A rack based 'redirector'

README.mdown

A rack based 'redirector'

config.ru

require './redirector'

run Redirector.app

Gemfile

source :rubygems

gem 'rack'
gem 'rack-rewrite'
gem 'activesupport'

group :test do
  gem 'rspec'
  gem 'rack-test'
end

Gemfile.lock

GEM
  remote: http://rubygems.org/
  specs:
    activesupport (3.2.8)
      i18n (~> 0.6)
      multi_json (~> 1.0)
    diff-lcs (1.1.3)
    i18n (0.6.1)
    multi_json (1.3.6)
    rack (1.4.1)
    rack-rewrite (1.2.1)
    rack-test (0.6.1)
      rack (>= 1.0)
    rspec (2.11.0)
      rspec-core (~> 2.11.0)
      rspec-expectations (~> 2.11.0)
      rspec-mocks (~> 2.11.0)
    rspec-core (2.11.1)
    rspec-expectations (2.11.3)
      diff-lcs (~> 1.1.3)
    rspec-mocks (2.11.3)

PLATFORMS
  ruby

DEPENDENCIES
  activesupport
  rack
  rack-rewrite
  rack-test
  rspec

redirector.rb

require 'rack/rewrite'
require 'rack/rewrite/rule'
require 'active_support/core_ext'

# Monkey patch Rack::Rewrite to sprinkle some sugar over 'with_options'
module Rack
  class Rewrite
    class RuleSet
      def domain(domain, &block)
        with_options :host => domain, &block
      end
    end
  end
end

module Redirector
  def self.app
    base_app = lambda { raise 'Request should have been redirected' }

    Rack::Rewrite.new(base_app) do
      domain %r{wenttojump\.com} do |wenttojump|
        wenttojump.r301 %r{(.*)}, 'http://econsultancy.com/jump/london/about/photos'
      end

      domain %r{jump} do |jump|
        jump.r301 %r{(.*)}, 'http://econsultancy.com/jump/london$1'
      end

      r301 %r{(.*)}, 'http://econsultancy.com$1'
    end 
  end
end

redirector_spec.rb

require 'rack/test'
require './redirector'

describe Redirector do
  include Rack::Test::Methods

  def app
    @app = Redirector.app
  end

  describe 'cometojump.com' do
    it { should_redirect 'http://cometojump.com', 'http://econsultancy.com/jump/london/' }
  end

  describe 'wenttojump.com' do
    it { should_redirect 'http://wenttojump.com', 'http://econsultancy.com/jump/london/about/photos' }
  end

  describe 'e-consultancy.com' do
    it { should_redirect 'http://e-consultancy.com/reports', 'http://econsultancy.com/reports' }
  end

  def should_redirect(source, destination)
    get source
    follow_redirect!
    last_request.url.should == destination
  end
end

Nice 😉