includes/WebStart.php

   1 <?php
   2 /**
   3  * This does the initial set up for a web request.
   4  *
   5  * It does some security checks, loads autoloaders, constants, and
   6  * global functions, starts the profiler, loads the configuration,
   7  * and loads Setup.php, which loads extensions using the extension
   8  * registration system and initializes the application's global state.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  *
  25  * @file
  26  */
  27
  28 # T17461: Make IE8 turn off content sniffing. Everybody else should ignore this
  29 # We're adding it here so that it's *always* set, even for alternate entry
  30 # points and when $wgOut gets disabled or overridden.
  31 header( 'X-Content-Type-Options: nosniff' );
  32
  33 # Valid web server entry point, enable includes.
  34 # Please don't move this line to includes/Defines.php. This line essentially
  35 # defines a valid entry point. If you put it in includes/Defines.php, then
  36 # any script that includes it becomes an entry point, thereby defeating
  37 # its purpose.
  38 define( 'MEDIAWIKI', true );
  39
  40 # Full path to the installation directory.
  41 $IP = getenv( 'MW_INSTALL_PATH' );
  42 if ( $IP === false ) {
  43         $IP = dirname( __DIR__ );
  44 }
  45
  46 // If no LocalSettings file exists, try to display an error page
  47 // (use a callback because it depends on TemplateParser)
  48 if ( !defined( 'MW_CONFIG_CALLBACK' ) ) {
  49         if ( !defined( 'MW_CONFIG_FILE' ) ) {
  50                 define( 'MW_CONFIG_FILE', "$IP/LocalSettings.php" );
  51         }
  52         if ( !is_readable( MW_CONFIG_FILE ) ) {
  53
  54                 function wfWebStartNoLocalSettings() {
  55                         # LocalSettings.php is the per-site customization file. If it does not exist
  56                         # the wiki installer needs to be launched or the generated file uploaded to
  57                         # the root wiki directory. Give a hint, if it is not readable by the server.
  58                         global $IP;
  59                         require_once "$IP/includes/NoLocalSettings.php";
  60                         die();
  61                 }
  62
  63                 define( 'MW_CONFIG_CALLBACK', 'wfWebStartNoLocalSettings' );
  64         }
  65 }
  66
  67 // Custom setup for WebStart entry point
  68 if ( !defined( 'MW_SETUP_CALLBACK' ) ) {
  69
  70         function wfWebStartSetup() {
  71                 // Initialise output buffering
  72                 // Check for previously set up buffers, to avoid a mix of gzip and non-gzip output.
  73                 if ( ob_get_level() == 0 ) {
  74                         ob_start( 'MediaWiki\\OutputHandler::handle' );
  75                 }
  76         }
  77
  78         define( 'MW_SETUP_CALLBACK', 'wfWebStartSetup' );
  79 }
  80
  81 require_once "$IP/includes/Setup.php";
  82
  83 # Multiple DBs or commits might be used; keep the request as transactional as possible
  84 if ( isset( $_SERVER['REQUEST_METHOD'] ) && $_SERVER['REQUEST_METHOD'] === 'POST' ) {
  85         ignore_user_abort( true );
  86 }
  87
  88 if ( !defined( 'MW_API' ) &&
  89         RequestContext::getMain()->getRequest()->getHeader( 'Promise-Non-Write-API-Action' )
  90 ) {
  91         header( 'Cache-Control: no-cache' );
  92         header( 'Content-Type: text/html; charset=utf-8' );
  93         HttpStatus::header( 400 );
  94         $errorHtml = wfMessage( 'nonwrite-api-promise-error' )
  95                 ->useDatabase( false )
  96                 ->inContentLanguage()
  97                 ->escaped();
  98         $content = <<<HTML
  99 <!DOCTYPE html>
 100 <html>
 101 <head><meta charset="UTF-8" /></head>
 102 <body>
 103 $errorHtml
 104 </body>
 105 </html>
 106
 107 HTML;
 108         header( 'Content-Length: ' . strlen( $content ) );
 109         echo $content;
 110         die();
 111 }