Redirect 'myapp.com' to 'www.myapp.com' in rails without using htaccess?

Question

Using Morph Labs' Appspace to deploy a site means no automated way to redirect 'myapp.com' to 'www.myapp.com' (and no access to .htacess).

Is there an in-rails way to do this? Would I need a plugin like subdomain-fu?

More specifically, I'm trying to do something like:

• 'myapp.com' => 'www.myapp.com'
• 'myapp.com/session/new' => 'www.myapp.com/session/new'

Basically, I always want the 'www' subdomain prepended on every request (because the SSL cert specifically has a common name of 'www.myapp.com').

Answer 1

Here is a couple of different ways:

 head :moved_permanently, :location => ‘http://www.newdomain.com’

another:

def rails_301
headers["Status"] = "301 Moved Permanently"
redirect_to "http://www.newdomain.com"
end

Answer 2

Maybe something like this would do the trick:

class ApplicationController < ActionController::Base
  before_filter :check_uri

  def check_uri
    redirect_to request.protocol + "www." + request.host_with_port + request.request_uri if !/^www/.match(request.host)
  end
end

Answer 3

Carson's answer works great.

Here's the code to go the other way (www -> no www)

before_filter :check_uri

def check_uri
  if /^www/.match(request.host)
    redirect_to request.protocol + request.host_with_port[4..-1] + request.request_uri 
  end
end

Answer 4

Thanks for that! I was trying heroku's "ensure domain filter" with no success, this is much cleaner and it works for me.

Answer 5

This worked great for me. I did make one small addition as I only wanted this behavior in my production environment:

def check_uri
  redirect_to request.protocol + "www." + request.host_with_port + request.request_uri if !/^www/.match(request.host) if Rails.env == 'production'
end

Answer 6

I know this is answered, but I thought everyone else should know about the CodeRack: Canonical Host solution. This is really nice as it allows for env specific redirects. http://coderack.org/users/tylerhunt/middlewares/6-canonical-host