rails 3 + devise: how do I make the email confirmation links use secure https (not http)

Question

How to I tell Devise to use https (not http) for all the account confirmation and password reminder etc links?

[note: I\'m not looking for a solution to redirect all

Answer 1

To set the protocol but also a subdirectory :

config.action_mailer.default_url_options = {
        :host => "www.example.com",
        :protocol => 'https',
        :only_path => false,
        :script_name => "/app" #add this attribute if your app is deployed in a subdirectory
    }

Source