Restful Authentication提供了基于Restful形式的身份认证功能，包括email激活，登陆跳转等等功能。
1. 创建工程：
$rails test_restful_authentication
$cd test_restful_authentication
2. 安装插件：
$script/plugin install http://svn.techno-weenie.net/projects/plugins/restful_authentication
3. 生成测试模型和数据表：
$script/generate authenticated user sessions --include-activation
$script/generate scaffold post title:string body:text
$rake db:migrate
4. 增加routes：
#config/routes.rb
map.activate '/activate/:activation_code', :controller => 'users', :action => 'activate'
map.signup '/signup', :controller => 'users', :action => 'new'
map.login '/login', :controller => 'sessions', :action => 'new'
map.logout '/logout', :controller => 'sessions', :action => 'destroy'
5. 修改配置文件：
#config/environments.rb
config.active_record.observers = :user_observer
6. 增加邮件通知功能（这里用的是gmail）：
$script/plugin install http://svn.douglasfshearer.com/rails/plugins/action_mailer_optional_tls
#config/environment.rb
require 'smtp_tls'
ActionMailer::Base.delivery_method = :smtp
ActionMailer::Base.default_charset = "utf-8"
ActionMailer::Base.smtp_settings = {
:tls => true,
:address => "smtp.gmail.com",
:port => "587",
:authentication => :plain,
:user_name => "flyerhzm",
:password => "xxx"
}
#app/models/user_mailer.rb
def setup_email(user)
@recipients = "#{user.email}"
@from = "flyerhzm@gmail.com"
@subject = "www.flyerhzm.com "
@sent_on = Time.now
@body[:user] = user
end
7. 设置需要控制的controller：
#app/controllers/application.rb
include AuthenticatedSystem
#app/controllers/posts_controller
before_filter :login_required
8. 修改layout，增加header：
#app/views/layout/application.html.erb
<% if logged_in? -%>
<%= current_user.login %> |
<%= link_to '推出', logout_path %>
<% else -%>
<%= link_to '登录', login_path %> |
<%= link_to '注册', new_user_path %>
<% end -%>
