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 if( $wgRequest->isPathInfoBad() ) {
  53         wfHttpError( 403, 'Forbidden',
  54                 'Invalid file extension found in PATH_INFO. ' .
  55                 'The API must be accessed through the primary script entry point.' );
  56         return;
  57 }
  58
  59 // Verify that the API has not been disabled
  60 if (!$wgEnableAPI) {
  61         echo 'MediaWiki API is not enabled for this site. Add the following line to your LocalSettings.php';
  62         echo '<pre><b>$wgEnableAPI=true;</b></pre>';
  63         die(1);
  64 }
  65
  66 // Selectively allow cross-site AJAX
  67
  68 /*
  69  * Helper function to convert wildcard string into a regex
  70  * '*' => '.*?'
  71  * '?' => '.'
  72  * @ return string
  73  */
  74 function convertWildcard( $search ) {
  75         $search = preg_quote( $search, '/' );
  76         $search = str_replace(
  77                 array( '\*', '\?' ),
  78                 array( '.*?', '.' ),
  79                 $search
  80         );
  81         return "/$search/";
  82 }
  83
  84 if ( $wgCrossSiteAJAXdomains && isset($_SERVER['HTTP_ORIGIN']) ) {
  85         $exceptions = array_map( 'convertWildcard', $wgCrossSiteAJAXdomainExceptions );
  86         $regexes = array_map( 'convertWildcard', $wgCrossSiteAJAXdomains );
  87         foreach ( $regexes as $regex ) {
  88                 if ( preg_match( $regex, $_SERVER['HTTP_ORIGIN'] ) ) {
  89                         foreach ( $exceptions as $exc ) { // Check against exceptions
  90                                 if ( preg_match( $exc, $_SERVER['HTTP_ORIGIN'] ) ) {
  91                                         break 2;
  92                                 }
  93                         }
  94                         header( "Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}" );
  95                         header( 'Access-Control-Allow-Credentials: true' );
  96                         break;
  97                 }
  98         }
  99 }
 100
 101 // So extensions can check whether they're running in API mode
 102 define('MW_API', true);
 103
 104 // Set a dummy $wgTitle, because $wgTitle == null breaks various things
 105 // In a perfect world this wouldn't be necessary
 106 $wgTitle = Title::newFromText('API');
 107
 108 /* Construct an ApiMain with the arguments passed via the URL. What we get back
 109  * is some form of an ApiMain, possibly even one that produces an error message,
 110  * but we don't care here, as that is handled by the ctor.
 111  */
 112 $processor = new ApiMain($wgRequest, $wgEnableWriteAPI);
 113
 114 // Process data & print results
 115 $processor->execute();
 116
 117 // Execute any deferred updates
 118 wfDoUpdates();
 119
 120 // Log what the user did, for book-keeping purposes.
 121 wfProfileOut('api.php');
 122 wfLogProfilingData();
 123
 124 // Shut down the database
 125 wfGetLBFactory()->shutdown();
 126