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<?php
/**
* @version $Id: uri.php 21079 2011-04-04 20:54:40Z dextercowley $
* @package Joomla.Framework
* @subpackage Environment
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();
/**
* JURI Class
*
* This class serves two purposes. First to parse a URI and provide a common interface
* for the Joomla Framework to access and manipulate a URI. Second to attain the URI of
* the current executing script from the server regardless of server.
*
* @package Joomla.Framework
* @subpackage Environment
* @since 1.5
*/
class JURI extends JObject
{
/**
* Original URI
*
* @var string
*/
var $_uri = null;
/**
* Protocol
*
* @var string
*/
var $_scheme = null;
/**
* Host
*
* @var string
*/
var $_host = null;
/**
* Port
*
* @var integer
*/
var $_port = null;
/**
* Username
*
* @var string
*/
var $_user = null;
/**
* Password
*
* @var string
*/
var $_pass = null;
/**
* Path
*
* @var string
*/
var $_path = null;
/**
* Query
*
* @var string
*/
var $_query = null;
/**
* Anchor
*
* @var string
*/
var $_fragment = null;
/**
* Query variable hash
*
* @var array
*/
var $_vars = array ();
/**
* Constructor.
* You can pass a URI string to the constructor to initialize a specific URI.
*
* @param string $uri The optional URI string
*/
function __construct($uri = null)
{
if ($uri !== null) {
$this->parse($uri);
}
}
/**
* Returns a reference to a global JURI object, only creating it
* if it doesn't already exist.
*
* This method must be invoked as:
* <pre> $uri =& JURI::getInstance([$uri]);</pre>
*
* @static
* @param string $uri The URI to parse. [optional: if null uses script URI]
* @return JURI The URI object.
* @since 1.5
*/
function &getInstance($uri = 'SERVER')
{
static $instances = array();
if (!isset ($instances[$uri]))
{
// Are we obtaining the URI from the server?
if ($uri == 'SERVER')
{
// Determine if the request was over SSL (HTTPS)
if (isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) != 'off')) {
$https = 's://';
} else {
$https = '://';
}
/*
* Since we are assigning the URI from the server variables, we first need
* to determine if we are running on apache or IIS. If PHP_SELF and REQUEST_URI
* are present, we will assume we are running on apache.
*/
if (!empty ($_SERVER['PHP_SELF']) && !empty ($_SERVER['REQUEST_URI'])) {
/*
* To build the entire URI we need to prepend the protocol, and the http host
* to the URI string.
*/
$theURI = 'http' . $https . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
/*
* Since we do not have REQUEST_URI to work with, we will assume we are
* running on IIS and will therefore need to work some magic with the SCRIPT_NAME and
* QUERY_STRING environment variables.
*/
if (strlen($_SERVER['QUERY_STRING']) && strpos($_SERVER['REQUEST_URI'], $_SERVER['QUERY_STRING']) === false) {
$theURI .= '?'.$_SERVER['QUERY_STRING'];
}
}
else
{
// IIS uses the SCRIPT_NAME variable instead of a REQUEST_URI variable... thanks, MS
$theURI = 'http' . $https . $_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'];
// If the query string exists append it to the URI string
if (isset($_SERVER['QUERY_STRING']) && !empty($_SERVER['QUERY_STRING'])) {
$theURI .= '?' . $_SERVER['QUERY_STRING'];
}
}
// Now we need to clean what we got since we can't trust the server var
// Need to check that the URI is fully decoded in case of multiple-encoded attack vectors.
$halt = 0;
while (true)
{
$last = $theURI;
$theURI = urldecode($theURI);
// Check whether the last decode is equal to the first.
if ($theURI == $last) {
// Break out of the while if the URI is stable.
break;
}
else if (++$halt > 10) {
// Runaway check. URI has been seriously compromised.
jexit();
}
}
$theURI = str_replace('"', '"',$theURI);
$theURI = str_replace('<', '<',$theURI);
$theURI = str_replace('>', '>',$theURI);
$theURI = preg_replace('/eval\((.*)\)/', '', $theURI);
$theURI = preg_replace('/[\\\"\\\'][\\s]*javascript:(.*)[\\\"\\\']/', '""', $theURI);
}
else
{
// We were given a URI
$theURI = $uri;
}
// Create the new JURI instance
$instances[$uri] = new JURI($theURI);
}
return $instances[$uri];
}
/**
* Returns the base URI for the request.
*
* @access public
* @static
* @param boolean $pathonly If false, prepend the scheme, host and port information. Default is false.
* @return string The base URI string
* @since 1.5
*/
function base($pathonly = false)
{
static $base;
// Get the base request path
if (!isset($base))
{
$config =& JFactory::getConfig();
$live_site = $config->getValue('config.live_site');
if(trim($live_site) != '') {
$uri =& JURI::getInstance($live_site);
$base['prefix'] = $uri->toString( array('scheme', 'host', 'port'));
$base['path'] = rtrim($uri->toString( array('path')), '/\\');
if(JPATH_BASE == JPATH_ADMINISTRATOR) {
$base['path'] .= '/administrator';
}
} else {
$uri =& JURI::getInstance();
$base['prefix'] = $uri->toString( array('scheme', 'host', 'port'));
if (strpos(php_sapi_name(), 'cgi') !== false && !empty($_SERVER['REQUEST_URI']) &&
(!ini_get('cgi.fix_pathinfo') || version_compare(PHP_VERSION, '5.2.4', '<'))) {
// CGI on PHP pre-5.2.4 with cgi.fix_pathinfo = 0.
// In pre-rev. 240885 of main_cgi.c, SCRIPT_NAME doesn't conform the PHP spec.,
// therefore we use PHP_SELF instead.
$base['path'] = rtrim(dirname(str_replace(array('"', '<', '>', "'"), '', $_SERVER["PHP_SELF"])), '/\\');
} else {
// Since PHP 5.2.4 we can trust SCRIPT_NAME; it conforms the spec.
$base['path'] = rtrim(dirname($_SERVER['SCRIPT_NAME']), '/\\');
}
}
}
return $pathonly === false ? $base['prefix'].$base['path'].'/' : $base['path'];
}
/**
* Returns the root URI for the request.
*
* @access public
* @static
* @param boolean $pathonly If false, prepend the scheme, host and port information. Default is false.
* @return string The root URI string
* @since 1.5
*/
function root($pathonly = false, $path = null)
{
static $root;
// Get the scheme
if(!isset($root))
{
$uri =& JURI::getInstance(JURI::base());
$root['prefix'] = $uri->toString( array('scheme', 'host', 'port') );
$root['path'] = rtrim($uri->toString( array('path') ), '/\\');
}
// Get the scheme
if(isset($path)) {
$root['path'] = $path;
}
return $pathonly === false ? $root['prefix'].$root['path'].'/' : $root['path'];
}
/**
* Returns the URL for the request, minus the query
*
* @access public
* @return string
* @since 1.5
*/
function current()
{
static $current;
// Get the current URL
if (!isset($current))
{
$uri = & JURI::getInstance();
$current = $uri->toString( array('scheme', 'host', 'port', 'path'));
}
return $current;
}
/**
* Parse a given URI and populate the class fields
*
* @access public
* @param string $uri The URI string to parse
* @return boolean True on success
* @since 1.5
*/
function parse($uri)
{
//Initialize variables
$retval = false;
// Set the original URI to fall back on
$this->_uri = $uri;
/*
* Parse the URI and populate the object fields. If URI is parsed properly,
* set method return value to true.
*/
if ($_parts = $this->_parseURL($uri)) {
$retval = true;
}
//We need to replace & with & for parse_str to work right...
if(isset ($_parts['query']) && strpos($_parts['query'], '&')) {
$_parts['query'] = str_replace('&', '&', $_parts['query']);
}
$this->_scheme = isset ($_parts['scheme']) ? $_parts['scheme'] : null;
$this->_user = isset ($_parts['user']) ? $_parts['user'] : null;
$this->_pass = isset ($_parts['pass']) ? $_parts['pass'] : null;
$this->_host = isset ($_parts['host']) ? $_parts['host'] : null;
$this->_port = isset ($_parts['port']) ? $_parts['port'] : null;
$this->_path = isset ($_parts['path']) ? $_parts['path'] : null;
$this->_query = isset ($_parts['query'])? $_parts['query'] : null;
$this->_fragment = isset ($_parts['fragment']) ? $_parts['fragment'] : null;
//parse the query
if(isset ($_parts['query'])) parse_str($_parts['query'], $this->_vars);
return $retval;
}
/**
* Returns full uri string
*
* @access public
* @param array $parts An array specifying the parts to render
* @return string The rendered URI string
* @since 1.5
*/
function toString($parts = array('scheme', 'user', 'pass', 'host', 'port', 'path', 'query', 'fragment'))
{
$query = $this->getQuery(); //make sure the query is created
$uri = '';
$uri .= in_array('scheme', $parts) ? (!empty($this->_scheme) ? $this->_scheme.'://' : '') : '';
$uri .= in_array('user', $parts) ? $this->_user : '';
$uri .= in_array('pass', $parts) ? (!empty ($this->_pass) ? ':' : '') .$this->_pass. (!empty ($this->_user) ? '@' : '') : '';
$uri .= in_array('host', $parts) ? $this->_host : '';
$uri .= in_array('port', $parts) ? (!empty ($this->_port) ? ':' : '').$this->_port : '';
$uri .= in_array('path', $parts) ? $this->_path : '';
$uri .= in_array('query', $parts) ? (!empty ($query) ? '?'.$query : '') : '';
$uri .= in_array('fragment', $parts)? (!empty ($this->_fragment) ? '#'.$this->_fragment : '') : '';
return $uri;
}
/**
* Adds a query variable and value, replacing the value if it
* already exists and returning the old value.
*
* @access public
* @param string $name Name of the query variable to set
* @param string $value Value of the query variable
* @return string Previous value for the query variable
* @since 1.5
*/
function setVar($name, $value)
{
$tmp = @$this->_vars[$name];
$this->_vars[$name] = $value;
//empty the query
$this->_query = null;
return $tmp;
}
/**
* Returns a query variable by name
*
* @access public
* @param string $name Name of the query variable to get
* @return array Query variables
* @since 1.5
*/
function getVar($name = null, $default=null)
{
if(isset($this->_vars[$name])) {
return $this->_vars[$name];
}
return $default;
}
/**
* Removes an item from the query string variables if it exists
*
* @access public
* @param string $name Name of variable to remove
* @since 1.5
*/
function delVar($name)
{
if (in_array($name, array_keys($this->_vars)))
{
unset ($this->_vars[$name]);
//empty the query
$this->_query = null;
}
}
/**
* Sets the query to a supplied string in format:
* foo=bar&x=y
*
* @access public
* @param mixed (array|string) $query The query string
* @since 1.5
*/
function setQuery($query)
{
if(!is_array($query)) {
if(strpos($query, '&') !== false)
{
$query = str_replace('&','&',$query);
}
parse_str($query, $this->_vars);
}
if(is_array($query)) {
$this->_vars = $query;
}
//empty the query
$this->_query = null;
}
/**
* Returns flat query string
*
* @access public
* @return string Query string
* @since 1.5
*/
function getQuery($toArray = false)
{
if($toArray) {
return $this->_vars;
}
//If the query is empty build it first
if(is_null($this->_query)) {
$this->_query = $this->buildQuery($this->_vars);
}
return $this->_query;
}
/**
* Build a query from a array (reverse of the PHP parse_str())
*
* @access public
* @return string The resulting query string
* @since 1.5
* @see parse_str()
*/
function buildQuery ($params, $akey = null)
{
if ( !is_array($params) || count($params) == 0 ) {
return false;
}
$out = array();
//reset in case we are looping
if( !isset($akey) && !count($out) ) {
unset($out);
$out = array();
}
foreach ( $params as $key => $val )
{
if ( is_array($val) ) {
$out[] = JURI::buildQuery($val,$key);
continue;
}
$thekey = ( !$akey ) ? $key : $akey.'['.$key.']';
$out[] = $thekey."=".urlencode($val);
}
return implode("&",$out);
}
/**
* Get URI scheme (protocol)
* ie. http, https, ftp, etc...
*
* @access public
* @return string The URI scheme
* @since 1.5
*/
function getScheme() {
return $this->_scheme;
}
/**
* Set URI scheme (protocol)
* ie. http, https, ftp, etc...
*
* @access public
* @param string $scheme The URI scheme
* @since 1.5
*/
function setScheme($scheme) {
$this->_scheme = $scheme;
}
/**
* Get URI username
* returns the username, or null if no username was specified
*
* @access public
* @return string The URI username
* @since 1.5
*/
function getUser() {
return $this->_user;
}
/**
* Set URI username
*
* @access public
* @param string $user The URI username
* @since 1.5
*/
function setUser($user) {
$this->_user = $user;
}
/**
* Get URI password
* returns the password, or null if no password was specified
*
* @access public
* @return string The URI password
* @since 1.5
*/
function getPass() {
return $this->_pass;
}
/**
* Set URI password
*
* @access public
* @param string $pass The URI password
* @since 1.5
*/
function setPass($pass) {
$this->_pass = $pass;
}
/**
* Get URI host
* returns the hostname/ip, or null if no hostname/ip was specified
*
* @access public
* @return string The URI host
* @since 1.5
*/
function getHost() {
return $this->_host;
}
/**
* Set URI host
*
* @access public
* @param string $host The URI host
* @since 1.5
*/
function setHost($host) {
$this->_host = $host;
}
/**
* Get URI port
* returns the port number, or null if no port was specified
*
* @access public
* @return int The URI port number
*/
function getPort() {
return (isset ($this->_port)) ? $this->_port : null;
}
/**
* Set URI port
*
* @access public
* @param int $port The URI port number
* @since 1.5
*/
function setPort($port) {
$this->_port = $port;
}
/**
* Gets the URI path string
*
* @access public
* @return string The URI path string
* @since 1.5
*/
function getPath() {
return $this->_path;
}
/**
* Set the URI path string
*
* @access public
* @param string $path The URI path string
* @since 1.5
*/
function setPath($path) {
$this->_path = $this->_cleanPath($path);
}
/**
* Get the URI archor string
* everything after the "#"
*
* @access public
* @return string The URI anchor string
* @since 1.5
*/
function getFragment() {
return $this->_fragment;
}
/**
* Set the URI anchor string
* everything after the "#"
*
* @access public
* @param string $anchor The URI anchor string
* @since 1.5
*/
function setFragment($anchor) {
$this->_fragment = $anchor;
}
/**
* Checks whether the current URI is using HTTPS
*
* @access public
* @return boolean True if using SSL via HTTPS
* @since 1.5
*/
function isSSL() {
return $this->getScheme() == 'https' ? true : false;
}
/**
* Checks if the supplied URL is internal
*
* @access public
* @param string $url The URL to check
* @return boolean True if Internal
* @since 1.5
*/
function isInternal($url) {
$uri =& JURI::getInstance($url);
$base = $uri->toString(array('scheme', 'host', 'port', 'path'));
$host = $uri->toString(array('scheme', 'host', 'port'));
if(stripos($base, JURI::base()) !== 0 && !empty($host)) {
return false;
}
return true;
}
/**
* Resolves //, ../ and ./ from a path and returns
* the result. Eg:
*
* /foo/bar/../boo.php => /foo/boo.php
* /foo/bar/../../boo.php => /boo.php
* /foo/bar/.././/boo.php => /foo/boo.php
*
* @access private
* @param string $uri The URI path to clean
* @return string Cleaned and resolved URI path
* @since 1.5
*/
function _cleanPath($path)
{
$path = explode('/', preg_replace('#(/+)#', '/', $path));
for ($i = 0; $i < count($path); $i ++) {
if ($path[$i] == '.') {
unset ($path[$i]);
$path = array_values($path);
$i --;
}
elseif ($path[$i] == '..' AND ($i > 1 OR ($i == 1 AND $path[0] != ''))) {
unset ($path[$i]);
unset ($path[$i -1]);
$path = array_values($path);
$i -= 2;
}
elseif ($path[$i] == '..' AND $i == 1 AND $path[0] == '') {
unset ($path[$i]);
$path = array_values($path);
$i --;
} else {
continue;
}
}
return implode('/', $path);
}
/**
* Backwards compatibility function for parse_url function
*
* This function solves different bugs in PHP versions lower then
* 4.4, will be deprecated in future versions.
*
* @access private
* @return array Associative array containing the URL parts
* @since 1.5
* @see parse_url()
*/
function _parseURL($uri)
{
$parts = array();
if (version_compare( phpversion(), '4.4' ) < 0)
{
$regex = "<^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?>";
$matches = array();
preg_match($regex, $uri, $matches, PREG_OFFSET_CAPTURE);
$authority = @$matches[4][0];
if (strpos($authority, '@') !== false) {
$authority = explode('@', $authority);
@list($parts['user'], $parts['pass']) = explode(':', $authority[0]);
$authority = $authority[1];
}
if (strpos($authority, ':') !== false) {
$authority = explode(':', $authority);
$parts['host'] = $authority[0];
$parts['port'] = $authority[1];
} else {
$parts['host'] = $authority;
}
$parts['scheme'] = @$matches[2][0];
$parts['path'] = @$matches[5][0];
$parts['query'] = @$matches[7][0];
$parts['fragment'] = @$matches[9][0];
}
else
{
$parts = @parse_url($uri);
}
return $parts;
}
}