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diff --git a/www/wiki/includes/AjaxDispatcher.php b/www/wiki/includes/AjaxDispatcher.php
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+<?php
+/**
+ * Handle ajax requests and send them to the proper handler.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Ajax
+ */
+
+use MediaWiki\MediaWikiServices;
+
+/**
+ * @defgroup Ajax Ajax
+ */
+
+/**
+ * Object-Oriented Ajax functions.
+ * @ingroup Ajax
+ */
+class AjaxDispatcher {
+	/**
+	 * The way the request was made, either a 'get' or a 'post'
+	 * @var string $mode
+	 */
+	private $mode;
+
+	/**
+	 * Name of the requested handler
+	 * @var string $func_name
+	 */
+	private $func_name;
+
+	/** Arguments passed
+	 * @var array $args
+	 */
+	private $args;
+
+	/**
+	 * @var Config
+	 */
+	private $config;
+
+	/**
+	 * Load up our object with user supplied data
+	 * @param Config $config
+	 */
+	function __construct( Config $config ) {
+		$this->config = $config;
+
+		$this->mode = "";
+
+		if ( !empty( $_GET["rs"] ) ) {
+			$this->mode = "get";
+		}
+
+		if ( !empty( $_POST["rs"] ) ) {
+			$this->mode = "post";
+		}
+
+		switch ( $this->mode ) {
+			case 'get':
+				$this->func_name = isset( $_GET["rs"] ) ? $_GET["rs"] : '';
+				if ( !empty( $_GET["rsargs"] ) ) {
+					$this->args = $_GET["rsargs"];
+				} else {
+					$this->args = [];
+				}
+				break;
+			case 'post':
+				$this->func_name = isset( $_POST["rs"] ) ? $_POST["rs"] : '';
+				if ( !empty( $_POST["rsargs"] ) ) {
+					$this->args = $_POST["rsargs"];
+				} else {
+					$this->args = [];
+				}
+				break;
+			default:
+				return;
+				# Or we could throw an exception:
+				# throw new MWException( __METHOD__ . ' called without any data (mode empty).' );
+		}
+	}
+
+	/**
+	 * Pass the request to our internal function.
+	 * BEWARE! Data are passed as they have been supplied by the user,
+	 * they should be carefully handled in the function processing the
+	 * request.
+	 *
+	 * @param User $user
+	 */
+	function performAction( User $user ) {
+		if ( empty( $this->mode ) ) {
+			return;
+		}
+
+		if ( !in_array( $this->func_name, $this->config->get( 'AjaxExportList' ) ) ) {
+			wfDebug( __METHOD__ . ' Bad Request for unknown function ' . $this->func_name . "\n" );
+			wfHttpError(
+				400,
+				'Bad Request',
+				"unknown function " . $this->func_name
+			);
+		} elseif ( !User::isEveryoneAllowed( 'read' ) && !$user->isAllowed( 'read' ) ) {
+			wfHttpError(
+				403,
+				'Forbidden',
+				'You are not allowed to view pages.' );
+		} else {
+			wfDebug( __METHOD__ . ' dispatching ' . $this->func_name . "\n" );
+			try {
+				$result = call_user_func_array( $this->func_name, $this->args );
+
+				if ( $result === false || $result === null ) {
+					wfDebug( __METHOD__ . ' ERROR while dispatching ' .
+						$this->func_name . "(" . var_export( $this->args, true ) . "): " .
+						"no data returned\n" );
+
+					wfHttpError( 500, 'Internal Error',
+						"{$this->func_name} returned no data" );
+				} else {
+					if ( is_string( $result ) ) {
+						$result = new AjaxResponse( $result );
+					}
+
+					// Make sure DB commit succeeds before sending a response
+					$lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
+					$lbFactory->commitMasterChanges( __METHOD__ );
+
+					$result->sendHeaders();
+					$result->printText();
+
+					wfDebug( __METHOD__ . ' dispatch complete for ' . $this->func_name . "\n" );
+				}
+			} catch ( Exception $e ) {
+				wfDebug( __METHOD__ . ' ERROR while dispatching ' .
+					$this->func_name . "(" . var_export( $this->args, true ) . "): " .
+					get_class( $e ) . ": " . $e->getMessage() . "\n" );
+
+				if ( !headers_sent() ) {
+					wfHttpError( 500, 'Internal Error',
+						$e->getMessage() );
+				} else {
+					print $e->getMessage();
+				}
+			}
+		}
+	}
+}