handle service not available exceptions in index, remote and public.php

index.php

@@ -27,6 +27,12 @@ try {
 
 	OC::handleRequest();
 
+} catch(\OC\ServiceUnavailableException $ex) {
+	\OCP\Util::logException('index', $ex);
+
+	//show the user a detailed error page
+	OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
+	OC_Template::printExceptionErrorPage($ex);
 } catch (Exception $ex) {
 	\OCP\Util::logException('index', $ex);
 

public.php

@@ -45,6 +45,11 @@ try {
 
 	require_once OC_App::getAppPath($app) . '/' . $parts[1];
 
+} catch (\OC\ServiceUnavailableException $ex) {
+	//show the user a detailed error page
+	OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
+	\OCP\Util::writeLog('remote', $ex->getMessage(), \OCP\Util::FATAL);
+	OC_Template::printExceptionErrorPage($ex);
 } catch (Exception $ex) {
 	//show the user a detailed error page
 	OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);

remote.php

@@ -51,6 +51,10 @@ try {
 	$baseuri = OC::$WEBROOT . '/remote.php/'.$service.'/';
 	require_once $file;
 
+} catch (\OC\ServiceUnavailableException $ex) {
+	OC_Response::setStatus(OC_Response::STATUS_SERVICE_UNAVAILABLE);
+	\OCP\Util::writeLog('remote', $ex->getMessage(), \OCP\Util::FATAL);
+	OC_Template::printExceptionErrorPage($ex);
 } catch (Exception $ex) {
 	OC_Response::setStatus(OC_Response::STATUS_INTERNAL_SERVER_ERROR);
 	\OCP\Util::writeLog('remote', $ex->getMessage(), \OCP\Util::FATAL);