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init.php
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init.php
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<?php
/**
*
* @package mahara
* @subpackage core
* @author Catalyst IT Ltd
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL version 3 or later
* @copyright For copyright information on Mahara, please see the README file distributed with this software.
*
*/
defined('INTERNAL') || die();
if (defined('CLI') && php_sapi_name() != 'cli') {
die();
}
$CFG = new StdClass;
$CFG->docroot = dirname(__FILE__) . DIRECTORY_SEPARATOR;
//array containing site options from database that are overrided by $CFG
$OVERRIDDEN = array();
$CFG->libroot = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'lib' . DIRECTORY_SEPARATOR;
set_include_path($CFG->libroot . PATH_SEPARATOR . $CFG->libroot . 'pear/' . PATH_SEPARATOR . get_include_path());
// Set up error handling
require('errors.php');
if (!is_readable($CFG->docroot . 'config.php')) {
// @todo Later, this will redirect to the installer script. For now, we
// just log and exit.
log_environ('Not installed! Please create config.php from config-dist.php');
exit;
}
init_performance_info();
require($CFG->docroot . 'config.php');
$CFG = (object)array_merge((array)$cfg, (array)$CFG);
require_once('config-defaults.php');
$CFG = (object)array_merge((array)$cfg, (array)$CFG);
// xmldb stuff
$CFG->xmldbdisablenextprevchecking = true;
$CFG->xmldbdisablecommentchecking = true;
// ensure directorypermissions is set
if (empty($CFG->directorypermissions)) {
$CFG->directorypermissions = 0700;
}
$CFG->filepermissions = $CFG->directorypermissions & 0666;
// Check if the test mode is enabled
if (isset($CFG->behat_dataroot)) {
require_once($CFG->docroot . '/testing/frameworks/behat/classes/util.php');
if (BehatTestingUtil::is_test_site_enabled()) {
define('BEHAT_TEST', 1);
}
}
// When running behat tests or behat util CLI commnands,
// switch the $CFG->X for $CFG->behat_X.
if (defined('BEHAT_UTIL') || defined('BEHAT_TEST')) {
if (empty($CFG->behat_wwwroot) || empty($CFG->behat_dataroot) || empty($CFG->behat_dbprefix)) {
log_debug('Behat tests cannot run unless $cfg->behat_wwwroot, $cfg->behat_dataroot, and $cfg->behat_dbprefix are defined in config.php');
die(1);
}
// Now we can begin switching $CFG->X for $CFG->behat_X.
// Keep the origin settings for validating only
$CFG->wwwroot_orig = isset($CFG->wwwroot) ? $CFG->wwwroot : null;
$CFG->dataroot_orig = isset($CFG->dataroot) ? $CFG->dataroot : null;
$CFG->dbprefix_orig = isset($CFG->dbprefix) ? $CFG->dbprefix : null;
$CFG->wwwroot = $CFG->behat_wwwroot;
$CFG->dataroot = $CFG->behat_dataroot;
$CFG->dbprefix = $CFG->behat_dbprefix;
}
// Fix up paths in $CFG
foreach (array('docroot', 'dataroot') as $path) {
$CFG->{$path} = (substr($CFG->{$path}, -1) != DIRECTORY_SEPARATOR) ? $CFG->{$path} . DIRECTORY_SEPARATOR : $CFG->{$path};
}
// Set default configs that are dependent on the docroot and dataroot
if (empty($CFG->sessionpath)) {
$CFG->sessionpath = $CFG->dataroot . 'sessions';
}
// Now that we've loaded the configs, we can override the default error settings
// from errors.php
$errorlevel = $CFG->error_reporting;
error_reporting($errorlevel);
set_error_handler('error', $errorlevel);
// core libraries
require('mahara.php');
ensure_sanity();
// Now that we know json_decode exists we check if any config vars are
// encoded json strings and we convert them to be used in php
foreach ($CFG as $key => $option) {
if (is_string($option)) {
$decode = json_decode($option, true);
if ($decode !== null && is_array($decode) && json_last_error() === JSON_ERROR_NONE) {
$CFG->$key = $decode;
}
}
}
require('dml.php');
require('web.php');
require('user.php');
require('manualhelp.php');
// Optional local/lib.php file
$locallib = get_config('docroot') . 'local/lib.php';
if (file_exists($locallib)) {
require($locallib);
}
// Database access functions
require('adodb/adodb-exceptions.inc.php');
require('adodb/adodb.inc.php');
try {
// ADODB does not provide the raw driver error message if the connection
// fails for some reason, so we use output buffering to catch whatever
// the error is instead.
ob_start();
// Transform $CFG->dbtype into the name of the ADODB driver we will use
if (is_postgres()) {
$CFG->dbtype = 'postgres';
}
else if (is_mysql()) {
// If they have mysqli, use it. Otherwise, fall back to the older "mysql" extension.
if (extension_loaded('mysqli')) {
$CFG->dbtype = 'mysqli';
}
else {
// mysql
throw new ConfigSanityException(get_string('mysqlmodulenolongersupported1', 'error'));
}
}
$db = ADONewConnection($CFG->dbtype);
if (empty($CFG->dbhost)) {
$CFG->dbhost = '';
}
// The ADODB connection function doesn't have a separate port argument, but the
// postgres, mysql, and mysqli drivers all support a $this->dbport field.
if (!empty($CFG->dbport)) {
$db->port = $CFG->dbport;
}
if (!empty($CFG->dbpersist)) { // Use persistent connection (default)
$dbconnected = $db->PConnect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
}
else { // Use single connection
$dbconnected = $db->Connect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
}
// Now we have a connection, verify the server is a new enough version
$dbversion = $db->ServerInfo();
if (is_postgres()) {
$okversion = '8.3';
$dbfriendlyname = 'PostgreSQL';
}
else if (is_mysql()) {
$okversion = '5.0.25';
$dbfriendlyname = 'MySQL';
}
if (floatval($dbversion['version']) < floatval($okversion)) {
throw new ConfigSanityException(get_string('dbversioncheckfailed', 'error', $dbfriendlyname, $dbversion['version'], $okversion));
}
$db->SetFetchMode(ADODB_FETCH_ASSOC);
configure_dbconnection();
ensure_internal_plugins_exist();
ob_end_clean();
}
catch (Exception $e) {
if ($e instanceof ConfigSanityException) {
throw $e;
}
$errormessage = ob_get_contents();
if (!$errormessage) {
$errormessage = $e->getMessage();
}
ob_end_clean();
$errormessage = get_string('dbconnfailed', 'error') . $errormessage;
throw new ConfigSanityException($errormessage);
}
try {
db_ignore_sql_exceptions(true);
load_config();
db_ignore_sql_exceptions(false);
}
catch (SQLException $e) {
db_ignore_sql_exceptions(false);
}
// Make sure wwwroot is set and available, either in the database or in the
// config file. Cron requires it when sending out forums emails.
if (!isset($CFG->wwwroot) && isset($_SERVER['HTTP_HOST'])) {
$proto = (isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') ? 'https://' : 'http://';
$host = (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $_SERVER['HTTP_HOST'];
if (false !== strpos($host, ',')) {
list($host) = explode(',', $host);
$host = trim($host);
}
$path = '';
if (strpos(dirname(__FILE__), strlen($_SERVER['DOCUMENT_ROOT'])) === 0) {
$path = substr(dirname(__FILE__), strlen($_SERVER['DOCUMENT_ROOT']));
}
else {
$self = explode('/', $_SERVER['PHP_SELF']);
$dir = dirname(__FILE__);
$i = 0;
while (realpath($_SERVER['DOCUMENT_ROOT'].$path) != $dir) {
if ($i >= count($self) - 1) {
$path = '';
break;
}
if (empty($self[$i])) {
$i ++;
continue;
}
$path .= '/'.$self[$i];
$i ++;
}
}
if ($path) {
$path = str_replace('\\', '/', $path); // windows
if (substr($path, 0, 1) != '/') {
$path = '/' . $path;
}
$path .= '/';
} else {
$path = '/';
}
$wwwroot = $proto . $host . $path;
try {
set_config('wwwroot', $wwwroot);
}
catch (Exception $e) {
// Just set it directly. The system will most likely not be installed, so we don't care
$CFG->wwwroot = $wwwroot;
}
}
if (isset($CFG->wwwroot)) {
if (substr($CFG->wwwroot, -1, 1) != '/') {
$CFG->wwwroot .= '/';
}
}
// Start up a session object, in case we need to use it to print messages
require_once('auth/session.php');
$SESSION = Session::singleton();
// If we have cleanurl subdomains turned on, we need to set cookiedomain
// to ensure cookies are given back to us in all subdomains
if (isset($CFG->cleanurls) && isset($CFG->cleanurlusersubdomains) && !isset($CFG->cookiedomain)) {
$url = parse_url(get_config('wwwroot'));
$CFG->cookiedomain = '.' . $url['host'];
}
// Refreshing the Session cookie response settings now that we know the final value of
// $CFG->wwwroot and $CFG->cookiedomain.
Session::setup_response_settings();
// If we're forcing an ssl proxy, make sure the wwwroot is correct
if ($CFG->sslproxy == true && parse_url($CFG->wwwroot, PHP_URL_SCHEME) !== 'https') {
throw new ConfigSanityException(get_string('wwwrootnothttps', 'error', get_config('wwwroot')));
}
// Make sure that we are using ssl if wwwroot expects us to do so
if ($CFG->sslproxy === false && isset($_SERVER['REMOTE_ADDR']) && (!isset($_SERVER['HTTPS']) || strtolower($_SERVER['HTTPS']) == 'off') &&
parse_url($CFG->wwwroot, PHP_URL_SCHEME) === 'https'){
redirect(get_relative_script_path());
}
if (!isset($CFG->noreplyaddress) && isset($CFG->wwwroot)) {
$noreplyaddress = 'noreply@' . parse_url($CFG->wwwroot, PHP_URL_HOST);
try {
set_config('noreplyaddress', $noreplyaddress);
}
catch (Exception $e) {
// Do nothing again, same reason as above
$CFG->noreplyaddress = $noreplyaddress;
}
}
if (!get_config('theme')) {
// if it's not set, we're probably not installed,
// so set it in $CFG directly rather than the db which doesn't yet exist
$CFG->theme = 'raw';
}
if (defined('INSTALLER')) {
// Custom themes sometimes cause upgrades to fail.
$CFG->theme = 'raw';
}
// Make sure the search plugin is configured
if (!get_config('searchplugin')) {
try {
set_config('searchplugin', 'internal');
}
catch (Exception $e) {
$CFG->searchplugin = 'internal';
}
}
$bcrypt_cost = get_config('bcrypt_cost');
// bcrypt_cost is the cost parameter passed as part of the bcrypt hash
// See http://php.net/manual/en/function.crypt.php
// The value is a 2 digit number in the range of 04-31
if (!$bcrypt_cost || !is_int($bcrypt_cost) || $bcrypt_cost < 4 || $bcrypt_cost > 31) {
$bcrypt_cost = 12;
}
$CFG->bcrypt_cost = sprintf('%02d', $bcrypt_cost);
if (!get_config('productionmode')) {
$CFG->log_dbg_targets = LOG_TARGET_SCREEN | LOG_TARGET_ERRORLOG;
$CFG->log_info_targets = LOG_TARGET_SCREEN | LOG_TARGET_ERRORLOG;
$CFG->log_warn_targets = LOG_TARGET_SCREEN | LOG_TARGET_ERRORLOG;
$CFG->log_environ_targets = LOG_TARGET_SCREEN | LOG_TARGET_ERRORLOG;
$CFG->developermode = DEVMODE_DEBUGCSS | DEVMODE_UNPACKEDJS;
$CFG->perftofoot = true;
$CFG->nocache = true;
if ($CFG->log_backtrace_print_args === null) {
$CFG->log_backtrace_print_args = true;
}
}
if (get_config('installed')) {
// Check whether core upgrades need to be done. If so, "close" the site
// from logins
require(get_config('libroot') . 'version.php');
$upgradeavailable = $config->version > get_config('version');
if ($upgradeavailable) {
ensure_upgrade_sanity();
}
else if ($config->version < get_config('version')) {
if (get_config('productionmode')) {
throw new ConfigSanityException("Database version of Mahara $corerelease ($coreversion) is newer "
. "than files version $config->release ($config->version). "
. "Please make sure you have the correct Mahara files in place.");
}
else {
define('SITEOUTOFSYNC', 'core');
}
}
if ($upgradeavailable != get_config('siteclosedforupgrade')) {
set_config('siteclosedforupgrade', $upgradeavailable);
}
}
// If we're in the middle of an upgrade, quit the cron now.
$siteclosedforupgrade = get_config('siteclosedforupgrade');
if ($siteclosedforupgrade && (defined('CRON') || (defined('CLI') && !defined('INSTALLER')))) {
exit("Site closed for upgrade.\n");
}
if (!defined('CLI')) {
header('Content-type: text/html; charset=UTF-8');
// Ensure that, by default, the response is not cached
header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
header('Expires: '. gmdate('D, d M Y H:i:s', 507686400) .' GMT');
header('Pragma: no-cache');
// Security headers. See https://www.owasp.org/index.php/List_of_useful_HTTP_headers
header('X-Frame-Options: SAMEORIGIN');
header('X-XSS-Protection: 1; mode=block');
header('X-Content-Type-Options: nosniff');
header('X-Permitted-Cross-Domain-Policies: master-only');
if (is_https()) {
header('Strict-Transport-Security: max-age=63072000');
}
// Don't print precise PHP version as an HTTP header
header_remove('x-powered-by');
}
// Only do authentication once we know the page theme, so that the login form
// can have the correct theming.
require_once('auth/lib.php');
$USER = new LiveUser();
if (function_exists('local_init_user')) {
local_init_user();
}
// try to set the theme, or catch the thrown exception (eg if the name is invalid)
try {
$THEME = new Theme($USER);
} catch (SystemException $exception) {
// set the theme to 'default' and put up an error message
$THEME = new Theme('raw');
$SESSION->add_error_msg($exception->getMessage());
}
// The installer does its own auth_setup checking, because some upgrades may
// break logging in and so need to allow no logins.
// Command-line scripts obviously have no logged-in user.
if (!defined('INSTALLER') && !defined('CLI') && !defined('CRON')) {
auth_setup();
}
// Force the user to log out if:
// - the site is closed by the system due to a pending upgrade
// - the site was closed by an admin (and the user is not an admin)
if ($siteclosedforupgrade || (get_config('siteclosedbyadmin') && !$USER->admin)) {
if ($USER->is_logged_in()) {
$USER->logout();
}
if (defined('CLI') && !defined('INSTALLER')) {
exit("Site closed.\n");
}
if (!defined('HOME') && !defined('INSTALLER') && !defined('IGNOREMAINTENANCE')) {
redirect();
}
}
// check to see if we're installed...
if (!get_config('installed')) {
ensure_install_sanity();
if (defined('TESTSRUNNING')) {
die("Need to have Mahara installed before phpunit tests will run. Please install via 'php htdocs/admin/cli/install.php'");
}
$scriptfilename = str_replace('\\', '/', $_SERVER['SCRIPT_FILENAME']);
if (!defined('CLI')
&& false === strpos($scriptfilename, 'admin/index.php')
&& false === strpos($scriptfilename, 'admin/upgrade.php')
&& false === strpos($scriptfilename, 'admin/upgrade.json.php')
&& false === strpos($scriptfilename, 'admin/cli/install.php')
&& false === strpos($scriptfilename, 'admin/cli/upgrade.php')) {
redirect('/admin/index.php');
}
}
if (defined('JSON') && !defined('NOSESSKEY')) {
$sesskey = param_variable('sesskey', null);
global $USER;
if ($sesskey === null || $USER->get('sesskey') != $sesskey) {
$USER->logout();
json_reply('global', get_string('invalidsesskey'), 1);
}
}
$mobile_detection_done = $SESSION->get('mobile_detection');
// Device detection
if (!$mobile_detection_done) {
if (get_config('installed') && get_account_preference($USER->get('id'), 'devicedetection')) {
require_once(get_config('libroot') . 'mobile_detect/Mobile_Detect.php');
$detect = new Mobile_Detect();
$isMobile = $detect->isMobile();
$isTablet = $detect->isTablet();
$SESSION->set('handheld_device', $isMobile);
$SESSION->set('mobile', $isTablet ? false : $isMobile);
$SESSION->set('tablet', $isTablet);
}
else {
$SESSION->set('handheld_device', false);
$SESSION->set('mobile', false);
$SESSION->set('tablet', false);
}
$SESSION->set('mobile_detection', true);
}
// Run modules bootstrap code.
if (!defined('INSTALLER')) {
// make sure the table exists if upgrading from older version
require_once('ddl.php');
if (table_exists(new XMLDBTable('module_installed'))) {
if ($plugins = plugins_installed('module')) {
foreach ($plugins as &$plugin) {
if (safe_require_plugin('module', $plugin->name)) {
call_static_method(generate_class_name('module', $plugin->name), 'bootstrap');
}
}
}
}
}
if (get_config('disableexternalresources')) {
$CFG->wwwhost = parse_url($CFG->wwwroot, PHP_URL_HOST);
}
// Ensure that externalfilesystem is configured correctly.
if (get_config('externalfilesystem')) {
if (empty($CFG->externalfilesystem['includefilepath']) || empty($CFG->externalfilesystem['class'])) {
throw new ConfigSanityException('externalfilesystem configuration detected but the settings are invalid');
}
if (!file_exists($CFG->docroot . '/' . $CFG->externalfilesystem['includefilepath'])) {
throw new ConfigSanityException('externalfilesystem is configured, but file ' . $CFG->externalfilesystem['includefilepath'] . ' does not exist');
}
require_once($CFG->docroot . '/' . $CFG->externalfilesystem['includefilepath']);
if (!class_exists($CFG->externalfilesystem['class'])) {
throw new ConfigSanityException('externalfilesystem is configured, but class ' . $CFG->externalfilesystem['class'] . ' does not exist');
}
if (!is_subclass_of($CFG->externalfilesystem['class'], 'external_file_system')) {
throw new ConfigSanityException('externalfilesystem is configured, but ' . $CFG->externalfilesystem['class'] . ' class does not implement external_file_system interface');
}
}
/*
* Initializes our performance info early.
*
* Pairs up with get_performance_info() which is actually
* in lib/mahara.php. This function is here so that we can
* call it before all the libs are pulled in.
*
* @uses $PERF
*/
function init_performance_info() {
global $PERF;
$PERF = new StdClass;
$PERF->dbreads = $PERF->dbwrites = $PERF->dbcached = 0;
$PERF->logwrites = 0;
if (function_exists('microtime')) {
$PERF->starttime = microtime();
}
if (function_exists('memory_get_usage')) {
$PERF->startmemory = memory_get_usage();
}
if (function_exists('posix_times')) {
$PERF->startposixtimes = posix_times();
}
}