Multiple robots.txt for subdomains in rails

Question

I have a site with multiple subdomains and I want the named subdomains robots.txt to be different from the www one.

I tried to use .htaccess, but the FastCGI doesn\'t lo

Answer 1

For Rails 3:

Create a controller RobotsController:

class RobotsController < ApplicationController
#This controller will render the correct 'robots' view depending on your subdomain.
  def robots
    subdomain = request.subdomain # you should also check for emptyness
    render "robots.#{request.subdomain}"
  end
end

Create robots views (1 per subdomain):

• views/robots/robots.subdomain1.txt
• views/robots/robots.subdomain2.txt
• etc...

Add a new route in config/routes.rb: (note the :txt format option)

match '/robots.txt' => 'robots#robots', :format => :txt

And of course, you should declare the :txt format in config/initializers/Mime_types.rb:

Mime::Type.register "text/plain", :txt

Hope it helps.