Rack Middleware to force all http requests to https

force_ssl.rb

# Rack Middleware to force all http requests to https
# Alternately you could do this with an Apache or Nginx rewrite
#
# Install this middleware in conf/environments/production.rb
#   config.middleware.use "ForceSSL"
#
# You can optionally set the host name for the redirect
#   config.middleware.use "ForceSSL", "example.com"
#
class ForceSSL
   
  def initialize(app, host = nil)
    @app = app
    @host = host
  end

  def call(env)
    request = Rack::Request.new(env)
    if request.scheme == 'http'
      host = @host || request.host
      [301, { 'Location' => "https://#{host}#{request.fullpath}" }, ['Redirecting...']]
    else
      @app.call(env)
    end
  end

end