includes/filerepo/ForeignAPIRepo.php

   1 <?php
   2
   3 /**
   4  * A foreign repository with a remote MediaWiki with an API thingy
   5  * Very hacky and inefficient
   6  * do not use except for testing :D
   7  *
   8  * Example config:
   9  *
  10  * $wgForeignFileRepos[] = array(
  11  *   'class'            => 'ForeignAPIRepo',
  12  *   'name'             => 'shared',
  13  *   'apibase'          => 'http://en.wikipedia.org/w/api.php',
  14  *   'fetchDescription' => true, // Optional
  15  * );
  16  *
  17  * @ingroup FileRepo
  18  */
  19 class ForeignAPIRepo extends FileRepo {
  20         protected $mQueryCache = array();
  21
  22         function __construct( $info ) {
  23                 parent::__construct( $info );
  24                 $this->mApiBase = $info['apibase']; // http://commons.wikimedia.org/w/api.php
  25                 if( !$this->scriptDirUrl ) {
  26                         // hack for description fetches
  27                         $this->scriptDirUrl = dirname( $this->mApiBase );
  28                 }
  29         }
  30
  31         function storeBatch( $triplets, $flags = 0 ) {
  32                 return false;
  33         }
  34
  35         function storeTemp( $originalName, $srcPath ) {
  36                 return false;
  37         }
  38         function publishBatch( $triplets, $flags = 0 ) {
  39                 return false;
  40         }
  41         function deleteBatch( $sourceDestPairs ) {
  42                 return false;
  43         }
  44         function getFileProps( $virtualUrl ) {
  45                 return false;
  46         }
  47         function newFile( $title, $time = false ) {
  48                 return false;
  49         }
  50
  51         protected function queryImage( $query ) {
  52                 $data = $this->fetchImageQuery( $query );
  53
  54                 if( isset( $data['query']['pages'] ) ) {
  55                         foreach( $data['query']['pages'] as $pageid => $info ) {
  56                                 if( isset( $info['imageinfo'][0] ) ) {
  57                                         return $info['imageinfo'][0];
  58                                 }
  59                         }
  60                 }
  61                 return false;
  62         }
  63
  64         protected function fetchImageQuery( $query ) {
  65                 global $wgMemc;
  66
  67                 $url = $this->mApiBase .
  68                         '?' .
  69                         wfArrayToCgi(
  70                                 array_merge( $query,
  71                                         array(
  72                                                 'format' => 'json',
  73                                                 'action' => 'query',
  74                                                 'prop' => 'imageinfo' ) ) );
  75
  76                 if( !isset( $this->mQueryCache[$url] ) ) {
  77                         $key = wfMemcKey( 'ForeignAPIRepo', $url );
  78                         $data = $wgMemc->get( $key );
  79                         if( !$data ) {
  80                                 $data = Http::get( $url );
  81                                 $wgMemc->set( $key, $data, 3600 );
  82                         }
  83
  84                         if( count( $this->mQueryCache ) > 100 ) {
  85                                 // Keep the cache from growing infinitely
  86                                 $this->mQueryCache = array();
  87                         }
  88                         $this->mQueryCache[$url] = $data;
  89                 }
  90                 return json_decode( $this->mQueryCache[$url], true );
  91         }
  92
  93         function findFile( $title, $time = false ) {
  94                 $info = $this->queryImage( array(
  95                         'titles' => 'Image:' . $title->getText(),
  96                         'iiprop' => 'timestamp|user|comment|url|size|sha1|metadata|mimetype' ) );
  97                 if( $info ) {
  98                         return new ForeignAPIFile( $title, $this, $info );
  99                 } else {
 100                         return false;
 101                 }
 102         }
 103
 104         function getThumbUrl( $name, $width=-1, $height=-1 ) {
 105                 $info = $this->queryImage( array(
 106                         'titles' => 'Image:' . $name,
 107                         'iiprop' => 'url',
 108                         'iiurlwidth' => $width,
 109                         'iiurlheight' => $height ) );
 110                 if( $info ) {
 111                         return $info['thumburl'];
 112                 } else {
 113                         return false;
 114                 }
 115         }
 116 }