init.php 6.8 KB
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<?php
/**
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 * This program is part of Mahara
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 *
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 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 *
 * @package    mahara
 * @subpackage core
 * @author     Penny Leach <penny@catalyst.net.nz>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL
 * @copyright  (C) 2006,2007 Catalyst IT Ltd http://catalyst.net.nz
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 *
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 */

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defined('INTERNAL') || die();

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$CFG = new StdClass;
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$CFG->docroot = dirname(__FILE__) . '/';
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// Figure out our include path
if (!empty($_SERVER['MAHARA_LIBDIR'])) {
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    $CFG->libroot = $_SERVER['MAHARA_LIBDIR'];
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}
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else {
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    $CFG->libroot = dirname(__FILE__) . '/lib/';
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}
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set_include_path($CFG->libroot . PATH_SEPARATOR . $CFG->libroot . 'pear/');
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// Set up error handling
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require('errors.php');
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if (!is_readable($CFG->docroot . 'config.php')) {
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    // @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;
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}

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init_performance_info();

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require('config.php');
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$CFG = (object)array_merge((array)$cfg, (array)$CFG);
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// Fix up paths in $CFG
foreach (array('docroot', 'dataroot') as $path) {
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    $CFG->{$path} = (substr($CFG->{$path}, -1) != DIRECTORY_SEPARATOR) ? $CFG->{$path} . DIRECTORY_SEPARATOR : $CFG->{$path};
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}

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// xmldb stuff
$CFG->xmldbdisablenextprevchecking = true;
$CFG->xmldbdisablecommentchecking = true;

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// core libraries
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require('mahara.php');
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ensure_sanity();
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require('dml.php');
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require('ddl.php');
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require('constants.php');
require('web.php');
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require('activity.php');
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require('user.php');
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// Database access functions
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require('adodb/adodb-exceptions.inc.php');
require('adodb/adodb.inc.php');
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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();
    
    $db = &ADONewConnection($CFG->dbtype);
    if (!empty($CFG->dbport)) {
        $CFG->dbhost .= ':'.$CFG->dbport;
    }
    if (!empty($CFG->dbpersist)) {    // Use persistent connection (default)
        $dbconnected = $db->PConnect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
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    } 
    else {                                                     // Use single connection
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        $dbconnected = $db->Connect($CFG->dbhost,$CFG->dbuser,$CFG->dbpass,$CFG->dbname);
    }
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    $db->SetFetchMode(ADODB_FETCH_ASSOC);
    configure_dbconnection();
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    ensure_internal_plugins_exist();
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    ob_end_clean();
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}
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catch (Exception $e) {
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    $errormessage = ob_get_contents();
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    if (!$errormessage) {
        $errormessage = $e->getMessage();
    }
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    ob_end_clean();
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    $errormessage = get_string('dbconnfailed', 'error') . $errormessage;
    throw new ConfigSanityException($errormessage);
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}
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try {
    load_config();
} 
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catch (SQLException $e) {
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    if (!defined('INSTALLER')) {
        throw $e;
    }
}
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// Make sure wwwroot is set and available, either in the database or int the
// config file. Cron requires it for some purposes.
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if (!isset($CFG->wwwroot) && isset($_SERVER['HTTP_HOST'])) {
    $proto = (isset($_SERVER['HTTPS'])) ? 'https://' : 'http://';
    $host  =  (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $_SERVER['HTTP_HOST'];
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    if (false !== strpos($host, ',')) {
        list($host) = explode(',', $host);
        $host = trim($host);
    }
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    $path  = substr(dirname(__FILE__), strlen($_SERVER['DOCUMENT_ROOT']));
    if ($path) {
        $path .= '/';
    }
    $wwwroot = $proto . $host . '/' . $path;
    try {
        set_config('wwwroot', $wwwroot);
    }
    catch (Exception $e) {
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        // Just set it directly. The system will most likely not be installed, so we don't care
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        $CFG->wwwroot = $wwwroot;
    }
}
if (!isset($CFG->noreplyaddress) && isset($_SERVER['HTTP_HOST'])) {
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    $noreplyaddress = 'noreply@';
    $host  =  (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $_SERVER['HTTP_HOST'];
    if (false !== strpos($host, ',')) {
        list($host) = explode(',', $host);
        $host = trim($host);
    }
    $noreplyaddress .= $host;
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    try {
        set_config('noreplyaddress', $noreplyaddress);
    }
    catch (Exception $e) {
        // Do nothing again, same reason as above
        $CFG->noreplyaddress = $noreplyaddress;
    }
}

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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 = 'default'; 
}

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$CFG->themeurl = get_config('wwwroot') . 'theme/' . get_config('theme') . '/static/';
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header('Content-type: text/html; charset=UTF-8');

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// Only do authentication once we know the page theme, so that the login form
// can have the correct theming.
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require('auth/lib.php');
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$SESSION = new Session;
$USER    = new User($SESSION);
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// The installer does its own auth_setup checking, because some upgrades may
// break logging in and so need to allow no logins.
if (!defined('INSTALLER')) {
    auth_setup();
}
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// check to see if we're installed...
if (!get_config('installed')
    && false === strpos($_SERVER['SCRIPT_FILENAME'], 'admin/index.php')
    && false === strpos($_SERVER['SCRIPT_FILENAME'], 'admin/upgrade.php')
    && false === strpos($_SERVER['SCRIPT_FILENAME'], 'admin/upgrade.json.php')) {
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    redirect('/admin/');
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}

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if (defined('JSON')) {
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    $sesskey = param_variable('sesskey', null);
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    global $USER;
    if ($sesskey === null || $USER->get('sesskey') != $sesskey) {
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        $USER->logout();
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        json_reply('global', get_string('invalidsesskey'));
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    }
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}

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/*
 * 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->dbqueries = 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();  
    }
}

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?>