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egroupware/api/src/Egw.php

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<?php
/**
* EGroupware API - Applications
*
* @link http://www.egroupware.org
* This file was originaly written by Dan Kuykendall and Joseph Engo
* Copyright (C) 2000, 2001 Dan Kuykendall
* Parts Copyright (C) 2003 Free Software Foundation
* @author RalfBecker@outdoor-training.de
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @version $Id$
*/
namespace EGroupware\Api;
// explicitly list old, non-namespaced classes
// they are only used, if phpgwapi is installed
use accounts as egw_accounts;
use egw_session;
use common;
/**
* New written class to create the eGW enviroment AND restore it from a php-session
*
* Rewritten by RalfBecker@outdoor-training.de to store the eGW enviroment
* (egw-object and egw_info-array) in a php-session and restore it from
* there instead of creating it completly new on each page-request.
* The enviroment gets now created by the egw-class
*
* Extending Egw\Base which uses now a getter method to create the usual subobject on demand,
* to allow a quicker header include on sites not using php4-restore.
* This also makes a lot of application code, like the following, unnecessary:
* if (!is_object($GLOBALS['egw']->ldap)
* {
* $GLOBALS['egw']->ldap = Api\Ldap::factory();
* }
* You can now simply use $GLOBALS['egw']->ldap, and the egw class instanciates it for you on demand.
*/
class Egw extends Egw\Base
{
/**
* Turn on debug mode. Will output additional data for debugging purposes.
* @var string
* @access public
*/
var $debug = 0; // This will turn on debugging information.
/**
* Instance of the account object
*
* @var Accounts
*/
var $accounts;
/**
* @var Session
*/
public $session;
/**
* Constructor: Instantiates the sub-classes
*
* @author RalfBecker@outdoor-training.de
* @param array $domain_names array with valid egw-domain names
*/
function __construct($domain_names=null)
{
$GLOBALS['egw'] =& $this; // we need to be immediately available there for the other classes we instantiate
$this->setup($domain_names,True);
}
/**
* Called every time the constructor is called. Also called by sessions to ensure the correct db,
* in which case we do not recreate the session object.
* @author RalfBecker@outdoor-training.de (moved to setup() by milos@groupwhere.org
* @param array|null $domain_names =null array with valid egw-domain names
* @param boolean $createsessionobject True to create the session object (default=True)
*/
function setup($domain_names,$createsessionobject=True)
{
// create the DB-object
// as SiteMgr, Wiki, KnowledgeBase and probably more still use eg next_record(), we stick with Db\Deprecated for now
$this->db = new Db\Deprecated($GLOBALS['egw_info']['server']);
if ($this->debug)
{
$this->db->Debug = 1;
}
$this->db->set_app(Db::API_APPNAME);
// check if eGW is already setup, if not redirect to setup/
try {
$this->db->connect();
$num_config = $this->db->select(Config::TABLE,'COUNT(config_name)',false,__LINE__,__FILE__)->fetchColumn();
}
catch(Db\Exception\Connection $e) {
// ignore exception, get handled below
}
catch(Db\Exception\InvalidSql $e1) {
unset($e1); // not used
try {
$phpgw_config = $this->db->select('phpgw_config','COUNT(config_name)',false,__LINE__,__FILE__)->fetchColumn();
}
catch (Db\Exception\InvalidSql $e2) {
unset($e2); // not used
// ignor error, get handled below
}
}
if (!$num_config)
{
// we check for the old table too, to not scare updating users ;-)
if ($phpgw_config)
{
throw new Exception('You need to update EGroupware before you can continue using it.',999);
}
if ($e)
{
throw new Db\Exception\Setup('Connection with '.$e->getMessage()."\n\n".
'Maybe you not created a database for EGroupware yet.',999);
}
throw new Db\Exception\Setup('It appears that you have not created the database tables for EGroupware.',999);
}
// Set the DB's client charset if a system-charset is set and some other values needed by egw_cache (used in Config::read)
foreach($this->db->select(Config::TABLE,'config_name,config_value',array(
'config_app' => 'phpgwapi',
'config_name' => array('system_charset','install_id','temp_dir'),
),__LINE__,__FILE__) as $row)
{
$GLOBALS['egw_info']['server'][$row['config_name']] = $row['config_value'];
}
if ($GLOBALS['egw_info']['server']['system_charset'] && $GLOBALS['egw_info']['server']['system_charset'] != 'utf-8')
{
$this->db->Link_ID->SetCharSet($GLOBALS['egw_info']['server']['system_charset']);
}
// load up the $GLOBALS['egw_info']['server'] array
$GLOBALS['egw_info']['server'] += Config::read('phpgwapi');
// if webserver_url does not match eg. because of proxying, fix it
if (isset($_SERVER['HTTP_X_FORWARDED_URI']) &&
($prefix = strpos($_SERVER['HTTP_X_FORWARDED_URI'],
$GLOBALS['egw_info']['server']['webserver_url'])))
{
$GLOBALS['egw_info']['server']['webserver_url'] =
substr($_SERVER['HTTP_X_FORWARDED_URI'], 0, $prefix).
$GLOBALS['egw_info']['server']['webserver_url'];
}
if (isset($_SERVER['HTTP_X_FORWARDED_HOST']) && $GLOBALS['egw_info']['server']['webserver_url'][0] != '/')
{
$GLOBALS['egw_info']['server']['webserver_url'] =
Header\Http::schema().'://'.Header\Http::host().
parse_url($GLOBALS['egw_info']['server']['webserver_url'], PHP_URL_PATH);
}
// if no server timezone set, use date_default_timezone_get() to determine it once
// it fills to log with deprecated warnings under 5.3 otherwise
if (empty($GLOBALS['egw_info']['server']['server_timezone']) ||
$GLOBALS['egw_info']['server']['server_timezone'] == 'System/Localtime') // treat invalid tz like empty!
{
try
{
$tz = new \DateTimeZone(date_default_timezone_get());
Config::save_value('server_timezone',$GLOBALS['egw_info']['server']['server_timezone'] = $tz->getName(),'phpgwapi');
error_log(__METHOD__."() stored server_timezone=".$GLOBALS['egw_info']['server']['server_timezone']);
}
catch(Exception $e)
{
// do nothing if new DateTimeZone fails (eg. 'System/Localtime' returned), specially do NOT store it!
error_log(__METHOD__."() NO valid 'date.timezone' set in your php.ini!");
}
}
date_default_timezone_set($GLOBALS['egw_info']['server']['server_timezone']);
// if phpgwapi exists we prefer accounts and egw_session, as they have some deprecated methods
if (file_exists(EGW_SERVER_ROOT.'/phpgwapi'))
{
$this->accounts = new egw_accounts();
/* Do not create the session object if called by the sessions class. This way
* we ensure the correct db based on the user domain.
*/
if($createsessionobject)
{
$this->session = new egw_session($domain_names);
}
}
else
{
$this->accounts = new Accounts();
/* Do not create the session object if called by the sessions class. This way
* we ensure the correct db based on the user domain.
*/
if($createsessionobject)
{
$this->session = new Session($domain_names);
}
}
// setup the other subclasses
$this->acl = new Acl();
$this->preferences = new Preferences();
$this->applications = new Egw\Applications();
if ($GLOBALS['egw_info']['flags']['currentapp'] != 'login' && $GLOBALS['egw_info']['flags']['currentapp'] != 'logout')
{
$this->define_egw_constants();
$this->verify_session();
$this->applications->read_installed_apps(); // to get translated app-titles, has to be after verify_session
$this->check_app_rights();
$this->load_optional_classes();
}
else // set the defines for login, in case it's more then just login
{
$this->define_egw_constants();
}
}
/**
* __wakeup function gets called by php while unserializing the egw-object, eg. reconnects to the DB
*
* @author RalfBecker@outdoor-training.de
*/
function __wakeup()
{
$GLOBALS['egw'] =& $this; // we need to be immediately available there for the other classes we instantiate
// for the migration: reference us to the old phpgw object
$GLOBALS['phpgw'] =& $this;
if ($GLOBALS['egw_info']['server']['system_charset'])
{
$this->db->Link_ID->SetCharSet($GLOBALS['egw_info']['server']['system_charset']);
}
// restoring server timezone, to avoid warnings under php5.3
if (!empty($GLOBALS['egw_info']['server']['server_timezone']))
{
date_default_timezone_set($GLOBALS['egw_info']['server']['server_timezone']);
}
$this->define_egw_constants();
}
/**
* wakeup2 function needs to be called after unserializing the egw-object
*
* It adapts the restored object/enviroment to the changed (current) application / page-request
*
* @author RalfBecker@outdoor-training.de
*/
function wakeup2()
{
// do some application specific stuff, need to be done as we are different (current) app now
if (isset($this->template))
{
$this->template->set_root(EGW_APP_TPL);
}
// init the translation class, necessary as own wakeup would run before our's
Translation::init(isset($GLOBALS['egw_info']['flags']['load_translations']) ? $GLOBALS['egw_info']['flags']['load_translations'] : true);
// verify the session
$GLOBALS['egw']->verify_session();
$GLOBALS['egw']->check_app_rights();
$this->load_optional_classes();
}
/**
* load optional classes by mentioning them in egw_info[flags][enable_CLASS_class] => true
*
* Also loads the template-class if not egw_info[flags][disable_Template_class] is set
*
* Maybe the whole thing should be depricated ;-)
*/
function load_optional_classes()
{
// output the header unless the developer turned it off
if (!@$GLOBALS['egw_info']['flags']['noheader'])
{
echo $GLOBALS['egw']->framework->header();
if (!$GLOBALS['egw_info']['flags']['nonavbar'])
{
echo $GLOBALS['egw']->framework->navbar();
}
}
}
/**
* Verfiy there is a valid session
*
* One can specify a callback, which gets called if there's no valid session. If the callback returns true, the parameter
* containst account-details (in keys login, passwd and passwd_type) to automatic create an (anonymous session)
*
* It also checks if enforce_ssl is set in the DB and redirects to the https:// version of the site.
*
* If there is no valid session and none could be automatic created, the function will redirect to login and NOT return
*/
function verify_session()
{
if($GLOBALS['egw_info']['server']['enforce_ssl'] === 'redirect' && Header\Http::schema() !== 'https')
{
Header('Location: https://' . Header\Http::host() . $_SERVER['REQUEST_URI']);
exit;
}
// check if we have a session, if not try to automatic create one
if ($this->session->verify()) return true;
$account = null;
if (($account_callback = $GLOBALS['egw_info']['flags']['autocreate_session_callback']) && is_callable($account_callback) &&
($sessionid = call_user_func_array($account_callback,array(&$account))) === true) // $account_call_back returns true, false or a session-id
{
$sessionid = $this->session->create($account);
}
if (!$sessionid)
{
//echo "<p>account_callback='$account_callback', account=".print_r($account,true).", sessionid=$sessionid</p>\n"; exit;
// we forward to the same place after the re-login
if ($GLOBALS['egw_info']['server']['webserver_url'] && $GLOBALS['egw_info']['server']['webserver_url'] != '/' &&
($webserver_path = parse_url($GLOBALS['egw_info']['server']['webserver_url'],PHP_URL_PATH)) && $webserver_path != '/')
{
// we have to use only path component, to cope with domains like http://egroupware.domain.com and /egroupware
list(,$relpath) = explode($webserver_path,parse_url($_SERVER['PHP_SELF'],PHP_URL_PATH),2);
}
else // the webserver-url is empty or just a slash '/' (eGW is installed in the docroot and no domain given)
{
$matches = null;
if (preg_match('/^https?:\/\/[^\/]*\/(.*)$/',$relpath=$_SERVER['PHP_SELF'],$matches))
{
$relpath = $matches[1];
}
}
// remove evtl. set caching headers, we dont want the "Session not verified" redirect to be cached
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Expires: Thu, 19 Nov 1981 08:52:00 GMT');
header('Pragma: no-cache');
// this removes the sessiondata if its saved in the URL
$query = preg_replace('/[&]?sessionid(=|%3D)[^&]+&kp3(=|%3D)[^&]+&domain=.*$/','',$_SERVER['QUERY_STRING']);
if ($GLOBALS['egw_info']['server']['http_auth_types'])
{
$redirect = '/api/ntlm/index.php?';
}
else
{
$redirect = '/login.php?';
// only add "your session could not be verified", if a sessionid is given (cookie or on url)
if (Session::get_sessionid()) $redirect .= 'cd=10&';
}
if ($relpath) $redirect .= 'phpgw_forward='.urlencode($relpath.(!empty($query) ? '?'.$query : ''));
self::redirect_link($redirect);
}
}
/**
* Verify the user has rights for the requested app
*
* If the user has no rights for the app (eg. called via URL) he get a permission denied page (this function does NOT return)
*
* @throws Exception\Redirect for anonymous user accessing something he has no rights to
* @throws Exception\NoPermission\Admin
* @throws Exception\NoPermission\App
*/
function check_app_rights()
{
$this->currentapp = $GLOBALS['egw_info']['flags']['currentapp']; // some apps change it later
if (!in_array($GLOBALS['egw_info']['flags']['currentapp'], array('api','about'))) // give everyone implicit api rights
{
// This will need to use ACL in the future
if (!$GLOBALS['egw_info']['user']['apps'][$currentapp = $GLOBALS['egw_info']['flags']['currentapp']] ||
($GLOBALS['egw_info']['flags']['admin_only'] && !$GLOBALS['egw_info']['user']['apps']['admin']))
{
// present a login page, if anon user has no right for an application
if ($this->session->session_flags == 'A')
{
// need to destroy a basic auth session here, because it will only be available on current url
if (($sessionid = Session::get_sessionid(true)))
{
$GLOBALS['egw']->session->destroy($sessionid);
}
throw new Exception\Redirect(self::link('/logout.php'));
}
if ($currentapp == 'admin' || $GLOBALS['egw_info']['flags']['admin_only'])
{
throw new Exception\NoPermission\Admin();
}
throw new Exception\NoPermission\App($currentapp);
}
}
}
/**
* create all the defines / constants of the eGW-environment (plus the deprecated phpgw ones)
*/
function define_egw_constants()
{
define('EGW_ACL_READ',1);
define('EGW_ACL_ADD',2);
define('EGW_ACL_EDIT',4);
define('EGW_ACL_DELETE',8);
define('EGW_ACL_PRIVATE',16);
define('EGW_ACL_GROUP_MANAGERS',32);
define('EGW_ACL_CUSTOM_1',64);
define('EGW_ACL_CUSTOM_2',128);
define('EGW_ACL_CUSTOM_3',256);
// and the old ones
define('PHPGW_ACL_READ',1);
define('PHPGW_ACL_ADD',2);
define('PHPGW_ACL_EDIT',4);
define('PHPGW_ACL_DELETE',8);
define('PHPGW_ACL_PRIVATE',16);
define('PHPGW_ACL_GROUP_MANAGERS',32);
define('PHPGW_ACL_CUSTOM_1',64);
define('PHPGW_ACL_CUSTOM_2',128);
define('PHPGW_ACL_CUSTOM_3',256);
// A few hacker resistant constants that will be used throught the program
if (file_exists(EGW_SERVER_ROOT.'/phpgwapi'))
{
define('EGW_TEMPLATE_DIR', Framework\Template::get_dir('phpgwapi'));
define('EGW_IMAGES_DIR', common::get_image_path('phpgwapi'));
define('EGW_IMAGES_FILEDIR', common::get_image_dir('phpgwapi'));
define('EGW_APP_ROOT', common::get_app_dir());
define('EGW_APP_INC', common::get_inc_dir());
try {
define('EGW_APP_TPL', Framework\Template::get_dir());
}
catch (Exception\WrongParameter $e) {
unset($e);
define('EGW_APP_TPL', null);
}
define('EGW_IMAGES', common::get_image_path());
define('EGW_APP_IMAGES_DIR', common::get_image_dir());
// and the old ones
define('PHPGW_TEMPLATE_DIR',EGW_TEMPLATE_DIR);
define('PHPGW_IMAGES_DIR',EGW_IMAGES_DIR);
define('PHPGW_IMAGES_FILEDIR',EGW_IMAGES_FILEDIR);
define('PHPGW_APP_ROOT',EGW_APP_ROOT);
define('PHPGW_APP_INC',EGW_APP_INC);
define('PHPGW_APP_TPL',EGW_APP_TPL);
define('PHPGW_IMAGES',EGW_IMAGES);
define('PHPGW_APP_IMAGES_DIR',EGW_APP_IMAGES_DIR);
}
}
/**
* force the session cache to be re-created, because some of it's data changed
*
* Needs to be called if user-preferences, system-config or enabled apps of the current user have been changed and
* the change should have immediate effect
*/
static function invalidate_session_cache()
{
// if sharing is active, we must not invalidate the session, as it can not be regenerated
if (empty($GLOBALS['egw']->sharing))
{
unset($_SESSION['egw_info_cache']);
unset($_SESSION['egw_object_cache']);
}
}
/**
* run string through htmlspecialchars and stripslashes
*
* @param string $s
* @return string The string with html special characters replaced with entities
*/
static function strip_html($s)
{
return htmlspecialchars(stripslashes($s));
}
/**
* Link url generator
*
* @param string $url url link is for
* @param string|array $extravars ='' extra params to be added to url
* @param string $link_app =null if appname or true, some templates generate a special link-handler url
* @return string The full url after processing
*/
static function link($url, $extravars = '', $link_app=null)
{
return $GLOBALS['egw']->framework->link($url, $extravars, $link_app);
}
/**
* Redirects direct to a generated link
*
* @param string $url url link is for
* @param string|array $extravars ='' extra params to be added to url
* @param string $link_app =null if appname or true, some templates generate a special link-handler url
* @return string The full url after processing
*/
static function redirect_link($url, $extravars='', $link_app=null)
{
return $GLOBALS['egw']->framework->redirect_link($url, $extravars, $link_app);
}
/**
* Handles redirects under iis and apache, it does NOT return (calls exit)
*
* This function handles redirects under iis and apache it assumes that $phpgw->link() has already been called
*
* @param string $url url to redirect to
* @param string $link_app =null appname to redirect for, default currentapp
*/
static function redirect($url, $link_app=null)
{
Framework::redirect($url, $link_app);
}
/**
* Shortcut to translation class
*
* This function is a basic wrapper to Translation::translate()
*
* @deprecated only used in the old timetracker
* @param string The key for the phrase
* @see Translation::translate()
*/
static function lang($key,$args=null)
{
if (!is_array($args))
{
$args = func_get_args();
array_shift($args);
}
return Translation::translate($key,$args);
}
/**
* registered shutdown callbacks and optional arguments
*
* @var array
*/
private static $shutdown_callbacks = array();
/**
* Register a callback to run on shutdown AFTER output send to user
*
* Allows eg. static classes (no destructor) to run on shutdown AND
* garanties to run AFTER output send to user.
*
* @param callable $callback use array($classname, $method) for static methods
* @param array $args =array()
*/
public static function on_shutdown($callback, array $args=array())
{
array_unshift($args, $callback);
// prepend new callback, to run them in oposite order they are registered
array_unshift(self::$shutdown_callbacks, $args);
}
/**
* Shutdown handler running all registered on_shutdown callbacks and then disconnecting from db
*/
function __destruct()
{
if (!defined('EGW_SHUTDOWN'))
{
define('EGW_SHUTDOWN',True);
// send json response BEFORE flushing output
if (Json\Request::isJSONRequest())
{
Json\Response::sendResult();
}
// run all on_shutdown callbacks with session in their name (eg. egw_link::save_session_cache), do NOT stop on exceptions
foreach(self::$shutdown_callbacks as $n => $data)
{
try {
//error_log(__METHOD__."() running ".array2string($data));
$callback = array_shift($data);
if (!is_array($callback) || strpos($callback[1], 'session') === false) continue;
call_user_func_array($callback, $data);
}
catch (\Exception $ex) {
_egw_log_exception($ex);
}
unset(self::$shutdown_callbacks[$n]);
}
// now we can close the session
// without closing the session fastcgi_finish_request() will NOT send output to user
if (isset($GLOBALS['egw']->session) && is_object($GLOBALS['egw']->session)) $GLOBALS['egw']->session->commit_session();
// flush all output to user
/* does NOT work on Apache :-(
for($i = 0; ob_get_level() && $i < 10; ++$i)
{
ob_end_flush();
}
flush();*/
// working for fastCGI :-)
if (function_exists('fastcgi_finish_request') && substr($_SERVER['PHP_SELF'], -18) != '/asyncservices.php')
{
fastcgi_finish_request();
ini_set('error_log', dirname($GLOBALS['egw_info']['server']['files_dir']) . '/on-shutdown.log');
}
// run all on_shutdown, do NOT stop on exceptions
foreach(self::$shutdown_callbacks as $data)
{
try {
//error_log(__METHOD__."() running ".array2string($data));
$callback = array_shift($data);
call_user_func_array($callback, $data);
}
catch (\Exception $ex) {
_egw_log_exception($ex);
}
}
// call the asyncservice check_run function if it is not explicitly set to cron-only
if (!$GLOBALS['egw_info']['server']['asyncservice']) // is default
{
$async = new Asyncservice();
$async->check_run('fallback');
}
$this->db->disconnect();
}
}
}
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