gnu-social/index.php

<?php
/**
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

define('INSTALLDIR', dirname(__FILE__));
define('LACONICA', true);

require_once INSTALLDIR . '/lib/common.php';

// get and cache current user

$user = common_current_user();

// initialize language env

common_init_language();

$action = $_REQUEST['action'];

if (!$action || !preg_match('/^[a-zA-Z0-9_-]*$/', $action)) {
    common_redirect(common_local_url('public'));
}

// If the site is private, and they're not on one of the "public"
// parts of the site, redirect to login

if (!$user && common_config('site', 'private') &&
    !in_array($action, array('login', 'openidlogin', 'finishopenidlogin',
                             'recoverpassword', 'api', 'doc', 'register'))) {
    common_redirect(common_local_url('login'));
}

$actionfile = INSTALLDIR."/actions/$action.php";

if (!file_exists($actionfile)) {
    $cac = new ClientErrorAction();
    $cac->handle(array('code' => 404,
                       'message' => _('Unknown action')));
} else {

    include_once $actionfile;

    $action_class = ucfirst($action).'Action';

    $action_obj = new $action_class();

    if ($config['db']['mirror'] && $action_obj->isReadOnly()) {
        if (is_array($config['db']['mirror'])) {
            // "load balancing", ha ha
            $k = array_rand($config['db']['mirror']);

            $mirror = $config['db']['mirror'][$k];
        } else {
            $mirror = $config['db']['mirror'];
        }
        $config['db']['database'] = $mirror;
    }

    try {
        if ($action_obj->prepare($_REQUEST)) {
            $action_obj->handle($_REQUEST);
        }
    } catch (ClientException cex) {
        $cac = new ClientErrorAction();
        $cac->handle(array('code' => $cex->code,
                           'message' => $cex->message));
    } catch (ServerException sex) { // snort snort guffaw
        $sac = new ServerErrorAction();
        $sac->handle(array('code' => $sex->code,
                           'message' => $sex->message));
    } catch (Exception ex) {
        $sac = new ServerErrorAction();
        $sac->handle(array('code' => 500,
                           'message' => $ex->message));
    }
}