Rack::Joint

gem 'rack-joint'

# config.ru
require 'rack/joint'

use Rack::Joint do
  host 'example.com' do
    # If you access `http://example.com/dogs/bark.html`,
    # redirect to `http://example.org/bowwow.html` with 301.
    redirect '/dogs/bark.html' do
      new_host 'example.org'
      to '/bowwow.html'
      status 301
    end

    # If you access `http://example.com/cats.html`,
    # redirect to `https://example.org/meow/mew` with 302.
    redirect '/cats.html' do
      new_host 'example.org'
      ssl true
      to '/meow/mew'
      status 302
    end
  end

  host 'example.net' do
    # If you access `http://example.net/frog.html`,
    # redirect to `http://example.net/croak` with 301.
    redirect '/frog.html' do
      to '/croak'
    end

    # If you access `http://example.net/quack`,
    # redirect to `http://example.org/quack` with 301.
    redirect '/quack' do
      new_host 'example.org'
    end
  end

  # Following description allows you to redirect to URL you set with only host replaced.
  #
  # e.g. When accessing 'http://example.io/foo/bar/baz',
  #      redirect to `http://example.org/foob/bar/baz` with 301.
  host 'example.io' do
    redirect do
      new_host 'example.org'
    end
  end
end

run lambda { |env| [200, {'Content-Type' => 'text/plain'}, ['Hello World!']] }