diff options
Diffstat (limited to 'includes/ExternalStore.php')
-rw-r--r-- | includes/ExternalStore.php | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/includes/ExternalStore.php b/includes/ExternalStore.php new file mode 100644 index 00000000..79f1a528 --- /dev/null +++ b/includes/ExternalStore.php @@ -0,0 +1,70 @@ +<?php +/** + * + * @package MediaWiki + * + * Constructor class for data kept in external repositories + * + * External repositories might be populated by maintenance/async + * scripts, thus partial moving of data may be possible, as well + * as possibility to have any storage format (i.e. for archives) + * + */ + +class ExternalStore { + /* Fetch data from given URL */ + function fetchFromURL($url) { + global $wgExternalStores; + + if (!$wgExternalStores) + return false; + + @list($proto,$path)=explode('://',$url,2); + /* Bad URL */ + if ($path=="") + return false; + + $store =& ExternalStore::getStoreObject( $proto ); + if ( $store === false ) + return false; + return $store->fetchFromURL($url); + } + + /** + * Get an external store object of the given type + */ + function &getStoreObject( $proto ) { + global $wgExternalStores; + if (!$wgExternalStores) + return false; + /* Protocol not enabled */ + if (!in_array( $proto, $wgExternalStores )) + return false; + + $class='ExternalStore'.ucfirst($proto); + /* Preloaded modules might exist, especially ones serving multiple protocols */ + if (!class_exists($class)) { + if (!include_once($class.'.php')) + return false; + } + $store=new $class(); + return $store; + } + + /** + * Store a data item to an external store, identified by a partial URL + * The protocol part is used to identify the class, the rest is passed to the + * class itself as a parameter. + * Returns the URL of the stored data item, or false on error + */ + function insert( $url, $data ) { + list( $proto, $params ) = explode( '://', $url, 2 ); + $store =& ExternalStore::getStoreObject( $proto ); + if ( $store === false ) { + return false; + } else { + return $store->store( $params, $data ); + } + } +} +?> |