while new jsons file do not exist it is not redirecting to 404 or any other error

[cadentic]

Route::get('/client_main/{fileName}', 'IndexController@gotoMain');
Route::get('/client_inner/{fileName}', 'IndexController@gotoInner');
Route::get('/client_inner2/{fileName}', 'IndexController@gotoInner2');
Route::get('/client_inner3/{fileName}', 'IndexController@gotoInner3');
Route::get('/client_inner4/{fileName}', 'IndexController@gotoInner4');

Route::get('/client_innerblank/{fileName}', 'IndexController@gotoInnerblank');
Route::get('/client_innerblank2/{fileName}', 'IndexController@gotoInnerblank2');