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<?php
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/**
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 * StatusNet - the distributed open-source microblogging tool
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 * Copyright (C) 2008, 2009, StatusNet, Inc.
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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 Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
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 *
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 * 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.
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 *
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 * 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/>.
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 *
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 * @category StatusNet
 * @package  StatusNet
 * @license  GNU Affero General Public License http://www.gnu.org/licenses/
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 * @author   Brenda Wallace <shiny@cpan.org> 
 * @author   Christopher Vollick <psycotica0@gmail.com> 
 * @author   CiaranG <ciaran@ciarang.com>
 * @author   Craig Andrews <candrews@integralblue.com> 
 * @author   Evan Prodromou <evan@controlezvous.ca>
 * @author   Evan Prodromou <evan@controlyourself.ca> 
 * @author   Evan Prodromou <evan@prodromou.name>
 * @author   Evan Prodromou <evan@status.net>
 * @author   Gina Haeussge <osd@foosel.net> 
 * @author   Jeffery To <jeffery.to@gmail.com>
 * @author   Mike Cochrane <mikec@mikenz.geek.nz>
 * @author   Robin Millette <millette@controlyourself.ca>
 * @author   Sarven Capadisli <csarven@controlyourself.ca> 
 * @author   Tom Adams <tom@holizz.com>
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 */
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define('INSTALLDIR', dirname(__FILE__));
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define('STATUSNET', true);
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define('LACONICA', true); // compatibility
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require_once INSTALLDIR . '/lib/common.php';
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$user = null;
$action = null;

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function getPath($req)
{
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    if ((common_config('site', 'fancy') || !array_key_exists('PATH_INFO', $_SERVER))
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        && array_key_exists('p', $req)
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    ) {
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        return $req['p'];
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    } else if (array_key_exists('PATH_INFO', $_SERVER)) {
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        return $_SERVER['PATH_INFO'];
    } else {
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        return null;
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    }
}
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function handleError($error)
{
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    if ($error->getCode() == DB_DATAOBJECT_ERROR_NODATA) {
        return;
    }

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    $logmsg = "PEAR error: " . $error->getMessage();
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    if (common_config('site', 'logdebug')) {
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        $logmsg .= " : ". $error->getDebugInfo();
    }
    common_log(LOG_ERR, $logmsg);
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    if (common_config('site', 'logdebug')) {
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        $bt = $error->getBacktrace();
        foreach ($bt as $line) {
            common_log(LOG_ERR, $line);
        }
    }
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    if ($error instanceof DB_DataObject_Error
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        || $error instanceof DB_Error
    ) {
        $msg = sprintf(
            _(
                'The database for %s isn\'t responding correctly, '.
                'so the site won\'t work properly. '.
                'The site admins probably know about the problem, '.
                'but you can contact them at %s to make sure. '.
                'Otherwise, wait a few minutes and try again.'
            ),
            common_config('site', 'name'),
            common_config('site', 'email')
        );
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    } else {
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        $msg = _(
            'An important error occured, probably related to email setup. '.
            'Check logfiles for more info..'
        );
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    }
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    $dac = new DBErrorAction($msg, 500);
    $dac->showPage();
    exit(-1);
}
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function checkMirror($action_obj, $args)
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{
    global $config;

    static $alwaysRW = array('session', 'remember_me');

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

        // We ensure that these tables always are used
        // on the master DB

        $config['db']['database_rw'] = $config['db']['database'];
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        $config['db']['ini_rw'] = INSTALLDIR.'/classes/statusnet.ini';
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        foreach ($alwaysRW as $table) {
            $config['db']['table_'.$table] = 'rw';
        }

        // everyone else uses the mirror

        $config['db']['database'] = $mirror;
    }
}

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function isLoginAction($action)
{
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    static $loginActions =  array('login', 'recoverpassword', 'api', 'doc', 'register');
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    $login = null;

    if (Event::handle('LoginAction', array($action, &$login))) {
        $login = in_array($action, $loginActions);
    }

    return $login;
}

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function main()
{
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    // fake HTTP redirects using lighttpd's 404 redirects
    if (strpos($_SERVER['SERVER_SOFTWARE'], 'lighttpd') !== false) {
        $_lighty_url = $base_url.$_SERVER['REQUEST_URI'];
        $_lighty_url = @parse_url($_lighty_url);

        if ($_lighty_url['path'] != '/index.php' && $_lighty_url['path'] != '/') {
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            $_lighty_path = preg_replace('/^'.preg_quote(common_config('site', 'path')).'\//', '', substr($_lighty_url['path'], 1));
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            $_SERVER['QUERY_STRING'] = 'p='.$_lighty_path;
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            if ($_lighty_url['query']) {
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                $_SERVER['QUERY_STRING'] .= '&'.$_lighty_url['query'];
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            }
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            parse_str($_lighty_url['query'], $_lighty_query);
            foreach ($_lighty_query as $key => $val) {
                $_GET[$key] = $_REQUEST[$key] = $val;
            }
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            $_GET['p'] = $_REQUEST['p'] = $_lighty_path;
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        }
    }
    $_SERVER['REDIRECT_URL'] = preg_replace("/\?.+$/", "", $_SERVER['REQUEST_URI']);

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    // quick check for fancy URL auto-detection support in installer.
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    if (isset($_SERVER['REDIRECT_URL']) && (preg_replace("/^\/$/", "", (dirname($_SERVER['REQUEST_URI']))) . '/check-fancy') === $_SERVER['REDIRECT_URL']) {
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        die("Fancy URL support detection succeeded. We suggest you enable this to get fancy (pretty) URLs.");
    }
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    global $user, $action;
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    Snapshot::check();
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    if (!_have_config()) {
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        $msg = sprintf(
            _(
                "No configuration file found. Try running ".
                "the installation program first."
            )
        );
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        $sac = new ServerErrorAction($msg);
        $sac->showPage();
        return;
    }

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    // For database errors

    PEAR::setErrorHandling(PEAR_ERROR_CALLBACK, 'handleError');

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    // XXX: we need a little more structure in this script
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    // get and cache current user
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    $user = common_current_user();
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    // initialize language env
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    common_init_language();
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    $path = getPath($_REQUEST);

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    $r = Router::get();
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    $args = $r->map($path);
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    if (!$args) {
        $cac = new ClientErrorAction(_('Unknown page'), 404);
        $cac->showPage();
        return;
    }
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    $args = array_merge($args, $_REQUEST);
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    Event::handle('ArgsInitialize', array(&$args));
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    $action = $args['action'];
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    if (!$action || !preg_match('/^[a-zA-Z0-9_-]*$/', $action)) {
        common_redirect(common_local_url('public'));
        return;
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    }
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    // If the site is private, and they're not on one of the "public"
    // parts of the site, redirect to login

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    if (!$user && common_config('site', 'private')
        && !isLoginAction($action)
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        && !preg_match('/rss$/', $action)
    ) {
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        common_redirect(common_local_url('login'));
        return;
    }

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

    if (!class_exists($action_class)) {
        $cac = new ClientErrorAction(_('Unknown action'), 404);
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        $cac->showPage();
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    } else {
        $action_obj = new $action_class();

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        checkMirror($action_obj, $args);
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        try {
            if ($action_obj->prepare($args)) {
                $action_obj->handle($args);
            }
        } catch (ClientException $cex) {
            $cac = new ClientErrorAction($cex->getMessage(), $cex->getCode());
            $cac->showPage();
        } catch (ServerException $sex) { // snort snort guffaw
            $sac = new ServerErrorAction($sex->getMessage(), $sex->getCode());
            $sac->showPage();
        } catch (Exception $ex) {
            $sac = new ServerErrorAction($ex->getMessage());
            $sac->showPage();
        }
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    }
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}
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main();

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// XXX: cleanup exit() calls or add an exit handler so
// this always gets called

Event::handle('CleanupPlugin');