Rails 3 - Whitelisting list of IPs via routes

Question

This is a two part question. I'm needing to restrict a rails site that I'm throwing on development server to only a few IP addresses, so the public can't access it. (Basic HTTP auth doesn't 'entirely' work as the auth breaks a Flash uploader in the project.)

Based on what I've Googled, this is what I've come up with in my routes file...

class WhitelistConstraint
  def initialize
    @ips = '127.0.0.1'
  end

  def matches?(request)
    @ips.include?(request.remote_ip)
  end
end

MyProject::Application.routes.draw do
  constraints WhitelistConstraint.new do
     # all my routing stuff here
  end
end

Works pretty good. However, I need to modify this in order to work with several IP addresses. I tried using a array on @ips, as well as looping through an each loop, but neither worked.

On top of that, the second part of my question...I may need to check only against a segment of the IP, like '127.0.0'. How would I do that?

Answer 1

I didn't know you could do this through routes, my approach would be to just have a before_filter in the ApplicationController and just have something that does:

before_filter :protect

def protect
  @ips = ['127.0.0.1', '203.123.10.1'] #And so on ...]
  if not @ips.include? request.remote_ip
     # Check for your subnet stuff here, for example
     # if not request.remote_ip.include?('127.0.0.1')
     render :text => "You are unauthorized"
     return
  end
end