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<?php
/*
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2008-2013, The Roundcube Dev Team |
| |
| 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: |
| Class to read configuration settings |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Configuration class for Roundcube
*
* @package Framework
* @subpackage Core
*/
class rcube_config
{
const DEFAULT_SKIN = 'larry';
private $env = '';
private $paths = array();
private $prop = array();
private $errors = array();
private $userprefs = array();
/**
* Renamed options
*
* @var array
*/
private $legacy_props = array(
// new name => old name
'default_folders' => 'default_imap_folders',
'mail_pagesize' => 'pagesize',
'addressbook_pagesize' => 'pagesize',
'reply_mode' => 'top_posting',
'refresh_interval' => 'keep_alive',
'min_refresh_interval' => 'min_keep_alive',
'messages_cache_ttl' => 'message_cache_lifetime',
'redundant_attachments_cache_ttl' => 'redundant_attachments_memcache_ttl',
);
/**
* Object constructor
*
* @param string Environment suffix for config files to load
*/
public function __construct($env = '')
{
$this->env = $env;
if ($paths = getenv('RCUBE_CONFIG_PATH')) {
$this->paths = explode(PATH_SEPARATOR, $paths);
// make all paths absolute
foreach ($this->paths as $i => $path) {
if (!rcube_utils::is_absolute_path($path)) {
if ($realpath = realpath(RCUBE_INSTALL_PATH . $path)) {
$this->paths[$i] = unslashify($realpath) . '/';
}
else {
unset($this->paths[$i]);
}
}
else {
$this->paths[$i] = unslashify($path) . '/';
}
}
}
if (defined('RCUBE_CONFIG_DIR') && !in_array(RCUBE_CONFIG_DIR, $this->paths)) {
$this->paths[] = RCUBE_CONFIG_DIR;
}
if (empty($this->paths)) {
$this->paths[] = RCUBE_INSTALL_PATH . 'config/';
}
$this->load();
// Defaults, that we do not require you to configure,
// but contain information that is used in various
// locations in the code:
$this->set('contactlist_fields', array('name', 'firstname', 'surname', 'email'));
}
/**
* Load config from local config file
*
* @todo Remove global $CONFIG
*/
private function load()
{
// Load default settings
if (!$this->load_from_file('defaults.inc.php')) {
$this->errors[] = 'defaults.inc.php was not found.';
}
// load main config file
if (!$this->load_from_file('config.inc.php')) {
// Old configuration files
if (!$this->load_from_file('main.inc.php') ||
!$this->load_from_file('db.inc.php')) {
$this->errors[] = 'config.inc.php was not found.';
}
else if (rand(1,100) == 10) { // log warning on every 100th request (average)
trigger_error("config.inc.php was not found. Please migrate your config by running bin/update.sh", E_USER_WARNING);
}
}
// load host-specific configuration
$this->load_host_config();
// set skin (with fallback to old 'skin_path' property)
if (empty($this->prop['skin'])) {
if (!empty($this->prop['skin_path'])) {
$this->prop['skin'] = str_replace('skins/', '', unslashify($this->prop['skin_path']));
}
else {
$this->prop['skin'] = self::DEFAULT_SKIN;
}
}
// larry is the new default skin :-)
if ($this->prop['skin'] == 'default')
$this->prop['skin'] = self::DEFAULT_SKIN;
// fix paths
$this->prop['log_dir'] = $this->prop['log_dir'] ? realpath(unslashify($this->prop['log_dir'])) : RCUBE_INSTALL_PATH . 'logs';
$this->prop['temp_dir'] = $this->prop['temp_dir'] ? realpath(unslashify($this->prop['temp_dir'])) : RCUBE_INSTALL_PATH . 'temp';
// fix default imap folders encoding
foreach (array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox') as $folder)
$this->prop[$folder] = rcube_charset::convert($this->prop[$folder], RCUBE_CHARSET, 'UTF7-IMAP');
if (!empty($this->prop['default_folders']))
foreach ($this->prop['default_folders'] as $n => $folder)
$this->prop['default_folders'][$n] = rcube_charset::convert($folder, RCUBE_CHARSET, 'UTF7-IMAP');
// set PHP error logging according to config
if ($this->prop['debug_level'] & 1) {
ini_set('log_errors', 1);
if ($this->prop['log_driver'] == 'syslog') {
ini_set('error_log', 'syslog');
}
else {
ini_set('error_log', $this->prop['log_dir'].'/errors');
}
}
// enable display_errors in 'show' level, but not for ajax requests
ini_set('display_errors', intval(empty($_REQUEST['_remote']) && ($this->prop['debug_level'] & 4)));
// remove deprecated properties
unset($this->prop['dst_active']);
// export config data
$GLOBALS['CONFIG'] = &$this->prop;
}
/**
* Load a host-specific config file if configured
* This will merge the host specific configuration with the given one
*/
private function load_host_config()
{
if (empty($this->prop['include_host_config'])) {
return;
}
foreach (array('HTTP_HOST', 'SERVER_NAME', 'SERVER_ADDR') as $key) {
$fname = null;
$name = $_SERVER[$key];
if (!$name) {
continue;
}
if (is_array($this->prop['include_host_config'])) {
$fname = $this->prop['include_host_config'][$name];
}
else {
$fname = preg_replace('/[^a-z0-9\.\-_]/i', '', $name) . '.inc.php';
}
if ($fname && $this->load_from_file($fname)) {
return;
}
}
}
/**
* Read configuration from a file
* and merge with the already stored config values
*
* @param string $file Name of the config file to be loaded
* @return booelan True on success, false on failure
*/
public function load_from_file($file)
{
$success = false;
foreach ($this->resolve_paths($file) as $fpath) {
if ($fpath && is_file($fpath) && is_readable($fpath)) {
// use output buffering, we don't need any output here
ob_start();
include($fpath);
ob_end_clean();
if (is_array($config)) {
$this->merge($config);
$success = true;
}
// deprecated name of config variable
if (is_array($rcmail_config)) {
$this->merge($rcmail_config);
$success = true;
}
}
}
return $success;
}
/**
* Helper method to resolve absolute paths to the given config file.
* This also takes the 'env' property into account.
*
* @param string Filename or absolute file path
* @param boolean Return -$env file path if exists
* @return array List of candidates in config dir path(s)
*/
public function resolve_paths($file, $use_env = true)
{
$files = array();
$abs_path = rcube_utils::is_absolute_path($file);
foreach ($this->paths as $basepath) {
$realpath = $abs_path ? $file : realpath($basepath . '/' . $file);
// check if <file>-env.ini exists
if ($realpath && $use_env && !empty($this->env)) {
$envfile = preg_replace('/\.(inc.php)$/', '-' . $this->env . '.\\1', $realpath);
if (is_file($envfile))
$realpath = $envfile;
}
if ($realpath) {
$files[] = $realpath;
// no need to continue the loop if an absolute file path is given
if ($abs_path) {
break;
}
}
}
return $files;
}
/**
* Getter for a specific config parameter
*
* @param string $name Parameter name
* @param mixed $def Default value if not set
* @return mixed The requested config value
*/
public function get($name, $def = null)
{
if (isset($this->prop[$name])) {
$result = $this->prop[$name];
}
else {
$result = $def;
}
$rcube = rcube::get_instance();
if ($name == 'timezone') {
if (empty($result) || $result == 'auto') {
$result = $this->client_timezone();
}
}
else if ($name == 'client_mimetypes') {
if ($result == null && $def == null)
$result = 'text/plain,text/html,text/xml,image/jpeg,image/gif,image/png,image/bmp,image/tiff,application/x-javascript,application/pdf,application/x-shockwave-flash';
if ($result && is_string($result))
$result = explode(',', $result);
}
$plugin = $rcube->plugins->exec_hook('config_get', array(
'name' => $name, 'default' => $def, 'result' => $result));
return $plugin['result'];
}
/**
* Setter for a config parameter
*
* @param string $name Parameter name
* @param mixed $value Parameter value
*/
public function set($name, $value)
{
$this->prop[$name] = $value;
}
/**
* Override config options with the given values (eg. user prefs)
*
* @param array $prefs Hash array with config props to merge over
*/
public function merge($prefs)
{
$prefs = $this->fix_legacy_props($prefs);
$this->prop = array_merge($this->prop, $prefs, $this->userprefs);
}
/**
* Merge the given prefs over the current config
* and make sure that they survive further merging.
*
* @param array $prefs Hash array with user prefs
*/
public function set_user_prefs($prefs)
{
$prefs = $this->fix_legacy_props($prefs);
// Honor the dont_override setting for any existing user preferences
$dont_override = $this->get('dont_override');
if (is_array($dont_override) && !empty($dont_override)) {
foreach ($dont_override as $key) {
unset($prefs[$key]);
}
}
// larry is the new default skin :-)
if ($prefs['skin'] == 'default') {
$prefs['skin'] = self::DEFAULT_SKIN;
}
$this->userprefs = $prefs;
$this->prop = array_merge($this->prop, $prefs);
}
/**
* Getter for all config options
*
* @return array Hash array containing all config properties
*/
public function all()
{
$rcube = rcube::get_instance();
$plugin = $rcube->plugins->exec_hook('config_get', array(
'name' => '*', 'result' => $this->prop));
return $plugin['result'];
}
/**
* Special getter for user's timezone offset including DST
*
* @return float Timezone offset (in hours)
* @deprecated
*/
public function get_timezone()
{
if ($tz = $this->get('timezone')) {
try {
$tz = new DateTimeZone($tz);
return $tz->getOffset(new DateTime('now')) / 3600;
}
catch (Exception $e) {
}
}
return 0;
}
/**
* Return requested DES crypto key.
*
* @param string $key Crypto key name
* @return string Crypto key
*/
public function get_crypto_key($key)
{
// Bomb out if the requested key does not exist
if (!array_key_exists($key, $this->prop)) {
rcube::raise_error(array(
'code' => 500, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Request for unconfigured crypto key \"$key\""
), true, true);
}
$key = $this->prop[$key];
// Bomb out if the configured key is not exactly 24 bytes long
if (strlen($key) != 24) {
rcube::raise_error(array(
'code' => 500, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Configured crypto key '$key' is not exactly 24 bytes long"
), true, true);
}
return $key;
}
/**
* Try to autodetect operating system and find the correct line endings
*
* @return string The appropriate mail header delimiter
*/
public function header_delimiter()
{
// use the configured delimiter for headers
if (!empty($this->prop['mail_header_delimiter'])) {
$delim = $this->prop['mail_header_delimiter'];
if ($delim == "\n" || $delim == "\r\n")
return $delim;
else
rcube::raise_error(array(
'code' => 500, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "Invalid mail_header_delimiter setting"
), true, false);
}
$php_os = strtolower(substr(PHP_OS, 0, 3));
if ($php_os == 'win')
return "\r\n";
if ($php_os == 'mac')
return "\r\n";
return "\n";
}
/**
* Return the mail domain configured for the given host
*
* @param string $host IMAP host
* @param boolean $encode If true, domain name will be converted to IDN ASCII
* @return string Resolved SMTP host
*/
public function mail_domain($host, $encode=true)
{
$domain = $host;
if (is_array($this->prop['mail_domain'])) {
if (isset($this->prop['mail_domain'][$host]))
$domain = $this->prop['mail_domain'][$host];
}
else if (!empty($this->prop['mail_domain'])) {
$domain = rcube_utils::parse_host($this->prop['mail_domain']);
}
if ($encode) {
$domain = rcube_utils::idn_to_ascii($domain);
}
return $domain;
}
/**
* Getter for error state
*
* @return mixed Error message on error, False if no errors
*/
public function get_error()
{
return empty($this->errors) ? false : join("\n", $this->errors);
}
/**
* Internal getter for client's (browser) timezone identifier
*/
private function client_timezone()
{
// @TODO: remove this legacy timezone handling in the future
$props = $this->fix_legacy_props(array('timezone' => $_SESSION['timezone']));
if (!empty($props['timezone'])) {
try {
$tz = new DateTimeZone($props['timezone']);
return $tz->getName();
}
catch (Exception $e) { /* gracefully ignore */ }
}
// fallback to server's timezone
return date_default_timezone_get();
}
/**
* Convert legacy options into new ones
*
* @param array $props Hash array with config props
*
* @return array Converted config props
*/
private function fix_legacy_props($props)
{
foreach ($this->legacy_props as $new => $old) {
if (isset($props[$old])) {
if (!isset($props[$new])) {
$props[$new] = $props[$old];
}
unset($props[$old]);
}
}
// convert deprecated numeric timezone value
if (isset($props['timezone']) && is_numeric($props['timezone'])) {
if ($tz = self::timezone_name_from_abbr($props['timezone'])) {
$props['timezone'] = $tz;
}
else {
unset($props['timezone']);
}
}
return $props;
}
/**
* timezone_name_from_abbr() replacement. Converts timezone offset
* into timezone name abbreviation.
*
* @param float $offset Timezone offset (in hours)
*
* @return string Timezone abbreviation
*/
static public function timezone_name_from_abbr($offset)
{
// List of timezones here is not complete - https://bugs.php.net/bug.php?id=44780
if ($tz = timezone_name_from_abbr('', $offset * 3600, 0)) {
return $tz;
}
// try with more complete list (#1489261)
$timezones = array(
'-660' => "Pacific/Apia",
'-600' => "Pacific/Honolulu",
'-570' => "Pacific/Marquesas",
'-540' => "America/Anchorage",
'-480' => "America/Los_Angeles",
'-420' => "America/Denver",
'-360' => "America/Chicago",
'-300' => "America/New_York",
'-270' => "America/Caracas",
'-240' => "America/Halifax",
'-210' => "Canada/Newfoundland",
'-180' => "America/Sao_Paulo",
'-60' => "Atlantic/Azores",
'0' => "Europe/London",
'60' => "Europe/Paris",
'120' => "Europe/Helsinki",
'180' => "Europe/Moscow",
'210' => "Asia/Tehran",
'240' => "Asia/Dubai",
'300' => "Asia/Karachi",
'270' => "Asia/Kabul",
'300' => "Asia/Karachi",
'330' => "Asia/Kolkata",
'345' => "Asia/Katmandu",
'360' => "Asia/Yekaterinburg",
'390' => "Asia/Rangoon",
'420' => "Asia/Krasnoyarsk",
'480' => "Asia/Shanghai",
'525' => "Australia/Eucla",
'540' => "Asia/Tokyo",
'570' => "Australia/Adelaide",
'600' => "Australia/Melbourne",
'630' => "Australia/Lord_Howe",
'660' => "Asia/Vladivostok",
'690' => "Pacific/Norfolk",
'720' => "Pacific/Auckland",
'765' => "Pacific/Chatham",
'780' => "Pacific/Enderbury",
'840' => "Pacific/Kiritimati",
);
return $timezones[(string) intval($offset * 60)];
}
}
