gnu-social/public/index.php

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social 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.
//
// GNU social 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 GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* Main GNU social entry point
*
* @package GNUsocial
* @author Brenda Wallace <shiny@cpan.org>
* @author Brion Vibber <brion@pobox.com>
* @author Brion Vibber <brion@status.net>
* @author Christopher Vollick <candrews@integralblue.com>
* @author CiaranG <ciaran@ciarang.com>
* @author Craig Andrews <candrews@integralblue.com>
* @author Craig Andrews <evan@status.net>
* @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 James Walker <walkah@walkah.net>
* @author Jeffery To <candrews@integralblue.com>
* @author Jeffery To <jeffery.to@gmail.com>
* @author Mikael Nordfeldth <mmn@hethane.se>
* @author Mike Cochrane <mikec@mikenz.geek.nz>
* @author Robin Millette <millette@controlyourself.ca>
* @author Sarven Capadisli <csarven@controlyourself.ca>
* @author Sarven Capadisli <csarven@status.net>
* @author Siebrand Mazeland <s.mazeland@xs4all.nl>
* @author Tom Adams <candrews@integralblue.com>
* @author Tom Adams <tom@holizz.com>
* @author Zach Copley <zach@status.net>
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
$_startTime = microtime(true);
$_startCpuTime = hrtime(true);
$_perfCounters = [];
// We provide all our dependencies through our own autoload.
// This will probably be configurable for distributing with
// system packages (like with Debian apt etc. where included
// libraries are maintained through repositories)
set_include_path('.'); // mainly fixes an issue where /usr/share/{pear,php*}/DB/DataObject.php is _old_ on various systems...
define('INSTALLDIR', dirname(__DIR__));
define('PUBLICDIR', INSTALLDIR . DIRECTORY_SEPARATOR . 'public');
define('GNUSOCIAL', true);
define('STATUSNET', true); // compatibility
$user = null;
$action = null;
function getPath($req)
{
$p = null;
if ((common_config('site', 'fancy') || !array_key_exists('PATH_INFO', $_SERVER))
&& array_key_exists('p', $req)
) {
$p = $req['p'];
} elseif (array_key_exists('PATH_INFO', $_SERVER)) {
$path = $_SERVER['PATH_INFO'];
$script = $_SERVER['SCRIPT_NAME'];
if (substr($path, 0, mb_strlen($script)) == $script) {
$p = substr($path, mb_strlen($script) + 1);
} else {
$p = $path;
}
} else {
$p = null;
}
// Trim all initial '/'
$p = ltrim($p, '/');
return $p;
}
/**
* logs and then displays error messages
*
* @return void
*/
function handleError($error)
{
try {
if ($error->getCode() == DB_DATAOBJECT_ERROR_NODATA) {
return;
}
$logmsg = "Exception thrown: " . _ve($error->getMessage());
if ($error instanceof PEAR_Exception && common_config('log', 'debugtrace')) {
$logmsg .= " PEAR: ". $error->toText();
}
// DB queries often end up with a lot of newlines; merge to a single line
// for easier grepability...
$logmsg = str_replace("\n", " ", $logmsg);
common_log(LOG_ERR, $logmsg);
// @fixme backtrace output should be consistent with exception handling
if (common_config('log', 'debugtrace')) {
$bt = $error->getTrace();
foreach ($bt as $n => $line) {
common_log(LOG_ERR, formatBacktraceLine($n, $line));
}
}
if ($error instanceof DB_DataObject_Error
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|| $error instanceof MDB2_Error
|| ($error instanceof PEAR_Exception && $error->getCode() == -24)
) {
//If we run into a DB error, assume we can't connect to the DB at all
//so set the current user to null, so we don't try to access the DB
//while rendering the error page.
global $_cur;
$_cur = null;
$msg = sprintf(
// TRANS: Database error message.
_('The database for %1$s is not responding correctly, '.
'so the site will not work properly. '.
'The site admins probably know about the problem, '.
'but you can contact them at %2$s to make sure. '.
'Otherwise, wait a few minutes and try again.'
),
common_config('site', 'name'),
common_config('site', 'email')
);
$erraction = new DBErrorAction($msg, 500);
} elseif ($error instanceof ClientException) {
$erraction = new ClientErrorAction($error->getMessage(), $error->getCode());
} elseif ($error instanceof ServerException) {
$erraction = new ServerErrorAction($error->getMessage(), $error->getCode(), $error);
} else {
// If it wasn't specified more closely which kind of exception it was
$erraction = new ServerErrorAction($error->getMessage(), 500, $error);
}
$erraction->showPage();
} catch (Exception $e) {
// TRANS: Error message.
echo _('An error occurred.');
error_log('Uncaught Exception: ' . $error);
exit(-1);
}
exit(-1);
}
set_exception_handler('handleError');
// quick check for fancy URL auto-detection support in installer.
if (preg_replace("/\?.+$/", "", $_SERVER['REQUEST_URI']) === preg_replace("/^\/$/", "", (dirname($_SERVER['REQUEST_URI']))) . '/check-fancy') {
die("Fancy URL support detection succeeded. We suggest you enable this to get fancy (pretty) URLs.");
}
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require_once INSTALLDIR . '/lib/util/common.php';
/**
* Format a backtrace line for debug output roughly like debug_print_backtrace() does.
* Exceptions already have this built in, but PEAR error objects just give us the array.
*
* @param int $n line number
* @param array $line per-frame array item from debug_backtrace()
* @return string
*/
function formatBacktraceLine($n, $line)
{
$out = "#$n ";
if (array_key_exists('class', $line)) {
$out .= $line['class'];
}
if (array_key_exists('type', $line)) {
$out .= $line['type'];
}
if (array_key_exists('function', $line)) {
$out .= $line['function'];
}
$out .= '(';
if (array_key_exists('args', $line)) {
$args = [];
foreach ($line['args'] as $arg) {
// debug_print_backtrace seems to use var_export
// but this gets *very* verbose!
$args[] = gettype($arg);
}
$out .= implode(',', $args);
}
$out .= ')';
$out .= ' called at [';
if (array_key_exists('file', $line)) {
$out .= $line['file'];
}
if (array_key_exists('line', $line)) {
$out .= ':' . $line['line'];
}
$out .= ']';
return $out;
}
function setupRW()
{
global $config;
static $alwaysRW = array('session', 'remember_me');
$rwdb = $config['db']['database'];
if (Event::handle('StartReadWriteTables', array(&$alwaysRW, &$rwdb))) {
// We ensure that these tables always are used
// on the master DB
$config['db']['database_rw'] = $rwdb;
$config['db']['ini_rw'] = INSTALLDIR.'/classes/statusnet.ini';
foreach ($alwaysRW as $table) {
$config['db']['table_'.$table] = 'rw';
}
Event::handle('EndReadWriteTables', array($alwaysRW, $rwdb));
}
return;
}
function isLoginAction($action)
{
static $loginActions = array('login', 'recoverpassword', 'api', 'doc', 'register', 'publicxrds', 'otp', 'opensearch', 'rsd');
$login = null;
if (Event::handle('LoginAction', array($action, &$login))) {
$login = in_array($action, $loginActions);
}
return $login;
}
function main()
{
global $user, $action;
if (!_have_config()) {
$msg = sprintf(
// TRANS: Error message displayed when there is no StatusNet configuration file.
_("No configuration file found. Try running ".
"the installation program first."
)
);
$sac = new ServerErrorAction($msg);
$sac->showPage();
return;
}
// Make sure RW database is setup
setupRW();
// XXX: we need a little more structure in this script
// get and cache current user (may hit RW!)
$user = common_current_user();
// initialize language env
common_init_language();
$path = getPath($_REQUEST);
$r = Router::get();
$args = $r->map($path);
// If the request is HTTP and it should be HTTPS...
if (GNUsocial::useHTTPS() && !GNUsocial::isHTTPS()) {
common_redirect(common_local_url($args['action'], $args));
}
$args = array_merge($args, $_REQUEST ?: []);
Event::handle('ArgsInitialize', array(&$args));
$action = basename($args['action']);
if (!$action || !preg_match('/^[a-zA-Z0-9_-]*$/', $action)) {
common_redirect(common_local_url('public'));
}
// If the site is private, and they're not on one of the "public"
// parts of the site, redirect to login
if (
is_null($user)
&& common_config('site', 'private')
&& !isLoginAction($action)
&& !preg_match('/rss$/', $action)
&& $action !== 'robotstxt'
&& !preg_match('/^Api/', $action)
) {
// set returnto
$rargs = common_copy_args($args);
unset($rargs['action']);
if (common_config('site', 'fancy')) {
unset($rargs['p']);
}
if (array_key_exists('submit', $rargs)) {
unset($rargs['submit']);
}
foreach (array_keys($_COOKIE) as $cookie) {
unset($rargs[$cookie]);
}
common_set_returnto(common_local_url($action, $rargs));
common_redirect(common_local_url('login'));
}
$action_class = ucfirst($action).'Action';
if (!class_exists($action_class)) {
// TRANS: Error message displayed when trying to perform an undefined action.
throw new ClientException(_('Unknown action'), 404);
}
call_user_func("$action_class::run", $args);
}
main();
// XXX: cleanup exit() calls or add an exit handler so
// this always gets called
Event::handle('CleanupModule');
Event::handle('CleanupPlugin');