How to perform 301 before force_ssl? Rails 3.1

问题

I need to make http://example.com go to https://www.example.com. right now it's warning in the browser. I followed: http://www.simonecarletti.com/blog/2011/05/configuring-rails-3-https-ssl/

loading from /lib/middleware (Rails 3.1)

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

  def call(env)
    request = Rack::Request.new(env)
    if request.host.starts_with?("example.com")
      [301, {"Location" => request.url.sub("//", "//www.")}, self]
    else
      @app.call(env)
    end
  end

  def each(&block)
  end
end

production env

Example::Application.configure do

  config.force_ssl = true

  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
  # config.force_ssl = true

  config.middleware.use "WwwMiddlewareRedirect"
end

回答1:

If you can get your webserver to do the redirect, that's usually best. If you're on Heroku or a similar platform where you can't get the webserver to redirect for you, make these changes:

Change the middleware line to be:

config.middleware.insert_before Rack::SSL, "WwwMiddlewareRedirect"

Then in your gemfile, include:

gem 'rack-ssl', :require => 'rack/ssl'

回答2:

Unless I'm misunderstanding, I think you are using the < 3.1 instructions for a 3.1 app. In 3.1 you only need to set force_ssl to true and it will result in the behavior you desire.

来源：https://stackoverflow.com/questions/7959860/how-to-perform-301-before-force-ssl-rails-3-1