includes/ExternalStore.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  *
   6  * Constructor class for data kept in external repositories
   7  *
   8  * External repositories might be populated by maintenance/async
   9  * scripts, thus partial moving of data may be possible, as well
  10  * as possibility to have any storage format (i.e. for archives)
  11  *
  12  */
  13
  14 class ExternalStore {
  15         /* Fetch data from given URL */
  16         function fetchFromURL($url) {
  17                 global $wgExternalStores;
  18
  19                 if (!$wgExternalStores)
  20                         return false;
  21
  22                 @list($proto,$path)=explode('://',$url,2);
  23                 /* Bad URL */
  24                 if ($path=="")
  25                         return false;
  26                 /* Protocol not enabled */
  27                 if (!in_array( $proto, $wgExternalStores ))
  28                         return false;
  29
  30                 $class='ExternalStore'.ucfirst($proto);
  31                 /* Preloaded modules might exist, especially ones serving multiple protocols */
  32                 if (!class_exists($class)) {
  33                         if (!include_once($class.'.php'))
  34                                 return false;
  35                 }
  36                 $store=new $class();
  37                 return $store->fetchFromURL($url);
  38         }
  39
  40         /* XXX: may require other methods, for store, delete,
  41          * whatever, for initial ext storage
  42          */
  43 }
  44 ?>