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 // So extensions (and other code) can check whether they're running in API mode
  38 define( 'MW_API', true );
  39
  40 // Bail if PHP is too low
  41 if ( !function_exists( 'version_compare' ) || version_compare( phpversion(), '5.2.3' ) < 0 ) {
  42         require( dirname( __FILE__ ) . '/includes/PHPVersionError.php' );
  43         wfPHPVersionError( 'api.php' );
  44 }
  45
  46 // Initialise common code.
  47 if ( isset( $_SERVER['MW_COMPILED'] ) ) {
  48         require ( 'phase3/includes/WebStart.php' );
  49 } else {
  50         require ( dirname( __FILE__ ) . '/includes/WebStart.php' );
  51 }
  52
  53 wfProfileIn( 'api.php' );
  54 $starttime = microtime( true );
  55
  56 // URL safety checks
  57 if ( !$wgRequest->checkUrlExtension() ) {
  58         return;
  59 }
  60
  61 // Verify that the API has not been disabled
  62 if ( !$wgEnableAPI ) {
  63         header( $_SERVER['SERVER_PROTOCOL'] . ' 500 MediaWiki configuration Error', true, 500 );
  64         echo( 'MediaWiki API is not enabled for this site. Add the following line to your LocalSettings.php'
  65                 . '<pre><b>$wgEnableAPI=true;</b></pre>' );
  66         die(1);
  67 }
  68
  69 // Selectively allow cross-site AJAX
  70
  71 /**
  72  * Helper function to convert wildcard string into a regex
  73  * '*' => '.*?'
  74  * '?' => '.'
  75  *
  76  * @param $search string
  77  * @return string
  78  */
  79 function convertWildcard( $search ) {
  80         $search = preg_quote( $search, '/' );
  81         $search = str_replace(
  82                 array( '\*', '\?' ),
  83                 array( '.*?', '.' ),
  84                 $search
  85         );
  86         return "/$search/";
  87 }
  88
  89 if ( $wgCrossSiteAJAXdomains && isset( $_SERVER['HTTP_ORIGIN'] ) ) {
  90         $exceptions = array_map( 'convertWildcard', $wgCrossSiteAJAXdomainExceptions );
  91         $regexes = array_map( 'convertWildcard', $wgCrossSiteAJAXdomains );
  92         foreach ( $regexes as $regex ) {
  93                 if ( preg_match( $regex, $_SERVER['HTTP_ORIGIN'] ) ) {
  94                         foreach ( $exceptions as $exc ) { // Check against exceptions
  95                                 if ( preg_match( $exc, $_SERVER['HTTP_ORIGIN'] ) ) {
  96                                         break 2;
  97                                 }
  98                         }
  99                         header( "Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}" );
 100                         header( 'Access-Control-Allow-Credentials: true' );
 101                         break;
 102                 }
 103         }
 104 }
 105
 106 // Set a dummy $wgTitle, because $wgTitle == null breaks various things
 107 // In a perfect world this wouldn't be necessary
 108 //
 109 // @todo @fixme Ummmm, doesn't this line make the PHP4 check at the top completely
 110 // useless? Suggest moving more stuff out of api.php like we did with index.php
 111 $wgTitle = Title::makeTitle( NS_MAIN, 'API' );
 112
 113 /* Construct an ApiMain with the arguments passed via the URL. What we get back
 114  * is some form of an ApiMain, possibly even one that produces an error message,
 115  * but we don't care here, as that is handled by the ctor.
 116  */
 117 $processor = new ApiMain( $wgRequest, $wgEnableWriteAPI );
 118
 119 // Process data & print results
 120 $processor->execute();
 121
 122 // Execute any deferred updates
 123 wfDoUpdates();
 124
 125 // Log what the user did, for book-keeping purposes.
 126 $endtime = microtime( true );
 127 wfProfileOut( 'api.php' );
 128 wfLogProfilingData();
 129
 130 // Log the request
 131 if ( $wgAPIRequestLog ) {
 132         $items = array(
 133                         wfTimestamp( TS_MW ),
 134                         $endtime - $starttime,
 135                         $wgRequest->getIP(),
 136                         $_SERVER['HTTP_USER_AGENT']
 137         );
 138         $items[] = $wgRequest->wasPosted() ? 'POST' : 'GET';
 139         $module = $processor->getModule();
 140         if ( $module->mustBePosted() ) {
 141                 $items[] = "action=" . $wgRequest->getVal( 'action' );
 142         } else {
 143                 $items[] = wfArrayToCGI( $wgRequest->getValues() );
 144         }
 145         wfErrorLog( implode( ',', $items ) . "\n", $wgAPIRequestLog );
 146         wfDebug( "Logged API request to $wgAPIRequestLog\n" );
 147 }
 148
 149 // Shut down the database.  foo()->bar() syntax is not supported in PHP4: we won't ever actually
 150 // get here to worry about whether this should be = or =&, but the file has to parse properly.
 151 $lb = wfGetLBFactory();
 152 $lb->shutdown();
 153