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<?php
/**
* The set up for all MediaWiki web requests.
*
* It does:
* - web-related security checks,
* - decide how and from where to load site configuration (LocalSettings.php),
* - load Setup.php.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
use MediaWiki\Context\RequestContext;
use MediaWiki\Settings\SettingsBuilder;
use Wikimedia\Http\HttpStatus;
# T17461: Make IE8 turn off content sniffing. Everybody else should ignore this
# We're adding it here so that it's *always* set, even for alternate entry
# points and when $wgOut gets disabled or overridden.
header( 'X-Content-Type-Options: nosniff' );
# Valid web server entry point, enable includes.
# Please don't move this line to includes/Defines.php. This line essentially
# defines a valid entry point. If you put it in includes/Defines.php, then
# any script that includes it becomes an entry point, thereby defeating
# its purpose.
define( 'MEDIAWIKI', true );
/**
* @param SettingsBuilder $settings
* @return never
*/
function wfWebStartNoLocalSettings( SettingsBuilder $settings ) {
# LocalSettings.php is the per-site customization file. If it does not exist
# the wiki installer needs to be launched or the generated file uploaded to
# the root wiki directory. Give a hint, if it is not readable by the server.
require_once __DIR__ . '/Output/NoLocalSettings.php';
die();
}
require_once __DIR__ . '/BootstrapHelperFunctions.php';
// If no LocalSettings file exists, try to display an error page
// (use a callback because it depends on TemplateParser)
if ( !defined( 'MW_CONFIG_CALLBACK' ) ) {
wfDetectLocalSettingsFile();
if ( !is_readable( MW_CONFIG_FILE ) ) {
define( 'MW_CONFIG_CALLBACK', 'wfWebStartNoLocalSettings' );
}
}
function wfWebStartSetup( SettingsBuilder $settings ) {
// Initialize the default MediaWiki output buffering if no buffer is already active.
// This avoids clashes with existing buffers in order to avoid problems,
// like mixing gzip and non-gzip output.
if ( ob_get_level() == 0 ) {
// During HTTP requests, MediaWiki normally buffers the response body in a string
// within OutputPage and prints it when ready. PHP buffers provide protection against
// premature sending of HTTP headers due to output from PHP warnings and notices.
// They also can be used to implement gzip support in PHP without the webserver knowing
// which requests yield HTML and which yield large files that can be streamed.
ob_start( [ MediaWiki\Output\OutputHandler::class, 'handle' ] );
}
}
// Custom setup for WebStart entry point
if ( !defined( 'MW_SETUP_CALLBACK' ) ) {
define( 'MW_SETUP_CALLBACK', 'wfWebStartSetup' );
}
require_once __DIR__ . '/Setup.php';
# Multiple DBs or commits might be used; keep the request as transactional as possible
if ( isset( $_SERVER['REQUEST_METHOD'] ) && $_SERVER['REQUEST_METHOD'] === 'POST' ) {
ignore_user_abort( true );
}
if ( !defined( 'MW_API' ) && !defined( 'MW_REST_API' ) &&
RequestContext::getMain()->getRequest()->getHeader( 'Promise-Non-Write-API-Action' )
) {
header( 'Cache-Control: no-cache' );
header( 'Content-Type: text/html; charset=utf-8' );
HttpStatus::header( 400 );
$errorHtml = wfMessage( 'nonwrite-api-promise-error' )
->useDatabase( false )
->inContentLanguage()
->escaped();
$content = <<<HTML
<!DOCTYPE html>
<html>
<head><meta charset="UTF-8" /><meta name="color-scheme" content="light dark" /></head>
<body>
$errorHtml
</body>
</html>
HTML;
header( 'Content-Length: ' . strlen( $content ) );
echo $content;
die();
}