Move trusted domain check to init()

handleRequest() is not called from remote.php or public.php which made these files party available but all included apps in there produced errors.

As the expected behaviour is anyways that a trusted domain warning is shown I moved this to init()

Fixes https://github.com/owncloud/core/issues/10064

lib/base.php

@@ -583,6 +583,21 @@ class OC {
 			);
 			return;
 		}
+
+		$host = OC_Request::insecureServerHost();
+		// if the host passed in headers isn't trusted
+		if (!OC::$CLI
+			// overwritehost is always trusted
+			&& OC_Request::getOverwriteHost() === null
+			&& !OC_Request::isTrustedDomain($host)
+		) {
+			header('HTTP/1.1 400 Bad Request');
+			header('Status: 400 Bad Request');
+			$tmpl = new OCP\Template('core', 'untrustedDomain', 'guest');
+			$tmpl->assign('domain', $_SERVER['SERVER_NAME']);
+			$tmpl->printPage();
+			return;
+		}
 	}
 
 	private static function registerLocalAddressBook() {
@@ -683,21 +698,6 @@ class OC {
 			exit();
 		}
 
-		$host = OC_Request::insecureServerHost();
-		// if the host passed in headers isn't trusted
-		if (!OC::$CLI
-			// overwritehost is always trusted
-			&& OC_Request::getOverwriteHost() === null
-			&& !OC_Request::isTrustedDomain($host)
-		) {
-			header('HTTP/1.1 400 Bad Request');
-			header('Status: 400 Bad Request');
-			$tmpl = new OCP\Template('core', 'untrustedDomain', 'guest');
-			$tmpl->assign('domain', $_SERVER['SERVER_NAME']);
-			$tmpl->printPage();
-			return;
-		}
-
 		$request = OC_Request::getPathInfo();
 		if (substr($request, -3) !== '.js') { // we need these files during the upgrade
 			self::checkMaintenanceMode();