page the URL is for. Used to workaround
* browser bugs & mis-coded webapps. See #3450.
*
* @return array
*/
public static function reencodeParameters(&$queryParameters, $encoding = false)
{
if (function_exists('mb_check_encoding')) {
// if query params are encoded w/ non-utf8 characters (due to browser bug or whatever),
// encode to UTF-8.
if (is_string($encoding) && strtolower($encoding) !== 'utf-8') {
Common::printDebug("Encoding page URL query parameters to {$encoding}.");
$queryParameters = \Piwik\Tracker\PageUrl::reencodeParametersArray($queryParameters, $encoding);
}
} else {
Common::printDebug("Page charset supplied in tracking request, but mbstring extension is not available.");
}
return $queryParameters;
}
public static function cleanupUrl($url)
{
$url = Common::unsanitizeInputValue($url);
$url = \Piwik\Tracker\PageUrl::cleanupString($url);
$url = \Piwik\Tracker\PageUrl::convertMatrixUrl($url);
return $url;
}
/**
* Build the full URL from the prefix ID and the rest.
*
* @param string $url
* @param integer $prefixId
* @return string
*/
public static function reconstructNormalizedUrl($url, $prefixId)
{
$map = array_flip(self::$urlPrefixMap);
if ($prefixId !== null && isset($map[$prefixId])) {
$fullUrl = $map[$prefixId] . $url;
} else {
$fullUrl = $url;
}
// Clean up host & hash tags, for URLs
$parsedUrl = @parse_url($fullUrl);
$parsedUrl = \Piwik\Tracker\PageUrl::cleanupHostAndHashTag($parsedUrl);
$url = UrlHelper::getParseUrlReverse($parsedUrl);
if (!empty($url)) {
return $url;
}
return $fullUrl;
}
/**
* Returns if the given host is also configured as https in page urls of given site
*
* @param $idSite
* @param $host
* @return false|mixed
* @throws \Exception
*/
public static function shouldUseHttpsHost($idSite, $host)
{
$cache = Cache::getTransientCache();
$cacheKeySiteUrls = CacheId::siteAware('siteurls', [$idSite]);
$cacheKeyHttpsForHost = CacheId::siteAware(sprintf('shouldusehttps-%s', $host), [$idSite]);
$siteUrlCache = $cache->fetch($cacheKeySiteUrls);
if (empty($siteUrlCache)) {
$siteUrlCache = APISitesManager::getInstance()->getSiteUrlsFromId($idSite);
$cache->save($cacheKeySiteUrls, $siteUrlCache);
}
if (!$cache->contains($cacheKeyHttpsForHost)) {
$hostSiteCache = false;
foreach ($siteUrlCache as $siteUrl) {
if (strpos(mb_strtolower($siteUrl), mb_strtolower('https://' . $host)) === 0) {
$hostSiteCache = true;
break;
}
}
$cache->save($cacheKeyHttpsForHost, $hostSiteCache);
}
return $cache->fetch($cacheKeyHttpsForHost);
}
/**
* Extract the prefix from a URL.
* Return the prefix ID and the rest.
*
* @param string $url
* @return array
*/
public static function normalizeUrl($url)
{
foreach (self::$urlPrefixMap as $prefix => $id) {
if (strtolower(substr($url, 0, strlen($prefix))) == $prefix) {
return array('url' => substr($url, strlen($prefix)), 'prefixId' => $id);
}
}
return array('url' => $url, 'prefixId' => null);
}
public static function getUrlIfLookValid($url)
{
$url = \Piwik\Tracker\PageUrl::cleanupString($url);
if (!UrlHelper::isLookLikeUrl($url)) {
Common::printDebug("WARNING: URL looks invalid and is discarded");
return false;
}
return $url;
}
private static function getExcludedParametersFromWebsite($website)
{
if (isset($website['excluded_parameters'])) {
return $website['excluded_parameters'];
}
return array();
}
public static function urldecodeValidUtf8($value)
{
$value = urldecode($value);
if (function_exists('mb_check_encoding') && !@mb_check_encoding($value, 'utf-8')) {
return urlencode($value);
}
return $value;
}
}