From a6aac77d16bb7d5683bc7f67ac96f88e6ab177e3 Mon Sep 17 00:00:00 2001
From: Aryeh Gregor <simetrical@users.mediawiki.org>
Date: Fri, 13 Aug 2010 21:39:51 +0000
Subject: [PATCH] Revert r70960 "AjaxDispatcher, now ~30 lines shorter and not
 using $_GET or $_POST"

Broke CategoryTree, see code review for the error message.
---
 includes/AjaxDispatcher.php | 48 +++++++++++++++++++++++++++++--------
 index.php                   |  2 +-
 2 files changed, 39 insertions(+), 11 deletions(-)

diff --git a/includes/AjaxDispatcher.php b/includes/AjaxDispatcher.php
index 969efa4790..16e5301180 100644
--- a/includes/AjaxDispatcher.php
+++ b/includes/AjaxDispatcher.php
@@ -18,23 +18,51 @@ require_once( 'AjaxFunctions.php' );
  * @ingroup Ajax
  */
 class AjaxDispatcher {
+	/** The way the request was made, either a 'get' or a 'post' */
+	private $mode;
+
 	/** Name of the requested handler */
-	private $func_name = null;
+	private $func_name;
 
 	/** Arguments passed */
-	private $args = array();
+	private $args;
 
 	/** Load up our object with user supplied data */
-	public function __construct( WebRequest $req ) {
+	function __construct() {
 		wfProfileIn( __METHOD__ );
 
-		$rs = $req->getVal( 'rs' );
-		if( $rs !== null ) {
-			$this->func_name = $rs;
+		$this->mode = "";
+
+		if ( ! empty( $_GET["rs"] ) ) {
+			$this->mode = "get";
 		}
-		$rsargs = $req->getVal( 'rsargs' );
-		if( $rsargs !== null ) {
-			$this->args = $rsargs;
+
+		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 = array();
+				}
+				break;
+			case 'post':
+				$this->func_name = isset( $_POST["rs"] ) ? $_POST["rs"] : '';
+				if ( ! empty( $_POST["rsargs"] ) ) {
+					$this->args = $_POST["rsargs"];
+				} else {
+					$this->args = array();
+				}
+				break;
+			default:
+				wfProfileOut( __METHOD__ );
+				return;
+				# Or we could throw an exception:
+				# throw new MWException( __METHOD__ . ' called without any data (mode empty).' );
 		}
 
 		wfProfileOut( __METHOD__ );
@@ -48,7 +76,7 @@ class AjaxDispatcher {
 	function performAction() {
 		global $wgAjaxExportList, $wgOut;
 
-		if ( is_null( $this->func_name ) ) {
+		if ( empty( $this->mode ) ) {
 			return;
 		}
 
diff --git a/index.php b/index.php
index 9f45c59172..dcea36b5b7 100644
--- a/index.php
+++ b/index.php
@@ -68,7 +68,7 @@ wfProfileOut( 'main-misc-setup' );
 #
 if( $wgUseAjax && $action == 'ajax' ) {
 	require_once( $IP . '/includes/AjaxDispatcher.php' );
-	$dispatcher = new AjaxDispatcher( $wgRequest );
+	$dispatcher = new AjaxDispatcher();
 	$dispatcher->performAction();
 	$mediaWiki->restInPeace();
 	exit;
-- 
2.20.1