ruby-on-rails - 使用 Rails 自动登录？

Question

我正在尝试使用 Rails 的 Restful-Authentication 插件建立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，以及如何使它如此浏览器始终记得您(6 个月以上)。

几个问题:

1)你如何为ruby的restful_authentication做remember_me's？我似乎找不到一个好的单线来解决这个问题......

如果用户注册并选中“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 session /cookie，只是在他们下次访问该页面时访问该页面，比如说 3 个月后？

2)我是否需要向服务器发送某种信息，例如他们的 IP 地址之类的？什么是cookies[:auth_token] ，在哪里定义的？

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 的工作方式一样:)

Answer 1

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 Controller 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 - 在您的 application.rb 中，您将需要以下内容:

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 User 模型中有一些这样的方法:

# 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