-<?php

-/**

-*

-* @package core

-* @version $Id$

-* @copyright (c) 2008 phpBB Group

-* @license http://opensource.org/licenses/gpl-license.php GNU Public License

-*

-*/

-

-/**

-* @ignore

-*/

-if (!defined('IN_PHPBB'))

-{

- exit();

-}

-

-/**

-* Get system/server information variables.

-*

-* @package core

-*/

-class phpbb_system_info extends phpbb_plugin_support implements ArrayAccess

-{

- /**

- * @var array required phpBB objects

- */

- public $phpbb_required = array('config', 'url');

-

- /**

- * @var array Optional phpBB objects

- */

- public $phpbb_optional = array();

-

- /**

- * @var array Array for storing/accessing information

- */

- private $data = array();

-

- /**#@+

- * Part of the ArrayAccess implementation.

- * @access public

- */

- public function offsetSet($offset, $value)

- {

- $this->data[$offset] = $value;

- }

-

- public function offsetExists($offset)

- {

- return isset($this->data[$offset]);

- }

-

- public function offsetUnset($offset)

- {

- unset($this->data[$offset]);

- }

- /**#@-*/

-

- /**

- * Get system information - Part of the ArrayAccess implementation.

- *

- * System information ought to be received from {@link $data phpbb::$user->system[key]}.

- * The key used is mapped to a method with get_ as prefix.

- * For example getting phpbb::$user->system['host'] results in calling the method get_host().

- *

- * @param string $offset The key to get.

- * @return mixed The result

- * @access public

- */

- public function offsetGet($offset)

- {

- if (isset($this->data[$offset]))

- {

- return $this->data[$offset];

- }

-

- $identifier = 'get_' . strtolower($offset);

-

- // Not static, because we are not able to use late static bindings

- $this->data[$offset] = $this->$identifier();

- return $this->data[$offset];

- }

-

- /**

- * Get valid hostname/port. HTTP_HOST is used, SERVER_NAME if HTTP_HOST not present.

- *

- * @return string Host (lowercase, not specialchared)

- * @access protected

- */

- protected function get_host()

- {

- // Get hostname

- $host = (!empty($_SERVER['HTTP_HOST'])) ? $_SERVER['HTTP_HOST'] : ((!empty($_SERVER['SERVER_NAME'])) ? $_SERVER['SERVER_NAME'] : getenv('SERVER_NAME'));

-

- // Should be a string and lowered

- $host = (string) strtolower($host);

-

- // If host is equal the cookie domain or the server name (if config is set), then we assume it is valid

- if ((isset(phpbb::$config['cookie_domain']) && $host === phpbb::$config['cookie_domain']) || (isset(phpbb::$config['server_name']) && $host === phpbb::$config['server_name']))

- {

- return $host;

- }

-

- // Is the host actually a IP? If so, we use the IP... (IPv4)

- if (long2ip(ip2long($host)) === $host)

- {

- return $host;

- }

-

- // Now return the hostname (this also removes any port definition). The http:// is prepended to construct a valid URL, hosts never have a scheme assigned

- $host = @parse_url('http://' . $host, PHP_URL_HOST);

-

- // Remove any portions not removed by parse_url (#)

- $host = str_replace('#', '', $host);

-

- // If, by any means, the host is now empty, we will use a "best approach" way to guess one

- if (empty($host))

- {

- if (!empty(phpbb::$config['server_name']))

- {

- $host = phpbb::$config['server_name'];

- }

- else if (!empty(phpbb::$config['cookie_domain']))

- {

- $host = (strpos(phpbb::$config['cookie_domain'], '.') === 0) ? substr(phpbb::$config['cookie_domain'], 1) : phpbb::$config['cookie_domain'];

- }

- else

- {

- // Set to OS hostname or localhost

- $host = (function_exists('php_uname')) ? strtolower(php_uname('n')) : 'localhost';

- }

- }

-

- // It may be still no valid host, but for sure only a hostname (we may further expand on the cookie domain... if set)

- return $host;

- }

-

- /**

- * Extract current session page, relative from current root path (PHPBB_ROOT_PATH)

- *

- * The array returned consist of the following key/value pairs:

- * page_name: The current basename'd page name, for example: index.php (urlencoded, htmlspecialchared)

- * page_dir: The current directory within the phpBB root, for example: adm

- * query_string: The current query string, for example: i=10&b=2 (the parameter 'sid' is never included)

- * script_path: The script path from the webroot to the current directory, for example: /phpBB3/adm/

- * The script path is always prefixed with / and ends in /. Specialchared, whitespace replaced with %20.

- * root_script_path: The script path from the webroot to the phpBB root, for example: /phpBB3/

- * The root script path is always prefixed with / and ends in /. Specialchared, whitespace replaced with %20.

- * page: Current page from phpBB root, for example: adm/index.php?i=10&b=2

- * forum: Current forum id (determined by {@link request_var() request_var('f', 0)})

- *

- * @return array Array containing page information.

- * @plugin-support return

- * @access protected

- */

- protected function get_page()

- {

- $page_array = array();

-

- // First of all, get the request uri...

- $script_name = (!empty($_SERVER['PHP_SELF'])) ? $_SERVER['PHP_SELF'] : getenv('PHP_SELF');

- $args = (!empty($_SERVER['QUERY_STRING'])) ? explode('&', $_SERVER['QUERY_STRING']) : explode('&', getenv('QUERY_STRING'));

-

- // If we are unable to get the script name we use REQUEST_URI as a failover and note it within the page array for easier support...

- if (!$script_name)

- {

- $script_name = (!empty($_SERVER['REQUEST_URI'])) ? $_SERVER['REQUEST_URI'] : getenv('REQUEST_URI');

- $script_name = (($pos = strpos($script_name, '?')) !== false) ? substr($script_name, 0, $pos) : $script_name;

- $page_array['failover'] = 1;

- }

-

- // Replace backslashes and doubled slashes (could happen on some proxy setups)

- $script_name = str_replace(array('\\', '//'), '/', $script_name);

-

- // Now, remove the sid and let us get a clean query string...

- $use_args = array();

-

- // Since some browser do not encode correctly we need to do this with some "special" characters...

- // " -> %22, ' => %27, < -> %3C, > -> %3E

- $find = array('"', "'", '<', '>');

- $replace = array('%22', '%27', '%3C', '%3E');

-

- foreach ($args as $argument)

- {

- if (strpos($argument, 'sid=') === 0)

- {

- continue;

- }

-

- $use_args[] = str_replace($find, $replace, $argument);

- }

- unset($args);

-

- // The following examples given are for an request uri of {path to the phpbb directory}/adm/index.php?i=10&b=2

-

- // The current query string

- $query_string = trim(implode('&', $use_args));

-

- // basenamed page name (for example: index.php)

- $page_name = basename($script_name);

- $page_name = urlencode(htmlspecialchars($page_name));

-

- // current directory within the phpBB root (for example: adm)

- $root_dirs = explode('/', str_replace('\\', '/', phpbb::$url->realpath(PHPBB_ROOT_PATH)));

- $page_dirs = explode('/', str_replace('\\', '/', phpbb::$url->realpath('./')));

- $intersection = array_intersect_assoc($root_dirs, $page_dirs);

-

- $root_dirs = array_diff_assoc($root_dirs, $intersection);

- $page_dirs = array_diff_assoc($page_dirs, $intersection);

-

- $page_dir = str_repeat('../', sizeof($root_dirs)) . implode('/', $page_dirs);

-

- if ($page_dir && substr($page_dir, -1, 1) == '/')

- {

- $page_dir = substr($page_dir, 0, -1);

- }

-

- // Current page from phpBB root (for example: adm/index.php?i=10&b=2)

- $page = (($page_dir) ? $page_dir . '/' : '') . $page_name . (($query_string) ? "?$query_string" : '');

-

- // The script path from the webroot to the current directory (for example: /phpBB3/adm/) : always prefixed with / and ends in /

- $script_path = trim(str_replace('\\', '/', dirname($script_name)));

-

- // The script path from the webroot to the phpBB root (for example: /phpBB3/)

- $script_dirs = explode('/', $script_path);

- array_splice($script_dirs, -sizeof($page_dirs));

- $root_script_path = implode('/', $script_dirs) . (sizeof($root_dirs) ? '/' . implode('/', $root_dirs) : '');

-

- // We are on the base level (phpBB root == webroot), lets adjust the variables a bit...

- if (!$root_script_path)

- {

- $root_script_path = ($page_dir) ? str_replace($page_dir, '', $script_path) : $script_path;

- }

-

- $script_path .= (substr($script_path, -1, 1) == '/') ? '' : '/';

- $root_script_path .= (substr($root_script_path, -1, 1) == '/') ? '' : '/';

-

- $page_array += array(

- 'page_name' => $page_name,

- 'page_dir' => $page_dir,

-

- 'query_string' => $query_string,

- 'script_path' => str_replace(' ', '%20', htmlspecialchars($script_path)),

- 'root_script_path' => str_replace(' ', '%20', htmlspecialchars($root_script_path)),

-

- 'page' => $page,

- 'forum' => request_var('f', 0),

- );

-

- return ($this->method_inject(__FUNCTION__, 'return')) ? $this->call_inject(__FUNCTION__, array('return', $page_array)) : $page_array;

- }

-

- /**

- * Get user agent string.

- *

- * @return string User agent, determined from $_SERVER['HTTP_USER_AGENT']. Specialchared.

- * @access protected

- */

- protected function get_browser()

- {

- return (!empty($_SERVER['HTTP_USER_AGENT'])) ? htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT']) : '';

- }

-

- /**

- * Get current referer

- *

- * @return string Referer, determined from $_SERVER['HTTP_REFERER']. Specialchared.

- * @access protected

- */

- protected function get_referer()

- {

- return (!empty($_SERVER['HTTP_REFERER'])) ? htmlspecialchars((string) $_SERVER['HTTP_REFERER']) : '';

- }

-

- /**

- * Get server port

- *

- * @return int Sertver port, determined from $_SERVER/$_ENV['SERVER_PORT'].

- * @access protected

- */

- protected function get_port()

- {

- return (!empty($_SERVER['SERVER_PORT'])) ? (int) $_SERVER['SERVER_PORT'] : (int) getenv('SERVER_PORT');

- }

-

- /**

- * Get forwarded-for string.

- * If the forwarded for check is enabled in phpBB the ip's are checked for valid data and invalid data being removed.

- *

- * @return string Forwarded-for string, determined from $_SERVER['HTTP_X_FORWARDED_FOR'].

- * @access protected

- */

- protected function get_forwarded_for()

- {

- $forwarded_for = (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) ? (string) $_SERVER['HTTP_X_FORWARDED_FOR'] : '';

-

- // if the forwarded for header shall be checked we have to validate its contents

- if (phpbb::$config['forwarded_for_check'])

- {

- $forwarded_for = preg_replace('#, +#', ', ', $forwarded_for);

-

- // split the list of IPs

- $ips = explode(', ', $forwarded_for);

- foreach ($ips as $ip)

- {

- // check IPv4 first, the IPv6 is hopefully only going to be used very seldomly

- if (!empty($ip) && !preg_match(get_preg_expression('ipv4'), $ip) && !preg_match(get_preg_expression('ipv6'), $ip))

- {

- // contains invalid data, don't use the forwarded for header

- return '';

- }

- }

- }

- else

- {

- return '';

- }

- }

-

- /**

- * Get remote ip

- *

- * @return string Remote IP, determined from $_SERVER['REMOTE_ADDR']. Specialchared.

- * @access protected

- */

- protected function get_ip()

- {

- return (!empty($_SERVER['REMOTE_ADDR'])) ? htmlspecialchars($_SERVER['REMOTE_ADDR']) : '';

- }

-

- /**

- * Get server load.

- *

- * Server load is retrieved if load limitation is enabled in phpBB and server supports {@link sys_getloadavg() sys_getloadavg}

- * or file /proc/loadavg exists on the server.

- *

- * @return double Server load.

- * @access protected

- */

- protected function get_load()

- {

- $load = false;

-

- // Load limit check (if applicable)

- if (phpbb::$config['limit_load'] || phpbb::$config['limit_search_load'])

- {

- if ((function_exists('sys_getloadavg') && $load = sys_getloadavg()) || ($load = explode(' ', @file_get_contents('/proc/loadavg'))))

- {

- $load = array_slice($load, 0, 1);

- $load = floatval($load[0]);

- }

- else

- {

- set_config('limit_load', '0');

- set_config('limit_search_load', '0');

- }

- }

-

- return $load;

- }

-

- /**

- * Get current request method.

- *

- * @return string Request method, determined from $_SERVER['REQUEST_METHOD']. Specialchared, lowercase.

- * @access protected

- */

- protected function get_request_method()

- {

- return (isset($_SERVER['REQUEST_METHOD'])) ? strtolower(htmlspecialchars((string) $_SERVER['REQUEST_METHOD'])) : '';

- }

-}

-

-?> \ No newline at end of file