+// Selectively allow cross-site AJAX
+
+/**
+ * Helper function to convert wildcard string into a regex
+ * '*' => '.*?'
+ * '?' => '.'
+ *
+ * @param $search string
+ * @return string
+ */
+function convertWildcard( $search ) {
+ $search = preg_quote( $search, '/' );
+ $search = str_replace(
+ array( '\*', '\?' ),
+ array( '.*?', '.' ),
+ $search
+ );
+ return "/$search/";
+}
+
+if ( $wgCrossSiteAJAXdomains && isset( $_SERVER['HTTP_ORIGIN'] ) ) {
+ $exceptions = array_map( 'convertWildcard', $wgCrossSiteAJAXdomainExceptions );
+ $regexes = array_map( 'convertWildcard', $wgCrossSiteAJAXdomains );
+ foreach ( $regexes as $regex ) {
+ if ( preg_match( $regex, $_SERVER['HTTP_ORIGIN'] ) ) {
+ foreach ( $exceptions as $exc ) { // Check against exceptions
+ if ( preg_match( $exc, $_SERVER['HTTP_ORIGIN'] ) ) {
+ break 2;
+ }
+ }
+ header( "Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}" );
+ header( 'Access-Control-Allow-Credentials: true' );
+ break;
+ }
+ }
+}
+
+// Set a dummy $wgTitle, because $wgTitle == null breaks various things
+// In a perfect world this wouldn't be necessary
+$wgTitle = Title::makeTitle( NS_MAIN, 'API' );
+