[GitHub/WoltLab/WCF.git] / wcfsetup / install / files / lib / util / UserUtil.class.php

<?php
namespace wcf\util;
use wcf\system\WCF;

/**
 * Contains user-related functions.
 * 
 * @author	Marcel Werk
 * @copyright	2001-2018 WoltLab GmbH
 * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
 * @package	WoltLabSuite\Core\Util
 */
final class UserUtil {
	/**
	 * Returns true if the given name is a valid username.
	 * 
	 * @param	string		$name
	 * @return	boolean
	 */
	public static function isValidUsername($name) {
		// minimum length is 3 characters, maximum length is 100 characters
		if (mb_strlen($name) < 3 || mb_strlen($name) > 100) {
			return false;
		}
		
		// check illegal characters
		if (!preg_match('!^[^,\n]+$!', $name)) {
			return false;
		}
		// check long words
		$words = preg_split('!\s+!', $name, -1, PREG_SPLIT_NO_EMPTY);
		foreach ($words as $word) {
			if (mb_strlen($word) > 20) {
				return false;
			}
		}
		// username must not be a valid e-mail
		if (self::isValidEmail($name)) {
			return false;
		}
		
		return true;
	}
	
	/**
	 * Returns true if the given username is available.
	 * 
	 * @param	string		$name
	 * @return	boolean
	 */
	public static function isAvailableUsername($name) {
		$sql = "SELECT	COUNT(username)
			FROM	wcf".WCF_N."_user
			WHERE	username = ?";
		$statement = WCF::getDB()->prepareStatement($sql);
		$statement->execute([$name]);
		
		return $statement->fetchSingleColumn() == 0;
	}
	
	/**
	 * Returns true if the given e-mail is a valid address.
	 * @see	http://www.faqs.org/rfcs/rfc821.html
	 * 
	 * @param	string		$email
	 * @return	boolean
	 */
	public static function isValidEmail($email) {
		if (mb_strlen($email) > 191) {
			return false;
		}
		
		// local-part
		$c = '!#\$%&\'\*\+\-\/0-9=\?a-z\^_`\{\}\|~';
		$string = '['.$c.']*(?:\\\\[\x00-\x7F]['.$c.']*)*';
		$localPart = $string.'(?:\.'.$string.')*';
		
		// domain
		$name = '[a-z0-9](?:[a-z0-9-]*[a-z0-9])?';
		$domain = $name.'(?:\.'.$name.')*\.[a-z]{2,}';
		
		// mailbox
		$mailbox = $localPart.'@'.$domain;
		
		return preg_match('/^'.$mailbox.'$/i', $email);
	}
	
	/**
	 * Returns true if the given email address is available.
	 * 
	 * @param	string		$email
	 * @return	boolean
	 */
	public static function isAvailableEmail($email) {
		$sql = "SELECT	COUNT(email)
			FROM	wcf".WCF_N."_user
			WHERE	email = ?";
		$statement = WCF::getDB()->prepareStatement($sql);
		$statement->execute([$email]);
		
		return $statement->fetchSingleColumn() == 0;
	}
	
	/**
	 * Returns the user agent of the client.
	 * 
	 * @return	string
	 */
	public static function getUserAgent() {
		if (isset($_SERVER['HTTP_USER_AGENT'])) {
			$userAgent = $_SERVER['HTTP_USER_AGENT'];
			if (!StringUtil::isUTF8($userAgent)) {
				$userAgent = StringUtil::convertEncoding('ISO-8859-1', 'UTF-8', $userAgent);
			}
			
			return mb_substr($userAgent, 0, 191);
		}
		return '';
	}
	
	/**
	 * Returns true if the active user uses a mobile browser.
	 * @see	http://detectmobilebrowser.com
	 * 
	 * @return	boolean
	 */
	public static function usesMobileBrowser() {
		$userAgent = self::getUserAgent();
		if (!$userAgent) false;
		
		if (preg_match('/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i', $userAgent)) {
			return true;
		}
		
		if (preg_match('/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i', substr($userAgent, 0, 4))) {
			return true;
		}
		
		return false;
	}
	
	/**
	 * Returns the ipv6 address of the client.
	 * 
	 * @return	string
	 */
	public static function getIpAddress() {
		$REMOTE_ADDR = '';
		if (isset($_SERVER['REMOTE_ADDR'])) $REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];
		
		// darwin fix
		if ($REMOTE_ADDR == '::1' || $REMOTE_ADDR == 'fe80::1') {
			$REMOTE_ADDR = '127.0.0.1';
		}
		
		$REMOTE_ADDR = self::convertIPv4To6($REMOTE_ADDR);
		
		return $REMOTE_ADDR;
	}
	
	/**
	 * Converts given ipv4 to ipv6.
	 * 
	 * @param	string		$ip
	 * @return	string
	 */
	public static function convertIPv4To6($ip) {
		// drop Window's scope id (confused PHP)
		$ip = preg_replace('~%[^%]+$~', '', $ip);
		
		if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) !== false) {
			// given ip is already ipv6
			return $ip;
		}
		
		if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false) {
			// invalid ip given
			return '';
		}
		
		$ipArray = array_pad(explode('.', $ip), 4, 0);
		$part7 = base_convert(($ipArray[0] * 256) + $ipArray[1], 10, 16);
		$part8 = base_convert(($ipArray[2] * 256) + $ipArray[3], 10, 16);
		
		return '::ffff:'.$part7.':'.$part8;
	}
	
	/**
	 * Converts IPv6 embedded IPv4 address into IPv4 or returns input if true IPv6.
	 * 
	 * @param	string		$ip
	 * @return	string
	 */
	public static function convertIPv6To4($ip) {
		// validate if given IP is a proper IPv6 address
		if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
			// validate if given IP is a proper IPv4 address
			if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false) {
				// ip address is invalid
				return '';
			}
			
			return $ip;
		}
		
		// check if ip is a masked IPv4 address
		if (substr($ip, 0, 7) == '::ffff:') {
			$ip = substr($ip, 7);
			if (preg_match('~^([a-f0-9]{1,4}):([a-f0-9]{1,4})$~', $ip, $matches)) {
				$ip = [
					base_convert($matches[1], 16, 10),
					base_convert($matches[2], 16, 10)
				];
				
				$ipParts = [];
				$tmp = $ip[0] % 256;
				$ipParts[] = ($ip[0] - $tmp) / 256;
				$ipParts[] = $tmp;
				$tmp = $ip[1] % 256;
				$ipParts[] = ($ip[1] - $tmp) / 256;
				$ipParts[] = $tmp;
				
				return implode('.', $ipParts);
			}
			else {
				return $ip;
			}
		}
		else {
			// given ip is an IPv6 address and cannot be converted
			return $ip;
		}
	}
	
	/**
	 * Returns the request uri of the active request.
	 * 
	 * @return	string
	 */
	public static function getRequestURI() {
		$REQUEST_URI = '';
		
		$appendQueryString = true;
		if (!empty($_SERVER['ORIG_PATH_INFO']) && strpos($_SERVER['ORIG_PATH_INFO'], '.php') !== false) {
			$REQUEST_URI = $_SERVER['ORIG_PATH_INFO'];
		}
		else if (!empty($_SERVER['ORIG_SCRIPT_NAME'])) {
			$REQUEST_URI = $_SERVER['ORIG_SCRIPT_NAME'];
		}
		else if (!empty($_SERVER['SCRIPT_NAME']) && (isset($_SERVER['PATH_INFO']) && !empty($_SERVER['PATH_INFO']))) {
			$REQUEST_URI = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
		}
		else if (isset($_SERVER['REQUEST_URI']) && !empty($_SERVER['REQUEST_URI'])) {
			$REQUEST_URI = $_SERVER['REQUEST_URI'];
			$appendQueryString = false;
		}
		else if (!empty($_SERVER['PHP_SELF'])) {
			$REQUEST_URI = $_SERVER['PHP_SELF'];
		}
		else if (!empty($_SERVER['PATH_INFO'])) {
			$REQUEST_URI = $_SERVER['PATH_INFO'];
		}
		if ($appendQueryString && !empty($_SERVER['QUERY_STRING'])) {
			$REQUEST_URI .= '?'.$_SERVER['QUERY_STRING'];
		}
		
		// fix encoding
		if (!StringUtil::isUTF8($REQUEST_URI)) {
			$REQUEST_URI = StringUtil::convertEncoding('ISO-8859-1', 'UTF-8', $REQUEST_URI);
		}
		
		return mb_substr(FileUtil::unifyDirSeparator($REQUEST_URI), 0, 255);
	}
	
	/**
	 * Forbid creation of UserUtil objects.
	 */
	private function __construct() {
		// does nothing
	}
}
Commit	Line	Data
158bd3ca TD	1	<?php
	2	namespace wcf\util;
	3	use wcf\system\WCF;
	4
	5	/**
	6	* Contains user-related functions.
	7	*
9f959ced	8	* @author Marcel Werk
c839bd49	9	* @copyright 2001-2018 WoltLab GmbH
158bd3ca	10	* @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
e71525e4	11	* @package WoltLabSuite\Core\Util
158bd3ca	12	*/
18284789	13	final class UserUtil {
158bd3ca	14	/**
28410a97	15	* Returns true if the given name is a valid username.
158bd3ca	16	*
9f959ced MS	17	* @param string $name
9f959ced MS	18	* @return boolean
158bd3ca TD	19	*/
158bd3ca TD	20	public static function isValidUsername($name) {
f5ddfc28 S	21	// minimum length is 3 characters, maximum length is 100 characters
f5ddfc28 S	22	if (mb_strlen($name) < 3 \|\| mb_strlen($name) > 100) {
0d0de342 TD	23	return false;
	24	}
	25
158bd3ca TD	26	// check illegal characters
	27	if (!preg_match('!^[^,\n]+$!', $name)) {
	28	return false;
	29	}
	30	// check long words
	31	$words = preg_split('!\s+!', $name, -1, PREG_SPLIT_NO_EMPTY);
	32	foreach ($words as $word) {
838e315b	33	if (mb_strlen($word) > 20) {
158bd3ca TD	34	return false;
	35	}
	36	}
d3d127e4 MW	37	// username must not be a valid e-mail
	38	if (self::isValidEmail($name)) {
	39	return false;
	40	}
	41
158bd3ca TD	42	return true;
	43	}
	44
	45	/**
28410a97	46	* Returns true if the given username is available.
158bd3ca	47	*
9f959ced MS	48	* @param string $name
9f959ced MS	49	* @return boolean
158bd3ca TD	50	*/
158bd3ca TD	51	public static function isAvailableUsername($name) {
5c6ddd85	52	$sql = "SELECT COUNT(username)
39bea7dd MS	53	FROM wcf".WCF_N."_user
39bea7dd MS	54	WHERE username = ?";
158bd3ca	55	$statement = WCF::getDB()->prepareStatement($sql);
058cbd6a	56	$statement->execute([$name]);
5c6ddd85 MS	57
5c6ddd85 MS	58	return $statement->fetchSingleColumn() == 0;
158bd3ca	59	}
9f959ced	60
158bd3ca	61	/**
28410a97	62	* Returns true if the given e-mail is a valid address.
0c166126	63	* @see http://www.faqs.org/rfcs/rfc821.html
158bd3ca TD	64	*
158bd3ca TD	65	* @param string $email
9f959ced	66	* @return boolean
158bd3ca TD	67	*/
158bd3ca TD	68	public static function isValidEmail($email) {
ae2dd1d2 S	69	if (mb_strlen($email) > 191) {
	70	return false;
	71	}
	72
158bd3ca TD	73	// local-part
	74	$c = '!#\$%&\'\*\+\-\/0-9=\?a-z\^_`\{\}\\|~';
	75	$string = '['.$c.'](?:\\\\[\x00-\x7F]['.$c.'])*';
	76	$localPart = $string.'(?:\.'.$string.')*';
	77
	78	// domain
	79	$name = '[a-z0-9](?:[a-z0-9-]*[a-z0-9])?';
	80	$domain = $name.'(?:\.'.$name.')*\.[a-z]{2,}';
	81
	82	// mailbox
	83	$mailbox = $localPart.'@'.$domain;
	84
	85	return preg_match('/^'.$mailbox.'$/i', $email);
	86	}
	87
	88	/**
28410a97	89	* Returns true if the given email address is available.
158bd3ca	90	*
9f959ced MS	91	* @param string $email
9f959ced MS	92	* @return boolean
158bd3ca TD	93	*/
158bd3ca TD	94	public static function isAvailableEmail($email) {
5c6ddd85	95	$sql = "SELECT COUNT(email)
39bea7dd MS	96	FROM wcf".WCF_N."_user
39bea7dd MS	97	WHERE email = ?";
158bd3ca	98	$statement = WCF::getDB()->prepareStatement($sql);
058cbd6a	99	$statement->execute([$email]);
5c6ddd85 MS	100
5c6ddd85 MS	101	return $statement->fetchSingleColumn() == 0;
158bd3ca TD	102	}
	103
	104	/**
	105	* Returns the user agent of the client.
	106	*
	107	* @return string
	108	*/
	109	public static function getUserAgent() {
bc56f619 MW	110	if (isset($_SERVER['HTTP_USER_AGENT'])) {
bc56f619 MW	111	$userAgent = $_SERVER['HTTP_USER_AGENT'];
a92ec792	112	if (!StringUtil::isUTF8($userAgent)) {
bc56f619 MW	113	$userAgent = StringUtil::convertEncoding('ISO-8859-1', 'UTF-8', $userAgent);
	114	}
	115
a2bdc5f8	116	return mb_substr($userAgent, 0, 191);
bc56f619	117	}
158bd3ca TD	118	return '';
	119	}
	120
3e17a8ab MS	121	/**
	122	* Returns true if the active user uses a mobile browser.
	123	* @see http://detectmobilebrowser.com
	124	*
	125	* @return boolean
	126	*/
	127	public static function usesMobileBrowser() {
	128	$userAgent = self::getUserAgent();
	129	if (!$userAgent) false;
	130
	131	if (preg_match('/(android\|bb\d+\|meego).+mobile\|avantgo\|bada\/\|blackberry\|blazer\|compal\|elaine\|fennec\|hiptop\|iemobile\|ip(hone\|od)\|iris\|kindle\|lge \|maemo\|midp\|mmp\|mobile.+firefox\|netfront\|opera m(ob\|in)i\|palm( os)?\|phone\|p(ixi\|re)\/\|plucker\|pocket\|psp\|series(4\|6)0\|symbian\|treo\|up\.(browser\|link)\|vodafone\|wap\|windows (ce\|phone)\|xda\|xiino/i', $userAgent)) {
	132	return true;
	133	}
	134
3d802a67	135	if (preg_match('/1207\|6310\|6590\|3gso\|4thp\|50[1-6]i\|770s\|802s\|a wa\|abac\|ac(er\|oo\|s\-)\|ai(ko\|rn)\|al(av\|ca\|co)\|amoi\|an(ex\|ny\|yw)\|aptu\|ar(ch\|go)\|as(te\|us)\|attw\|au(di\|\-m\|r \|s )\|avan\|be(ck\|ll\|nq)\|bi(lb\|rd)\|bl(ac\|az)\|br(e\|v)w\|bumb\|bw\-(n\|u)\|c55\/\|capi\|ccwa\|cdm\-\|cell\|chtm\|cldc\|cmd\-\|co(mp\|nd)\|craw\|da(it\|ll\|ng)\|dbte\|dc\-s\|devi\|dica\|dmob\|do(c\|p)o\|ds(12\|\-d)\|el(49\|ai)\|em(l2\|ul)\|er(ic\|k0)\|esl8\|ez([4-7]0\|os\|wa\|ze)\|fetc\|fly(\-\|_)\|g1 u\|g560\|gene\|gf\-5\|g\-mo\|go(\.w\|od)\|gr(ad\|un)\|haie\|hcit\|hd\-(m\|p\|t)\|hei\-\|hi(pt\|ta)\|hp( i\|ip)\|hs\-c\|ht(c(\-\| \|_\|a\|g\|p\|s\|t)\|tp)\|hu(aw\|tc)\|i\-(20\|go\|ma)\|i230\|iac( \|\-\|\/)\|ibro\|idea\|ig01\|ikom\|im1k\|inno\|ipaq\|iris\|ja(t\|v)a\|jbro\|jemu\|jigs\|kddi\|keji\|kgt( \|\/)\|klon\|kpt \|kwc\-\|kyo(c\|k)\|le(no\|xi)\|lg( g\|\/(k\|l\|u)\|50\|54\|\-[a-w])\|libw\|lynx\|m1\-w\|m3ga\|m50\/\|ma(te\|ui\|xo)\|mc(01\|21\|ca)\|m\-cr\|me(rc\|ri)\|mi(o8\|oa\|ts)\|mmef\|mo(01\|02\|bi\|de\|do\|t(\-\| \|o\|v)\|zz)\|mt(50\|p1\|v )\|mwbp\|mywa\|n10[0-2]\|n20[2-3]\|n30(0\|2)\|n50(0\|2\|5)\|n7(0(0\|1)\|10)\|ne((c\|m)\-\|on\|tf\|wf\|wg\|wt)\|nok(6\|i)\|nzph\|o2im\|op(ti\|wv)\|oran\|owg1\|p800\|pan(a\|d\|t)\|pdxg\|pg(13\|\-([1-8]\|c))\|phil\|pire\|pl(ay\|uc)\|pn\-2\|po(ck\|rt\|se)\|prox\|psio\|pt\-g\|qa\-a\|qc(07\|12\|21\|32\|60\|\-[2-7]\|i\-)\|qtek\|r380\|r600\|raks\|rim9\|ro(ve\|zo)\|s55\/\|sa(ge\|ma\|mm\|ms\|ny\|va)\|sc(01\|h\-\|oo\|p\-)\|sdk\/\|se(c(\-\|0\|1)\|47\|mc\|nd\|ri)\|sgh\-\|shar\|sie(\-\|m)\|sk\-0\|sl(45\|id)\|sm(al\|ar\|b3\|it\|t5)\|so(ft\|ny)\|sp(01\|h\-\|v\-\|v )\|sy(01\|mb)\|t2(18\|50)\|t6(00\|10\|18)\|ta(gt\|lk)\|tcl\-\|tdg\-\|tel(i\|m)\|tim\-\|t\-mo\|to(pl\|sh)\|ts(70\|m\-\|m3\|m5)\|tx\-9\|up(\.b\|g1\|si)\|utst\|v400\|v750\|veri\|vi(rg\|te)\|vk(40\|5[0-3]\|\-v)\|vm40\|voda\|vulc\|vx(52\|53\|60\|61\|70\|80\|81\|83\|85\|98)\|w3c(\-\| )\|webc\|whit\|wi(g \|nc\|nw)\|wmlb\|wonu\|x700\|yas\-\|your\|zeto\|zte\-/i', substr($userAgent, 0, 4))) {
3e17a8ab MS	136	return true;
	137	}
	138
	139	return false;
	140	}
	141
158bd3ca	142	/**
1e5f194f	143	* Returns the ipv6 address of the client.
a17de04e	144	*
9f959ced	145	* @return string
158bd3ca TD	146	*/
	147	public static function getIpAddress() {
	148	$REMOTE_ADDR = '';
	149	if (isset($_SERVER['REMOTE_ADDR'])) $REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];
1e5f194f	150
158bd3ca TD	151	// darwin fix
158bd3ca TD	152	if ($REMOTE_ADDR == '::1' \|\| $REMOTE_ADDR == 'fe80::1') {
92fd47d9	153	$REMOTE_ADDR = '127.0.0.1';
158bd3ca TD	154	}
158bd3ca TD	155
1e5f194f MW	156	$REMOTE_ADDR = self::convertIPv4To6($REMOTE_ADDR);
1e5f194f MW	157
158bd3ca TD	158	return $REMOTE_ADDR;
	159	}
	160
1e5f194f MW	161	/**
	162	* Converts given ipv4 to ipv6.
	163	*
	164	* @param string $ip
	165	* @return string
	166	*/
	167	public static function convertIPv4To6($ip) {
827e7aea AE	168	// drop Window's scope id (confused PHP)
	169	$ip = preg_replace('~%[^%]+$~', '', $ip);
	170
1e5f194f MW	171	if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) !== false) {
	172	// given ip is already ipv6
	173	return $ip;
	174	}
	175
	176	if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false) {
	177	// invalid ip given
	178	return '';
	179	}
	180
	181	$ipArray = array_pad(explode('.', $ip), 4, 0);
	182	$part7 = base_convert(($ipArray[0] * 256) + $ipArray[1], 10, 16);
	183	$part8 = base_convert(($ipArray[2] * 256) + $ipArray[3], 10, 16);
6e1b461c	184
1e5f194f MW	185	return '::ffff:'.$part7.':'.$part8;
	186	}
	187
9e7766a4 AE	188	/**
	189	* Converts IPv6 embedded IPv4 address into IPv4 or returns input if true IPv6.
	190	*
	191	* @param string $ip
	192	* @return string
	193	*/
	194	public static function convertIPv6To4($ip) {
	195	// validate if given IP is a proper IPv6 address
	196	if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
	197	// validate if given IP is a proper IPv4 address
	198	if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false) {
9e7766a4 AE	199	// ip address is invalid
	200	return '';
	201	}
	202
	203	return $ip;
	204	}
	205
	206	// check if ip is a masked IPv4 address
	207	if (substr($ip, 0, 7) == '::ffff:') {
dd2dc943	208	$ip = substr($ip, 7);
6e1b461c	209	if (preg_match('~^([a-f0-9]{1,4}):([a-f0-9]{1,4})$~', $ip, $matches)) {
058cbd6a	210	$ip = [
dd2dc943 AE	211	base_convert($matches[1], 16, 10),
dd2dc943 AE	212	base_convert($matches[2], 16, 10)
058cbd6a	213	];
dd2dc943	214
058cbd6a	215	$ipParts = [];
dd2dc943 AE	216	$tmp = $ip[0] % 256;
	217	$ipParts[] = ($ip[0] - $tmp) / 256;
	218	$ipParts[] = $tmp;
	219	$tmp = $ip[1] % 256;
	220	$ipParts[] = ($ip[1] - $tmp) / 256;
	221	$ipParts[] = $tmp;
	222
	223	return implode('.', $ipParts);
	224	}
	225	else {
	226	return $ip;
	227	}
9e7766a4 AE	228	}
	229	else {
	230	// given ip is an IPv6 address and cannot be converted
	231	return $ip;
	232	}
	233	}
	234
158bd3ca TD	235	/**
	236	* Returns the request uri of the active request.
	237	*
	238	* @return string
	239	*/
	240	public static function getRequestURI() {
	241	$REQUEST_URI = '';
55a685d2	242
bf0436f9	243	$appendQueryString = true;
55a685d2 MW	244	if (!empty($_SERVER['ORIG_PATH_INFO']) && strpos($_SERVER['ORIG_PATH_INFO'], '.php') !== false) {
	245	$REQUEST_URI = $_SERVER['ORIG_PATH_INFO'];
	246	}
	247	else if (!empty($_SERVER['ORIG_SCRIPT_NAME'])) {
	248	$REQUEST_URI = $_SERVER['ORIG_SCRIPT_NAME'];
	249	}
bf0436f9 AE	250	else if (!empty($_SERVER['SCRIPT_NAME']) && (isset($_SERVER['PATH_INFO']) && !empty($_SERVER['PATH_INFO']))) {
	251	$REQUEST_URI = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO'];
	252	}
	253	else if (isset($_SERVER['REQUEST_URI']) && !empty($_SERVER['REQUEST_URI'])) {
	254	$REQUEST_URI = $_SERVER['REQUEST_URI'];
	255	$appendQueryString = false;
55a685d2 MW	256	}
	257	else if (!empty($_SERVER['PHP_SELF'])) {
	258	$REQUEST_URI = $_SERVER['PHP_SELF'];
	259	}
	260	else if (!empty($_SERVER['PATH_INFO'])) {
	261	$REQUEST_URI = $_SERVER['PATH_INFO'];
	262	}
bf0436f9	263	if ($appendQueryString && !empty($_SERVER['QUERY_STRING'])) {
55a685d2	264	$REQUEST_URI .= '?'.$_SERVER['QUERY_STRING'];
158bd3ca	265	}
158bd3ca	266
55a685d2	267	// fix encoding
a92ec792	268	if (!StringUtil::isUTF8($REQUEST_URI)) {
55a685d2 MW	269	$REQUEST_URI = StringUtil::convertEncoding('ISO-8859-1', 'UTF-8', $REQUEST_URI);
55a685d2 MW	270	}
158bd3ca	271
838e315b	272	return mb_substr(FileUtil::unifyDirSeparator($REQUEST_URI), 0, 255);
158bd3ca	273	}
18284789	274
1d5f9363 MS	275	/**
	276	* Forbid creation of UserUtil objects.
	277	*/
	278	private function __construct() {
	279	// does nothing
	280	}
dcb3a44c	281	}