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  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 $starttime = microtime( true );
  42
  43 // URL safety checks
  44 //
  45 // See RawPage.php for details; summary is that MSIE can override the
  46 // Content-Type if it sees a recognized extension on the URL, such as
  47 // might be appended via PATH_INFO after 'api.php'.
  48 //
  49 // Some data formats can end up containing unfiltered user-provided data
  50 // which will end up triggering HTML detection and execution, hence
  51 // XSS injection and all that entails.
  52 //
  53 if ( $wgRequest->isPathInfoBad() ) {
  54         wfHttpError( 403, 'Forbidden',
  55                 'Invalid file extension found in PATH_INFO. ' .
  56                 'The API must be accessed through the primary script entry point.' );
  57         return;
  58 }
  59
  60 // Verify that the API has not been disabled
  61 if ( !$wgEnableAPI ) {
  62         echo 'MediaWiki API is not enabled for this site. Add the following line to your LocalSettings.php';
  63         echo '<pre><b>$wgEnableAPI=true;</b></pre>';
  64         die( 1 );
  65 }
  66
  67 // Selectively allow cross-site AJAX
  68
  69 /*
  70  * Helper function to convert wildcard string into a regex
  71  * '*' => '.*?'
  72  * '?' => '.'
  73  * @ return string
  74  */
  75 function convertWildcard( $search ) {
  76         $search = preg_quote( $search, '/' );
  77         $search = str_replace(
  78                 array( '\*', '\?' ),
  79                 array( '.*?', '.' ),
  80                 $search
  81         );
  82         return "/$search/";
  83 }
  84
  85 if ( $wgCrossSiteAJAXdomains && isset( $_SERVER['HTTP_ORIGIN'] ) ) {
  86         $exceptions = array_map( 'convertWildcard', $wgCrossSiteAJAXdomainExceptions );
  87         $regexes = array_map( 'convertWildcard', $wgCrossSiteAJAXdomains );
  88         foreach ( $regexes as $regex ) {
  89                 if ( preg_match( $regex, $_SERVER['HTTP_ORIGIN'] ) ) {
  90                         foreach ( $exceptions as $exc ) { // Check against exceptions
  91                                 if ( preg_match( $exc, $_SERVER['HTTP_ORIGIN'] ) ) {
  92                                         break 2;
  93                                 }
  94                         }
  95                         header( "Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}" );
  96                         header( 'Access-Control-Allow-Credentials: true' );
  97                         break;
  98                 }
  99         }
 100 }
 101
 102 // So extensions can check whether they're running in API mode
 103 define( 'MW_API', true );
 104
 105 // Set a dummy $wgTitle, because $wgTitle == null breaks various things
 106 // In a perfect world this wouldn't be necessary
 107 $wgTitle = Title::makeTitle( NS_MAIN, 'API' );
 108
 109 /* Construct an ApiMain with the arguments passed via the URL. What we get back
 110  * is some form of an ApiMain, possibly even one that produces an error message,
 111  * but we don't care here, as that is handled by the ctor.
 112  */
 113 $processor = new ApiMain( $wgRequest, $wgEnableWriteAPI );
 114
 115 // Process data & print results
 116 $processor->execute();
 117
 118 // Execute any deferred updates
 119 wfDoUpdates();
 120
 121 // Log what the user did, for book-keeping purposes.
 122 $endtime = microtime( true );
 123 wfProfileOut( 'api.php' );
 124 wfLogProfilingData();
 125
 126 // Log the request
 127 if ( $wgAPIRequestLog ) {
 128         $items = array(
 129                         wfTimestamp( TS_MW ),
 130                         $endtime - $starttime,
 131                         wfGetIP(),
 132                         $_SERVER['HTTP_USER_AGENT']
 133         );
 134         $items[] = $wgRequest->wasPosted() ? 'POST' : 'GET';
 135         if ( $processor->getModule()->mustBePosted() ) {
 136                 $items[] = "action=" . $wgRequest->getVal( 'action' );
 137         } else {
 138                 $items[] = wfArrayToCGI( $wgRequest->getValues() );
 139         }
 140         wfErrorLog( implode( ',', $items ) . "\n", $wgAPIRequestLog );
 141         wfDebug( "Logged API request to $wgAPIRequestLog\n" );
 142 }
 143
 144 // Shut down the database
 145 wfGetLBFactory()->shutdown();
 146