[Rails] request.subdomain Returns blank array

[Kausik Bakshi]

Hi I am a new Rails Developer

My application_controller is:

class ApplicationController < ActionController::Base
  protect_from_forgery

  before_filter :sshow

  def sshow
    puts "==========================="
    puts YAML::dump(request.subdomains)
  end
end

now when I put kausik.localhost:3000 in my browser address bar it
returns blank Array [] instead ['kausik'] .

Also I rewrite etc/host file for this subdomain.

Please help me

Thanks & regards
Kausik

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