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rcmail.php
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rcmail.php
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<?php
/*
+-----------------------------------------------------------------------+
| program/include/rcmail.php |
| |
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2008-2011, The Roundcube Dev Team |
| Copyright (C) 2011, Kolab Systems AG |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| Application class providing core functions and holding |
| instances of all 'global' objects like db- and imap-connections |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id$
*/
/**
* Application class of Roundcube Webmail
* implemented as singleton
*
* @package Core
*/
class rcmail
{
/**
* Main tasks.
*
* @var array
*/
static public $main_tasks = array('mail','settings','addressbook','login','logout','utils','dummy');
/**
* Singleton instace of rcmail
*
* @var rcmail
*/
static private $instance;
/**
* Stores instance of rcube_config.
*
* @var rcube_config
*/
public $config;
/**
* Stores rcube_user instance.
*
* @var rcube_user
*/
public $user;
/**
* Instace of database class.
*
* @var rcube_mdb2
*/
public $db;
/**
* Instace of Memcache class.
*
* @var rcube_mdb2
*/
public $memcache;
/**
* Instace of rcube_session class.
*
* @var rcube_session
*/
public $session;
/**
* Instance of rcube_smtp class.
*
* @var rcube_smtp
*/
public $smtp;
/**
* Instance of rcube_storage class.
*
* @var rcube_storage
*/
public $storage;
/**
* Instance of rcube_template class.
*
* @var rcube_template
*/
public $output;
/**
* Instance of rcube_plugin_api.
*
* @var rcube_plugin_api
*/
public $plugins;
/**
* Current task.
*
* @var string
*/
public $task;
/**
* Current action.
*
* @var string
*/
public $action = '';
public $comm_path = './';
private $texts;
private $address_books = array();
private $caches = array();
private $action_map = array();
private $shutdown_functions = array();
private $expunge_cache = false;
const ERROR_STORAGE = -2;
const ERROR_INVALID_REQUEST = 1;
const ERROR_INVALID_HOST = 2;
const ERROR_COOKIES_DISABLED = 3;
/**
* This implements the 'singleton' design pattern
*
* @return rcmail The one and only instance
*/
static function get_instance()
{
if (!self::$instance) {
self::$instance = new rcmail();
self::$instance->startup(); // init AFTER object was linked with self::$instance
}
return self::$instance;
}
/**
* Private constructor
*/
private function __construct()
{
// load configuration
$this->config = new rcube_config();
register_shutdown_function(array($this, 'shutdown'));
}
/**
* Initial startup function
* to register session, create database and imap connections
*/
private function startup()
{
// initialize syslog
if ($this->config->get('log_driver') == 'syslog') {
$syslog_id = $this->config->get('syslog_id', 'roundcube');
$syslog_facility = $this->config->get('syslog_facility', LOG_USER);
openlog($syslog_id, LOG_ODELAY, $syslog_facility);
}
// connect to database
$this->get_dbh();
// start session
$this->session_init();
// create user object
$this->set_user(new rcube_user($_SESSION['user_id']));
// configure session (after user config merge!)
$this->session_configure();
// set task and action properties
$this->set_task(get_input_value('_task', RCUBE_INPUT_GPC));
$this->action = asciiwords(get_input_value('_action', RCUBE_INPUT_GPC));
// reset some session parameters when changing task
if ($this->task != 'utils') {
if ($this->session && $_SESSION['task'] != $this->task)
$this->session->remove('page');
// set current task to session
$_SESSION['task'] = $this->task;
}
// init output class
if (!empty($_REQUEST['_remote']))
$GLOBALS['OUTPUT'] = $this->json_init();
else
$GLOBALS['OUTPUT'] = $this->load_gui(!empty($_REQUEST['_framed']));
// create plugin API and load plugins
$this->plugins = rcube_plugin_api::get_instance();
// init plugins
$this->plugins->init();
}
/**
* Setter for application task
*
* @param string Task to set
*/
public function set_task($task)
{
$task = asciiwords($task);
if ($this->user && $this->user->ID)
$task = !$task ? 'mail' : $task;
else
$task = 'login';
$this->task = $task;
$this->comm_path = $this->url(array('task' => $this->task));
if ($this->output)
$this->output->set_env('task', $this->task);
}
/**
* Setter for system user object
*
* @param rcube_user Current user instance
*/
public function set_user($user)
{
if (is_object($user)) {
$this->user = $user;
// overwrite config with user preferences
$this->config->set_user_prefs((array)$this->user->get_prefs());
}
$lang = $this->language_prop($this->config->get('language', $_SESSION['language']));
$_SESSION['language'] = $this->user->language = $lang;
// set localization
setlocale(LC_ALL, $lang . '.utf8', $lang . '.UTF-8', 'en_US.utf8', 'en_US.UTF-8');
// workaround for http://bugs.php.net/bug.php?id=18556
if (in_array($lang, array('tr_TR', 'ku', 'az_AZ'))) {
setlocale(LC_CTYPE, 'en_US.utf8', 'en_US.UTF-8');
}
}
/**
* Check the given string and return a valid language code
*
* @param string Language code
* @return string Valid language code
*/
private function language_prop($lang)
{
static $rcube_languages, $rcube_language_aliases;
// user HTTP_ACCEPT_LANGUAGE if no language is specified
if (empty($lang) || $lang == 'auto') {
$accept_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
$lang = str_replace('-', '_', $accept_langs[0]);
}
if (empty($rcube_languages)) {
@include(INSTALL_PATH . 'program/localization/index.inc');
}
// check if we have an alias for that language
if (!isset($rcube_languages[$lang]) && isset($rcube_language_aliases[$lang])) {
$lang = $rcube_language_aliases[$lang];
}
// try the first two chars
else if (!isset($rcube_languages[$lang])) {
$short = substr($lang, 0, 2);
// check if we have an alias for the short language code
if (!isset($rcube_languages[$short]) && isset($rcube_language_aliases[$short])) {
$lang = $rcube_language_aliases[$short];
}
// expand 'nn' to 'nn_NN'
else if (!isset($rcube_languages[$short])) {
$lang = $short.'_'.strtoupper($short);
}
}
if (!isset($rcube_languages[$lang]) || !is_dir(INSTALL_PATH . 'program/localization/' . $lang)) {
$lang = 'en_US';
}
return $lang;
}
/**
* Get the current database connection
*
* @return rcube_mdb2 Database connection object
*/
public function get_dbh()
{
if (!$this->db) {
$config_all = $this->config->all();
$this->db = new rcube_mdb2($config_all['db_dsnw'], $config_all['db_dsnr'], $config_all['db_persistent']);
$this->db->sqlite_initials = INSTALL_PATH . 'SQL/sqlite.initial.sql';
$this->db->set_debug((bool)$config_all['sql_debug']);
}
return $this->db;
}
/**
* Get global handle for memcache access
*
* @return object Memcache
*/
public function get_memcache()
{
if (!isset($this->memcache)) {
// no memcache support in PHP
if (!class_exists('Memcache')) {
$this->memcache = false;
return false;
}
$this->memcache = new Memcache;
$this->mc_available = 0;
// add all configured hosts to pool
$pconnect = $this->config->get('memcache_pconnect', true);
foreach ($this->config->get('memcache_hosts', array()) as $host) {
if (substr($host, 0, 7) != 'unix://') {
list($host, $port) = explode(':', $host);
if (!$port) $port = 11211;
}
else {
$port = 0;
}
$this->mc_available += intval($this->memcache->addServer($host, $port, $pconnect, 1, 1, 15, false, array($this, 'memcache_failure')));
}
// test connection and failover (will result in $this->mc_available == 0 on complete failure)
$this->memcache->increment('__CONNECTIONTEST__', 1); // NOP if key doesn't exist
if (!$this->mc_available)
$this->memcache = false;
}
return $this->memcache;
}
/**
* Callback for memcache failure
*/
public function memcache_failure($host, $port)
{
static $seen = array();
// only report once
if (!$seen["$host:$port"]++) {
$this->mc_available--;
raise_error(array('code' => 604, 'type' => 'db',
'line' => __LINE__, 'file' => __FILE__,
'message' => "Memcache failure on host $host:$port"),
true, false);
}
}
/**
* Initialize and get cache object
*
* @param string $name Cache identifier
* @param string $type Cache type ('db', 'apc' or 'memcache')
* @param int $ttl Expiration time for cache items in seconds
* @param bool $packed Enables/disables data serialization
*
* @return rcube_cache Cache object
*/
public function get_cache($name, $type='db', $ttl=0, $packed=true)
{
if (!isset($this->caches[$name])) {
$this->caches[$name] = new rcube_cache($type, $_SESSION['user_id'], $name, $ttl, $packed);
}
return $this->caches[$name];
}
/**
* Return instance of the internal address book class
*
* @param string Address book identifier
* @param boolean True if the address book needs to be writeable
*
* @return rcube_contacts Address book object
*/
public function get_address_book($id, $writeable = false)
{
$contacts = null;
$ldap_config = (array)$this->config->get('ldap_public');
$abook_type = strtolower($this->config->get('address_book_type'));
// 'sql' is the alias for '0' used by autocomplete
if ($id == 'sql')
$id = '0';
// use existing instance
if (isset($this->address_books[$id]) && is_object($this->address_books[$id])
&& is_a($this->address_books[$id], 'rcube_addressbook')
&& (!$writeable || !$this->address_books[$id]->readonly)
) {
$contacts = $this->address_books[$id];
}
else if ($id && $ldap_config[$id]) {
$contacts = new rcube_ldap($ldap_config[$id], $this->config->get('ldap_debug'), $this->config->mail_domain($_SESSION['storage_host']));
}
else if ($id === '0') {
$contacts = new rcube_contacts($this->db, $this->user->ID);
}
else {
$plugin = $this->plugins->exec_hook('addressbook_get', array('id' => $id, 'writeable' => $writeable));
// plugin returned instance of a rcube_addressbook
if ($plugin['instance'] instanceof rcube_addressbook) {
$contacts = $plugin['instance'];
}
// get first source from the list
else if (!$id) {
$source = reset($this->get_address_sources($writeable));
if (!empty($source)) {
$contacts = $this->get_address_book($source['id']);
if ($contacts)
$id = $source['id'];
}
}
}
if (!$contacts) {
raise_error(array(
'code' => 700, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Addressbook source ($id) not found!"),
true, true);
}
// set configured sort order
if ($sort_col = $this->config->get('addressbook_sort_col'))
$contacts->set_sort_order($sort_col);
// add to the 'books' array for shutdown function
$this->address_books[$id] = $contacts;
return $contacts;
}
/**
* Return address books list
*
* @param boolean True if the address book needs to be writeable
*
* @return array Address books array
*/
public function get_address_sources($writeable = false)
{
$abook_type = strtolower($this->config->get('address_book_type'));
$ldap_config = $this->config->get('ldap_public');
$autocomplete = (array) $this->config->get('autocomplete_addressbooks');
$list = array();
// We are using the DB address book
if ($abook_type != 'ldap') {
if (!isset($this->address_books['0']))
$this->address_books['0'] = new rcube_contacts($this->db, $this->user->ID);
$list['0'] = array(
'id' => '0',
'name' => rcube_label('personaladrbook'),
'groups' => $this->address_books['0']->groups,
'readonly' => $this->address_books['0']->readonly,
'autocomplete' => in_array('sql', $autocomplete),
'undelete' => $this->address_books['0']->undelete && $this->config->get('undo_timeout'),
);
}
if ($ldap_config) {
$ldap_config = (array) $ldap_config;
foreach ($ldap_config as $id => $prop) {
// handle misconfiguration
if (empty($prop) || !is_array($prop)) {
continue;
}
$list[$id] = array(
'id' => $id,
'name' => $prop['name'],
'groups' => is_array($prop['groups']),
'readonly' => !$prop['writable'],
'hidden' => $prop['hidden'],
'autocomplete' => in_array($id, $autocomplete)
);
}
}
$plugin = $this->plugins->exec_hook('addressbooks_list', array('sources' => $list));
$list = $plugin['sources'];
foreach ($list as $idx => $item) {
// register source for shutdown function
if (!is_object($this->address_books[$item['id']]))
$this->address_books[$item['id']] = $item;
// remove from list if not writeable as requested
if ($writeable && $item['readonly'])
unset($list[$idx]);
}
return $list;
}
/**
* Init output object for GUI and add common scripts.
* This will instantiate a rcmail_template object and set
* environment vars according to the current session and configuration
*
* @param boolean True if this request is loaded in a (i)frame
* @return rcube_template Reference to HTML output object
*/
public function load_gui($framed = false)
{
// init output page
if (!($this->output instanceof rcube_template))
$this->output = new rcube_template($this->task, $framed);
// set keep-alive/check-recent interval
if ($this->session && ($keep_alive = $this->session->get_keep_alive())) {
$this->output->set_env('keep_alive', $keep_alive);
}
if ($framed) {
$this->comm_path .= '&_framed=1';
$this->output->set_env('framed', true);
}
$this->output->set_env('task', $this->task);
$this->output->set_env('action', $this->action);
$this->output->set_env('comm_path', $this->comm_path);
$this->output->set_charset(RCMAIL_CHARSET);
// add some basic labels to client
$this->output->add_label('loading', 'servererror', 'requesttimedout');
return $this->output;
}
/**
* Create an output object for JSON responses
*
* @return rcube_json_output Reference to JSON output object
*/
public function json_init()
{
if (!($this->output instanceof rcube_json_output))
$this->output = new rcube_json_output($this->task);
return $this->output;
}
/**
* Create SMTP object and connect to server
*
* @param boolean True if connection should be established
*/
public function smtp_init($connect = false)
{
$this->smtp = new rcube_smtp();
if ($connect)
$this->smtp->connect();
}
/**
* Initialize and get storage object
*
* @return rcube_storage Storage object
*/
public function get_storage()
{
// already initialized
if (!is_object($this->storage)) {
$this->storage_init();
}
return $this->storage;
}
/**
* Connect to the IMAP server with stored session data.
*
* @return bool True on success, False on error
* @deprecated
*/
public function imap_connect()
{
return $this->storage_connect();
}
/**
* Initialize IMAP object.
*
* @deprecated
*/
public function imap_init()
{
$this->storage_init();
}
/**
* Initialize storage object
*/
public function storage_init()
{
// already initialized
if (is_object($this->storage)) {
return;
}
$driver = $this->config->get('storage_driver', 'imap');
$driver_class = "rcube_{$driver}";
if (!class_exists($driver_class)) {
raise_error(array(
'code' => 700, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Storage driver class ($driver) not found!"),
true, true);
}
// Initialize storage object
$this->storage = new $driver_class;
// for backward compat. (deprecated, will be removed)
$this->imap = $this->storage;
// enable caching of mail data
$storage_cache = $this->config->get("{$driver}_cache");
$messages_cache = $this->config->get('messages_cache');
// for backward compatybility
if ($storage_cache === null && $messages_cache === null && $this->config->get('enable_caching')) {
$storage_cache = 'db';
$messages_cache = true;
}
if ($storage_cache)
$this->storage->set_caching($storage_cache);
if ($messages_cache)
$this->storage->set_messages_caching(true);
// set pagesize from config
$pagesize = $this->config->get('mail_pagesize');
if (!$pagesize) {
$pagesize = $this->config->get('pagesize', 50);
}
$this->storage->set_pagesize($pagesize);
// set class options
$options = array(
'auth_type' => $this->config->get("{$driver}_auth_type", 'check'),
'auth_cid' => $this->config->get("{$driver}_auth_cid"),
'auth_pw' => $this->config->get("{$driver}_auth_pw"),
'debug' => (bool) $this->config->get("{$driver}_debug"),
'force_caps' => (bool) $this->config->get("{$driver}_force_caps"),
'timeout' => (int) $this->config->get("{$driver}_timeout"),
'skip_deleted' => (bool) $this->config->get('skip_deleted'),
'driver' => $driver,
);
if (!empty($_SESSION['storage_host'])) {
$options['host'] = $_SESSION['storage_host'];
$options['user'] = $_SESSION['username'];
$options['port'] = $_SESSION['storage_port'];
$options['ssl'] = $_SESSION['storage_ssl'];
$options['password'] = $this->decrypt($_SESSION['password']);
// set 'imap_host' for backwards compatibility
$_SESSION[$driver.'_host'] = &$_SESSION['storage_host'];
}
$options = $this->plugins->exec_hook("storage_init", $options);
$this->storage->set_options($options);
$this->set_storage_prop();
}
/**
* Connect to the mail storage server with stored session data
*
* @return bool True on success, False on error
*/
public function storage_connect()
{
$storage = $this->get_storage();
if ($_SESSION['storage_host'] && !$storage->is_connected()) {
$host = $_SESSION['storage_host'];
$user = $_SESSION['username'];
$port = $_SESSION['storage_port'];
$ssl = $_SESSION['storage_ssl'];
$pass = $this->decrypt($_SESSION['password']);
if (!$storage->connect($host, $user, $pass, $port, $ssl)) {
if ($this->output)
$this->output->show_message($storage->get_error_code() == -1 ? 'storageerror' : 'sessionerror', 'error');
}
else {
$this->set_storage_prop();
}
}
return $storage->is_connected();
}
/**
* Create session object and start the session.
*/
public function session_init()
{
// session started (Installer?)
if (session_id())
return;
$sess_name = $this->config->get('session_name');
$sess_domain = $this->config->get('session_domain');
$lifetime = $this->config->get('session_lifetime', 0) * 60;
// set session domain
if ($sess_domain) {
ini_set('session.cookie_domain', $sess_domain);
}
// set session garbage collecting time according to session_lifetime
if ($lifetime) {
ini_set('session.gc_maxlifetime', $lifetime * 2);
}
ini_set('session.cookie_secure', rcube_https_check());
ini_set('session.name', $sess_name ? $sess_name : 'roundcube_sessid');
ini_set('session.use_cookies', 1);
ini_set('session.use_only_cookies', 1);
ini_set('session.serialize_handler', 'php');
// use database for storing session data
$this->session = new rcube_session($this->get_dbh(), $this->config);
$this->session->register_gc_handler('rcmail_temp_gc');
$this->session->register_gc_handler(array($this, 'cache_gc'));
// start PHP session (if not in CLI mode)
if ($_SERVER['REMOTE_ADDR'])
session_start();
// set initial session vars
if (!$_SESSION['user_id'])
$_SESSION['temp'] = true;
// restore skin selection after logout
if ($_SESSION['temp'] && !empty($_SESSION['skin']))
$this->config->set('skin', $_SESSION['skin']);
}
/**
* Configure session object internals
*/
public function session_configure()
{
if (!$this->session)
return;
$lifetime = $this->config->get('session_lifetime', 0) * 60;
// set keep-alive/check-recent interval
if ($keep_alive = $this->config->get('keep_alive')) {
// be sure that it's less than session lifetime
if ($lifetime)
$keep_alive = min($keep_alive, $lifetime - 30);
$keep_alive = max(60, $keep_alive);
$this->session->set_keep_alive($keep_alive);
}
$this->session->set_secret($this->config->get('des_key') . dirname($_SERVER['SCRIPT_NAME']));
$this->session->set_ip_check($this->config->get('ip_check'));
}
/**
* Perfom login to the mail server and to the webmail service.
* This will also create a new user entry if auto_create_user is configured.
*
* @param string Mail storage (IMAP) user name
* @param string Mail storage (IMAP) password
* @param string Mail storage (IMAP) host
* @param bool Enables cookie check
*
* @return boolean True on success, False on failure
*/
function login($username, $pass, $host = null, $cookiecheck = false)
{
$this->login_error = null;
if (empty($username)) {
return false;
}
if ($cookiecheck && empty($_COOKIE)) {
$this->login_error = self::ERROR_COOKIES_DISABLED;
return false;
}
$config = $this->config->all();
if (!$host)
$host = $config['default_host'];
// Validate that selected host is in the list of configured hosts
if (is_array($config['default_host'])) {
$allowed = false;
foreach ($config['default_host'] as $key => $host_allowed) {
if (!is_numeric($key))
$host_allowed = $key;
if ($host == $host_allowed) {
$allowed = true;
break;
}
}
if (!$allowed) {
$host = null;
}
}
else if (!empty($config['default_host']) && $host != rcube_parse_host($config['default_host'])) {
$host = null;
}
if (!$host) {
$this->login_error = self::ERROR_INVALID_HOST;
return false;
}
// parse $host URL
$a_host = parse_url($host);
if ($a_host['host']) {
$host = $a_host['host'];
$ssl = (isset($a_host['scheme']) && in_array($a_host['scheme'], array('ssl','imaps','tls'))) ? $a_host['scheme'] : null;
if (!empty($a_host['port']))
$port = $a_host['port'];
else if ($ssl && $ssl != 'tls' && (!$config['default_port'] || $config['default_port'] == 143))
$port = 993;
}
if (!$port) {
$port = $config['default_port'];
}
/* Modify username with domain if required
Inspired by Marco <P0L0_notspam_binware.org>
*/
// Check if we need to add domain
if (!empty($config['username_domain']) && strpos($username, '@') === false) {
if (is_array($config['username_domain']) && isset($config['username_domain'][$host]))
$username .= '@'.rcube_parse_host($config['username_domain'][$host], $host);
else if (is_string($config['username_domain']))
$username .= '@'.rcube_parse_host($config['username_domain'], $host);
}
// Convert username to lowercase. If storage backend
// is case-insensitive we need to store always the same username (#1487113)
if ($config['login_lc']) {
if ($config['login_lc'] == 2 || $config['login_lc'] === true) {
$username = mb_strtolower($username);
}
else if (strpos($username, '@')) {
// lowercase domain name
list($local, $domain) = explode('@', $username);
$username = $local . '@' . mb_strtolower($domain);
}
}
// try to resolve email address from virtuser table
if (strpos($username, '@') && ($virtuser = rcube_user::email2user($username))) {
$username = $virtuser;
}
// Here we need IDNA ASCII
// Only rcube_contacts class is using domain names in Unicode
$host = rcube_idn_to_ascii($host);
$username = rcube_idn_to_ascii($username);
// user already registered -> overwrite username
if ($user = rcube_user::query($username, $host)) {
$username = $user->data['username'];
}
if (!$this->storage)
$this->storage_init();
// try to log in
if (!($login = $this->storage->connect($host, $username, $pass, $port, $ssl))) {
// try with lowercase
$username_lc = mb_strtolower($username);
if ($username_lc != $username) {
// try to find user record again -> overwrite username
if (!$user && ($user = rcube_user::query($username_lc, $host)))
$username_lc = $user->data['username'];
if ($login = $this->storage->connect($host, $username_lc, $pass, $port, $ssl))
$username = $username_lc;
}
}
// exit if login failed
if (!$login) {
return false;
}
// user already registered -> update user's record
if (is_object($user)) {
// update last login timestamp
$user->touch();
}
// create new system user
else if ($config['auto_create_user']) {
if ($created = rcube_user::create($username, $host)) {
$user = $created;
}
else {
raise_error(array(
'code' => 620, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Failed to create a user record. Maybe aborted by a plugin?"
), true, false);
}
}
else {
raise_error(array(
'code' => 621, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Access denied for new user $username. 'auto_create_user' is disabled"
), true, false);
}
// login succeeded
if (is_object($user) && $user->ID) {
// Configure environment
$this->set_user($user);
$this->set_storage_prop();
$this->session_configure();
// fix some old settings according to namespace prefix
$this->fix_namespace_settings($user);
// create default folders on first login
if ($config['create_default_folders'] && (!empty($created) || empty($user->data['last_login']))) {
$this->storage->create_default_folders();
}
// set session vars
$_SESSION['user_id'] = $user->ID;
$_SESSION['username'] = $user->data['username'];
$_SESSION['storage_host'] = $host;
$_SESSION['storage_port'] = $port;
$_SESSION['storage_ssl'] = $ssl;
$_SESSION['password'] = $this->encrypt($pass);
$_SESSION['login_time'] = time();