From c329938304c48adc73d6ea3637b288d2ced93ec7 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Sat, 18 May 2013 14:59:11 +0200
Subject: [PATCH] Added rescue mode

Fixes #1126
---
 .../install/files/lib/system/WCFACP.class.php | 11 +++++++-
 .../lib/system/request/LinkHandler.class.php  | 25 +++++++++++------
 .../system/request/RequestHandler.class.php   | 28 +++++++++++++++++++
 3 files changed, 54 insertions(+), 10 deletions(-)

diff --git a/wcfsetup/install/files/lib/system/WCFACP.class.php b/wcfsetup/install/files/lib/system/WCFACP.class.php
index e52542ee60..15d0207e7e 100644
--- a/wcfsetup/install/files/lib/system/WCFACP.class.php
+++ b/wcfsetup/install/files/lib/system/WCFACP.class.php
@@ -65,7 +65,16 @@ class WCFACP extends WCF {
 			if (WCF::getUser()->userID == 0) {
 				// build redirect path
 				$application = ApplicationHandler::getInstance()->getActiveApplication();
-				$path = $application->getPageURL() . 'acp/index.php/Login/' . SID_ARG_1ST . '&url=' . rawurlencode(WCF::getSession()->requestURI);
+				
+				// fallback for unknown host (rescue mode)
+				if ($application->domainName != $_SERVER['HTTP_HOST']) {
+					$pageURL = RouteHandler::getProtocol() . $_SERVER['HTTP_HOST'] . RouteHandler::getPath(array('acp'));
+				}
+				else {
+					$pageURL = $application->getPageURL();
+				}
+				
+				$path = $pageURL . 'acp/index.php/Login/' . SID_ARG_1ST . '&url=' . rawurlencode(WCF::getSession()->requestURI);
 				
 				HeaderUtil::redirect($path);
 				exit;
diff --git a/wcfsetup/install/files/lib/system/request/LinkHandler.class.php b/wcfsetup/install/files/lib/system/request/LinkHandler.class.php
index c85cbac3a9..e1a1c5dcae 100644
--- a/wcfsetup/install/files/lib/system/request/LinkHandler.class.php
+++ b/wcfsetup/install/files/lib/system/request/LinkHandler.class.php
@@ -144,18 +144,25 @@ class LinkHandler extends SingletonFactory {
 			$url = RouteHandler::getHost() . RouteHandler::getPath(array('acp')) . ($isACP ? 'acp/' : '') . $url;
 		}
 		else {
-			// try to resolve abbreviation
-			$application = null;
-			if ($abbreviation != 'wcf') {
-				$application = ApplicationHandler::getInstance()->getApplication($abbreviation);
+			if (RequestHandler::getInstance()->inRescueMode()) {
+				$pageURL = RouteHandler::getHost() . RouteHandler::getPath(array('acp'));
 			}
-			
-			// fallback to primary application if abbreviation is 'wcf' or unknown
-			if ($application === null) {
-				$application = ApplicationHandler::getInstance()->getPrimaryApplication();
+			else {
+				// try to resolve abbreviation
+				$application = null;
+				if ($abbreviation != 'wcf') {
+					$application = ApplicationHandler::getInstance()->getApplication($abbreviation);
+				}
+				
+				// fallback to primary application if abbreviation is 'wcf' or unknown
+				if ($application === null) {
+					$application = ApplicationHandler::getInstance()->getPrimaryApplication();
+				}
+				
+				$pageURL = $application->getPageURL();
 			}
 			
-			$url = $application->getPageURL() . ($isACP ? 'acp/' : '') . $url;
+			$url = $pageURL . ($isACP ? 'acp/' : '') . $url;
 		}
 		
 		// append previously removed anchor
diff --git a/wcfsetup/install/files/lib/system/request/RequestHandler.class.php b/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
index 68a11ceec7..ef43988a38 100644
--- a/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
+++ b/wcfsetup/install/files/lib/system/request/RequestHandler.class.php
@@ -1,5 +1,6 @@
 <?php
 namespace wcf\system\request;
+use wcf\system\application\ApplicationHandler;
 use wcf\system\exception\AJAXException;
 use wcf\system\exception\IllegalLinkException;
 use wcf\system\exception\SystemException;
@@ -26,12 +27,30 @@ class RequestHandler extends SingletonFactory {
 	 */
 	protected $activeRequest = null;
 	
+	/**
+	 * true, if current domain mismatch any known domain
+	 * @var	boolean
+	 */
+	protected $inRescueMode = true;
+	
 	/**
 	 * indicates if the request is an acp request
 	 * @var	boolean
 	 */
 	protected $isACPRequest = false;
 	
+	/**
+	 * @see	wcf\system\SingletonFactory::init()
+	 */
+	protected function init() {
+		foreach (ApplicationHandler::getInstance()->getApplications() as $application) {
+			if ($application->domainName == $_SERVER['HTTP_HOST']) {
+				$this->inRescueMode = false;
+				break;
+			}
+		}
+	}
+	
 	/**
 	 * Handles a http request.
 	 *
@@ -171,4 +190,13 @@ class RequestHandler extends SingletonFactory {
 	public function isACPRequest() {
 		return $this->isACPRequest;
 	}
+	
+	/**
+	 * Returns true, if current host mismatches any known domain.
+	 * 
+	 * @return	boolean
+	 */
+	public function inRescueMode() {
+		return $this->inRescueMode;
+	}
 }
-- 
2.20.1