With Rails 3 routes, how do you only allow a requests from 127.0.0.1?

I'm writing an app where several of the routes should only be accessible from localhost. It looks like this is possible with the new routing system.

http://www.railsdispatch.com/posts/rails-3-makes-life-better

This has examples of restricting routes based on IP address, and setting up an IP address blacklist for your routes, but I'm interested in a whitelist with just one IP address.

It would be cool if something like this worked:

get "/posts" =开发者_JAVA百科> "posts#show", :constraints => {:ip => '127.0.0.1'}

But it didn't. Am I just missing the right syntax?

you can do this

get "/posts" => "posts#show", :constraints => {:ip => /127.0.0.1/}

or this

constraints(:ip => /127.0.0.1/) do
  get "/posts" => "posts#show"
end

following the example in Yehuda's post, you shoud create an approriate object to handle complex constraints. so, just editing that example could help. there's a line of code which checks if some ip is blacklisted:

!@ips.include?(request.remote_ip)

you should write similar logic (but simpler) that checks if request.remote_ip == 127.0.0.1