BookStack/app/Http/Middleware
..
ApiAuthenticate.php
Authenticate.php
AuthenticatedOrPendingMfa.php
CheckForMaintenanceMode.php
CheckGuard.php
ControlIframeSecurity.php
EncryptCookies.php
Localization.php
PermissionMiddleware.php
RedirectIfAuthenticated.php
RunThemeActions.php
StartSessionIfCookieExists.php
ThrottleApiRequests.php
TrimStrings.php
TrustProxies.php
VerifyCsrfToken.php