api.php

   1 <?php
   2
   3 /**
   4  * API for MediaWiki 1.8+
   5  *
   6  * Copyright (C) 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 /**
  27  * This file is the entry point for all API queries. It begins by checking
  28  * whether the API is enabled on this wiki; if not, it informs the user that
  29  * s/he should set $wgEnableAPI to true and exits. Otherwise, it constructs
  30  * a new ApiMain using the parameter passed to it as an argument in the URL
  31  * ('?action=') and with write-enabled set to the value of $wgEnableWriteAPI
  32  * as specified in LocalSettings.php. It then invokes "execute()" on the
  33  * ApiMain object instance, which produces output in the format sepecified
  34  * in the URL.
  35  */
  36
  37 // Initialise common code
  38 require (dirname(__FILE__) . '/includes/WebStart.php');
  39
  40 wfProfileIn('api.php');
  41
  42 // URL safety checks
  43 //
  44 // See RawPage.php for details; summary is that MSIE can override the
  45 // Content-Type if it sees a recognized extension on the URL, such as
  46 // might be appended via PATH_INFO after 'api.php'.
  47 //
  48 // Some data formats can end up containing unfiltered user-provided data
  49 // which will end up triggering HTML detection and execution, hence
  50 // XSS injection and all that entails.
  51 //
  52 // Ensure that all access is through the canonical entry point...
  53 //
  54 if( isset( $_SERVER['SCRIPT_NAME'] ) ) {
  55         $url = $_SERVER['SCRIPT_NAME'];
  56 } else {
  57         $url = $_SERVER['URL'];
  58 }
  59 if( strcmp( "$wgScriptPath/api$wgScriptExtension", $url ) ) {
  60         wfHttpError( 403, 'Forbidden',
  61                 'API must be accessed through the primary script entry point.' );
  62         return;
  63 }
  64
  65 // Verify that the API has not been disabled
  66 if (!$wgEnableAPI) {
  67         echo 'MediaWiki API is not enabled for this site. Add the following line to your LocalSettings.php';
  68         echo '<pre><b>$wgEnableAPI=true;</b></pre>';
  69         die(1);
  70 }
  71
  72 // Selectively allow cross-site AJAX
  73 if ( $wgCrossSiteAJAXdomains && isset($_SERVER['HTTP_ORIGIN']) ) {
  74         if ( $wgCrossSiteAJAXdomains == '*' ) {
  75                 header( "Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}" );
  76                 header( 'Access-Control-Allow-Credentials: true' );
  77         } elseif ( $wgCrossSiteAJAXdomainsRegex ) {
  78                 foreach ( $wgCrossSiteAJAXdomains as $regex ) {
  79                         if ( preg_match( $regex, $_SERVER['HTTP_ORIGIN'] ) ) {
  80                                 header( "Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}" );
  81                                 header( 'Access-Control-Allow-Credentials: true' );
  82                                 break;
  83                         }
  84                 }
  85         } elseif ( in_array( $_SERVER['HTTP_ORIGIN'], $wgCrossSiteAJAXdomains ) ) {
  86                 header( "Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}" );
  87                 header( 'Access-Control-Allow-Credentials: true' );
  88         }
  89 }
  90
  91 // So extensions can check whether they're running in API mode
  92 define('MW_API', true);
  93
  94 // Set a dummy $wgTitle, because $wgTitle == null breaks various things
  95 // In a perfect world this wouldn't be necessary
  96 $wgTitle = Title::newFromText('API');
  97
  98 /* Construct an ApiMain with the arguments passed via the URL. What we get back
  99  * is some form of an ApiMain, possibly even one that produces an error message,
 100  * but we don't care here, as that is handled by the ctor.
 101  */
 102 $processor = new ApiMain($wgRequest, $wgEnableWriteAPI);
 103
 104 // Process data & print results
 105 $processor->execute();
 106
 107 // Execute any deferred updates
 108 wfDoUpdates();
 109
 110 // Log what the user did, for book-keeping purposes.
 111 wfProfileOut('api.php');
 112 wfLogProfilingData();
 113
 114 // Shut down the database
 115 wfGetLBFactory()->shutdown();
 116