Rails 3应用程序 - 与Facebook连接的最佳方式

Question

我们对Rails很陌生，希望使用我们主页上的Javascript SDK“Connect with Facebook”按钮。在我们的应用中使用此按钮，我们希望允许用户通过Facebook注册我们的网站，并能够将他们的Facebook个人资料图片用作我们网络应用的个人资料图片。

用我们的Rails 3应用程序实现这个Facebook连接的最佳方式是什么？

devise_for :users 

    resources :authentications 

    resources :users do 
     member do 
     get :following, :followers 
     end 
    end 
    resources :sessions, :only => [:new, :create, :destroy] 
    resources :microposts, :only => [:create, :destroy] 
    resources :relationships, :only => [:create, :destroy] 

    match '/signup', :to => 'users#new' 
    match '/signin', :to => 'sessions#new' 
    match '/signout', :to => 'sessions#destroy' 
    match '/contact', :to => 'pages#contact' 
    match '/home', :to => 'pages#home' 
    match '/help', :to => 'pages#help' 
    match '/feedback', :to => 'pages#feedback' 
    match '/privacy', :to => 'pages#privacy' 
    match '/terms', :to => 'pages#terms' 
    match '/',  :to => 'pages#home' 

    resources :microposts 

    resources :users 
    resources :sessions, :only => [:new, :create, :destroy] 


    root :to => 'pages#home' 

    match "/auth/twitter/callback" => "sessions#omnicreate" 
    match "/auth/facebook/callback" => "sessions#omnicreate" 


end 

SessionsController

class SessionsController < ApplicationController 

    def new 
    @title = "Sign in" 
    end 

    def create 
     user = User.authenticate(params[:session][:email], 
          params[:session][:password]) 
     if user.nil? 
     flash.now[:error] = "Invalid email/password combination." 
     @title = "Sign in" 
     render 'new' 
     else 
     sign_in user 
     redirect_back_or user 
     end 
    end 

    def destroy 
     sign_out 
     redirect_to root_path 
    end 
end 

Answer 1

看起来你需要做两件事情：

改变你的路线这些行文件：

root :to => 'pages#home' 

    match "/auth/twitter/callback" => "sessions#omnicreate" 
    match "/auth/facebook/callback" => "sessions#omnicreate" 

要这样：

match "/auth/:provider/callback" => "sessions#omnicreate" 

    root :to => 'pages#home' # this one should always be last 

Twitter和Facbook打算同样的方法，所以你需要得到:provider以后才能找出它发送给它的Twitter或Facebook。

接下来你需要在你SessionsController接收这样的回调来创建一个方法：

def omnicreate 

    data = request.env['omniauth.auth'] # here is all the user data 
    if params[:provider] == 'twitter' 
    #parse twitter data 
    elsif params[:provider] == 'facebook' 
    #parse fb data 
    else 
    # something is broken 
    redirect_to '/404.html' 
    end 

    user = User.create! #use data you parsed to create a user 
    redirect_to some_path, :notice => 'awwww yeah' 
end 

好运！

Answer 2

的omniauth宝石是通过第三方服务来设置身份验证的好方法。他们有一个Facebook战略。我已经使用它，并且设置起来很简单。只需要将你的api键放在轨道初始化器中。