How do I set a cookie with a (ruby) rack middleware component?

Question

I\'m writing a rack middleware component for a rails app that will need to conditionally set cookies. I am currently trying to figure out to set cookies. From googling around

Answer 1

You can also use the Rack::Utils library to set and delete headers without creating a Rack::Response object.

class RackApp
  def initialize(app)
    @app = app
  end

  def call(env)
    status, headers, body = @app.call(env)

    Rack::Utils.set_cookie_header!(headers, "foo", {:value => "bar", :path => "/"})

    [status, headers, body]
  end
end