Force www. in rails

Question

I'm normally used to using .htaccess files to force a domain to use www. (i.e. http://www.example.com instead of http://example.com):

#Options +Indexes
RewriteEngine on
RewriteBase /

Redirect permanent "www.example.com" "http://www.example.com"
Redirect permanent "example.com" "http://www.example.com"

However this doesn't work in a rails app. What is the rails alternative to this?

Answer 1

Check this

RewriteEngine on
RewriteCond %{HTTP_HOST} ^(example\.com)(:80)? [NC]
RewriteRule ^(.*) http://www.example.com/$1 [R=301,L]
order deny,allow

Taken from http://www.htaccesseditor.com/en.shtml#a_WWW

Note: The .htaccess file should be put inside the public folder of the Rails project.

Answer 2

If you're on a newer Rails version, an alternative to using Apaches mod_rewrite would be using the Canonical Host Rack middleware.