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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;
use Piwik\Container\StaticContainer;
use Piwik\Intl\Data\Provider\RegionDataProvider;
/**
* Contains less commonly needed URL helper methods.
*
*/
class UrlHelper
{
private static $validLinkProtocols = ['http', 'https', 'tel', 'sms', 'mailto', 'callto'];
/**
* Checks if a string matches/is equal to one of the patterns/strings.
*
* @static
* @param $test String to test.
* @param $patterns Array of strings or regexs.
*
* @return bool true if $test matches or is equal to one of the regex/string in $patterns, false otherwise.
*/
protected static function inArrayMatchesRegex($test, $patterns) : bool
{
foreach ($patterns as $val) {
if (@preg_match($val, null) === false) {
if (strcasecmp($val, $test) === 0) {
return true;
}
} else {
if (preg_match($val, $test) === 1) {
return true;
}
}
}
return false;
}
/**
* Converts an array of query parameter name/value mappings into a query string.
* Parameters that are in `$parametersToExclude` will not appear in the result.
*
* @static
* @param $queryParameters Array of query parameters, eg, `array('site' => '0', 'date' => '2012-01-01')`.
* @param $parametersToExclude Array of query parameter names that shouldn't be
* in the result query string, eg, `array('date', 'period')`.
* @return string A query string, eg, `"?site=0"`.
* @api
*/
public static function getQueryStringWithExcludedParameters($queryParameters, $parametersToExclude)
{
$validQuery = '';
$separator = '&';
foreach ($queryParameters as $name => $value) {
// decode encoded square brackets
$name = str_replace(array('%5B', '%5D'), array('[', ']'), $name);
if (!self::inArrayMatchesRegex(strtolower($name), $parametersToExclude)) {
if (is_array($value)) {
foreach ($value as $param) {
if ($param === false) {
$validQuery .= $name . '[]' . $separator;
} else {
$validQuery .= $name . '[]=' . $param . $separator;
}
}
} elseif ($value === false) {
$validQuery .= $name . $separator;
} else {
$validQuery .= $name . '=' . $value . $separator;
}
}
}
$validQuery = substr($validQuery, 0, -strlen($separator));
return $validQuery;
}
/**
* Reduce URL to more minimal form. 2 letter country codes are
* replaced by '{}', while other parts are simply removed.
*
* Examples:
* www.example.com -> example.com
* search.example.com -> example.com
* m.example.com -> example.com
* de.example.com -> {}.example.com
* example.de -> example.{}
* example.co.uk -> example.{}
*
* @param string $url
* @return string
*/
public static function getLossyUrl($url)
{
static $countries;
if (!isset($countries)) {
/** @var RegionDataProvider $regionDataProvider */
$regionDataProvider = StaticContainer::get('Piwik\\Intl\\Data\\Provider\\RegionDataProvider');
$countries = implode('|', array_keys($regionDataProvider->getCountryList(true)));
}
return preg_replace(array('/^(w+[0-9]*|search)\\./', '/(^|\\.)m\\./', '/(\\.(com|org|net|co|it|edu))?\\.(' . $countries . ')(\\/|$)/', '/(^|\\.)(' . $countries . ')\\./'), array('', '$1', '.{}$4', '$1{}.'), $url);
}
/**
* Returns true if the string passed may be a URL ie. it starts with protocol://.
* We don't need a precise test here because the value comes from the website
* tracked source code and the URLs may look very strange.
*
* @api
* @param string $url
* @return bool
*/
public static function isLookLikeUrl($url)
{
return $url && preg_match('~^(([[:alpha:]][[:alnum:]+.-]*)?:)?//(.*)$~D', $url, $matches) !== 0 && strlen($matches[3]) > 0 && !preg_match('/^(javascript:|vbscript:|data:)/i', $matches[1]);
}
public static function isLookLikeSafeUrl($url)
{
if (preg_match('/[\\x00-\\x1F\\x7F]/', $url)) {
return false;
}
if (strpos($url, ':') === false) {
return true;
}
$protocol = explode(':', $url, 2)[0];
return preg_match('/^(' . implode('|', self::$validLinkProtocols) . ')$/i', $protocol);
}
/**
* Returns a URL created from the result of the [parse_url](http://php.net/manual/en/function.parse-url.php)
* function.
*
* Copied from the PHP comments at [http://php.net/parse_url](http://php.net/parse_url).
*
* @param array $parsed Result of [parse_url](http://php.net/manual/en/function.parse-url.php).
* @return false|string The URL or `false` if `$parsed` isn't an array.
* @api
*/
public static function getParseUrlReverse($parsed)
{
if (!is_array($parsed)) {
return false;
}
$uri = !empty($parsed['scheme']) ? $parsed['scheme'] . ':' . (!strcasecmp($parsed['scheme'], 'mailto') ? '' : '//') : '';
$uri .= !empty($parsed['user']) ? $parsed['user'] . (!empty($parsed['pass']) ? ':' . $parsed['pass'] : '') . '@' : '';
$uri .= !empty($parsed['host']) ? $parsed['host'] : '';
$uri .= !empty($parsed['port']) ? ':' . $parsed['port'] : '';
if (!empty($parsed['path'])) {
$uri .= !strncmp($parsed['path'], '/', 1) ? $parsed['path'] : (!empty($uri) ? '/' : '') . $parsed['path'];
}
$uri .= !empty($parsed['query']) ? '?' . $parsed['query'] : '';
$uri .= !empty($parsed['fragment']) ? '#' . $parsed['fragment'] : '';
return $uri;
}
/**
* Returns a URL query string as an array.
*
* @param string $urlQuery The query string, eg, `'?param1=value1¶m2=value2'`.
* @return array eg, `array('param1' => 'value1', 'param2' => 'value2')`
* @api
*/
public static function getArrayFromQueryString($urlQuery)
{
if (empty($urlQuery)) {
return array();
}
// TODO: this method should not use a cache. callers should instead have their own cache, configured through DI.
// one undesirable side effect of using a cache here, is that this method can now init the StaticContainer, which makes setting
// test environment for RequestCommand more complicated.
$cache = \Piwik\Cache::getTransientCache();
$cacheKey = 'arrayFromQuery' . $urlQuery;
if ($cache->contains($cacheKey)) {
return $cache->fetch($cacheKey);
}
if ($urlQuery[0] == '?') {
$urlQuery = substr($urlQuery, 1);
}
$separator = '&';
$urlQuery = $separator . $urlQuery;
// $urlQuery = str_replace(array('%20'), ' ', $urlQuery);
$referrerQuery = trim($urlQuery);
$values = explode($separator, $referrerQuery);
$nameToValue = array();
foreach ($values as $value) {
$pos = strpos($value, '=');
if ($pos !== false) {
$name = substr($value, 0, $pos);
$value = substr($value, $pos + 1);
if ($value === false) {
$value = '';
}
} else {
$name = $value;
$value = false;
}
if (!empty($name)) {
$name = \Piwik\Common::sanitizeInputValue($name);
}
if (!empty($value)) {
$value = \Piwik\Common::sanitizeInputValue($value);
}
// if array without indexes
$count = 0;
$tmp = preg_replace('/(\\[|%5b)(]|%5d)$/i', '', $name, -1, $count);
if (!empty($tmp) && $count) {
$name = $tmp;
if (isset($nameToValue[$name]) == false || is_array($nameToValue[$name]) == false) {
$nameToValue[$name] = array();
}
array_push($nameToValue[$name], $value);
} elseif (!empty($name)) {
$nameToValue[$name] = $value;
}
}
$cache->save($cacheKey, $nameToValue);
return $nameToValue;
}
/**
* Returns the value of a single query parameter from the supplied query string.
*
* @param string $urlQuery The query string.
* @param string $parameter The query parameter name to return.
* @return string|null Parameter value if found (can be the empty string!), null if not found.
* @api
*/
public static function getParameterFromQueryString($urlQuery, $parameter)
{
$nameToValue = self::getArrayFromQueryString($urlQuery);
if (isset($nameToValue[$parameter])) {
return $nameToValue[$parameter];
}
return null;
}
/**
* Returns the path and query string of a URL.
*
* @param string $url The URL.
* @param array $additionalParamsToAdd If not empty the given parameters will be added to the query.
* @param bool $preserveAnchor If true then do not remove any #anchor from the url, default false
* @return string eg, `/test/index.php?module=CoreHome` if `$url` is `http://piwik.org/test/index.php?module=CoreHome`.
* @api
*/
public static function getPathAndQueryFromUrl($url, array $additionalParamsToAdd = [], bool $preserveAnchor = false)
{
$parsedUrl = parse_url($url);
// If an anchor is included in the URL parse_url() will not split the anchor and query, so we do that there
if (isset($parsedUrl['fragment']) && strpos($parsedUrl['fragment'], '?') !== false) {
$parsedUrl['query'] = substr($parsedUrl['fragment'], strpos($parsedUrl['fragment'], '?') + 1);
$parsedUrl['fragment'] = substr($parsedUrl['fragment'], 0, strpos($parsedUrl['fragment'], '?'));
}
$result = '';
if (isset($parsedUrl['path'])) {
if (substr($parsedUrl['path'], 0, 1) == '/') {
$parsedUrl['path'] = substr($parsedUrl['path'], 1);
}
$result .= $parsedUrl['path'];
}
if ($preserveAnchor && isset($parsedUrl['fragment'])) {
$result .= '#' . $parsedUrl['fragment'];
}
if (isset($parsedUrl['query']) || count($additionalParamsToAdd)) {
$query = isset($parsedUrl['query']) ? $parsedUrl['query'] : '';
$query = self::addAdditionalParameters($query, $additionalParamsToAdd);
$result .= '?' . $query;
}
return $result;
}
/**
* Returns the query part from any valid url and adds additional parameters to the query part if needed.
*
* @param string $url Any url eg `"http://example.com/piwik/?foo=bar"`
* @param array $additionalParamsToAdd If not empty the given parameters will be added to the query.
*
* @return string eg. `"foo=bar&foo2=bar2"`
* @api
*/
public static function getQueryFromUrl($url, array $additionalParamsToAdd = [])
{
$url = @parse_url($url);
$query = '';
if (!empty($url['query'])) {
$query .= $url['query'];
}
$query = self::addAdditionalParameters($query, $additionalParamsToAdd);
return $query;
}
/**
* Add an array of additional parameters to a query string
*
* @param string $query
* @param array $additionalParamsToAdd
*
* @return string
*/
private static function addAdditionalParameters(string $query, array $additionalParamsToAdd) : string
{
if (!empty($additionalParamsToAdd)) {
if (!empty($query)) {
$query .= '&';
}
$query .= \Piwik\Url::getQueryStringFromParameters($additionalParamsToAdd);
}
return $query;
}
public static function getHostFromUrl($url)
{
if (!\Piwik\UrlHelper::isLookLikeUrl($url)) {
$url = "http://" . $url;
}
return parse_url($url, PHP_URL_HOST);
}
}