ruby-on-rails – Rails 500错误会覆盖我的标题

def cors
  headers['Access-Control-Allow-Origin'] = '*'
  headers['Access-Control-Allow-Headers'] = 'X-AUTH-TOKEN,X-API-VERSION,X-Requested-With,Content-Type,Accept,Origin'
  headers['Access-Control-Allow-Methods'] = 'POST,GET,PUT,DELETE,OPTIONS'
  headers['Access-Control-Max-Age'] = "1728000"
end

before_filter :cors

这很好用.然后,如果路由上引发错误,则会覆盖标头.

def index
  object.undefined_method() // undefined method `undefined_method'
end

响应标头：

Keep-Alive
Content-Length →16399
Content-Type →text/html; charset=utf-8
Date →Thu,08 May 2014 18:51:20 GMT
Server →WEBrick/1.3.1 (Ruby/2.0.0/2013-11-22)
X-Request-Id →6ace3d4e-4367-452c-a924-c4c490f207de
X-Runtime →0.130761

即使before_filter运行,那些标题也不存在.虽然不应该存在500错误,但我希望前端开发人员能够给我一个比“我这样做并且CORS不起作用”更具描述性的错误.我希望CORS能够得到结果.

谢谢.