Custom headers for HTTP statuses in Ruby on Rails
Adding headers for specific HTTP statuses in Ruby on Rails can be easily accomplished using
def render(*args) super.tap do if (400..599).cover?(response.status) response.headers['X-Custom-Error'] = '1' end end end
There’s a lot you can do with this. As your application grows in complexity, using this pattern can help you communicate between your app and things like a reverse proxy.