使用Rails自动登录？

我正在尝试使用Rails的Restful-Authentication插件创建一个简单的身份验证系统,我只是想知道它是如何工作的,b/c我似乎无法弄清楚Cookie的要求是什么,以及如何使它成为现实浏览器总是记得你(6个月以上).

几个问题:

1)你如何为ruby的restful_authentication做记住_me？我似乎无法找到一个好的单线来解决这个问题......

如果用户注册并检查"记住我",那么rails应用程序如何在用户不做任何事情的情况下获取会话/ cookie,而是在下次访问该页面时进入该页面,比如3个月后？

2)我是否需要向服务器发送某种信息,比如他们的IP地址或其他什么？什么cookies[:auth_token],定义在哪里？

目标是:我不希望他们再次输入他们的电子邮件/密码,就像StackOverflow如何工作:)

这是我们正在做的事情(主要来自经过身份验证的系统)...这是处理我们正在运行的登录的控制器方法...

def login
  if logged_in?
    flash[:notice] = "You are already logged in."
    redirect_to "/" and return
  end
  unless request.post?
    render :layout => 'task' and return
  end
  self.current_user = User.authenticate(params[:login], params[:password])
  if logged_in?
    if params[:remember_me].to_i == 1
      self.current_user.remember_me
      cookies[:auth_token] = {:domain => "#{DOMAIN}", :value => self.current_user.remember_token , :expires => self.current_user.remember_token_expires_at }
    else
      self.current_user.forget_me
      cookies.delete(:auth_token, :domain => "#{DOMAIN}")
      cookies[:auth_token] = nil
    end
    current_user.last_seen_at = Time.now 
    current_user.save
    session[:notice] = "You logged in successfully"
    flash[:notice] = "You logged in successfully"
    redirect_back_or_default(:controller => 'dashboard') and return
    #redirect_back_or_default(:controller => 'index', :action => 'index') and return
  else
    if $failed_login_counter.add_attempt(params[:login]) > MAXIMUM_LOGIN_ATTEMPTS
      logger.info("login rate limiter kicking in, #{MAXIMUM_LOGIN_ATTEMPTS} login attempts failed")
      redirect_to "/denied.html" and return
    end
    flash[:error] = "Unable to authenticate username and password"
    render(:layout => 'task') and return
  end
end

并使用它来注销

def logout
  current_user.last_seen_at = Time.now 
  current_user.save
  self.current_user.forget_me if logged_in?
  cookies.delete(:auth_token, :domain => "#{DOMAIN}")
  reset_session
  flash[:notice] = "You have been logged out."
  #redirect_to :back
  redirect_back_or_default(:controller => 'index', :action => 'index') and return
end

然后 - 在你的application.rb中你需要这样的东西:

before_filter :login_from_cookie

def login_from_cookie
  return unless cookies[:auth_token] && !logged_in?
  user = User.find_by_remember_token(cookies[:auth_token])
  if user && user.remember_token?
    user.remember_me
    self.current_user = user
    cookies[:auth_token] = { :domain => "#{DOMAIN}", :value => self.current_user.remember_token , :expires => self.current_user.remember_token_expires_at }
    flash[:notice] = "#{self.current_user.login}, you have logged in successfully"
  end
end

并且 - 在您的用户模型中有一些像这样的方法:

# Encrypts some data with the salt.
def self.encrypt(password, salt)
  Digest::SHA1.hexdigest("--#{salt}--#{password}--")
end

# Encrypts the password with the user salt
def encrypt(password)
  self.class.encrypt(password, salt)
end

def remember_token?
  remember_token_expires_at && Time.now.utc < remember_token_expires_at 
end

# These create and unset the fields required for remembering users between browser closes
def remember_me
  self.remember_token_expires_at = 2.weeks.from_now.utc
  self.remember_token            = encrypt("#{email}--#{remember_token_expires_at}")
  save(false)
end

def forget_me
  self.remember_token_expires_at = nil
  self.remember_token            = nil
  save(false)
end