使OmniAuth，Devise和Koala一起工作 [英] Making OmniAuth, Devise and Koala work together

问题描述

我有一个应用程序，我正在使用devise和omniauth来实现身份验证。我得到了登录/退出等等，我想知道的是，什么是最有效的方式来连接到用户图形api终点初始化并准备在我的应用程序中使用。

I have an app in which I am implementing authentication using devise and omniauth. Ive got the logging in / out etc figured out, what i wanted to know was, what is the most efficient way to have a connection to the users graph api end point initialised and ready for use within my application.

例如：如果在我想做的个人资料页面上，

eg: If on the profile page i wanted to do,

profile_image = current_user.fbgraph.get_picture("me")

API调用次数（我将在整个应用程序中使用类似的调用）

How would I accomplish this with the least number of API calls (i will be using similar calls throughout the application)

推荐答案

您可以使用类似考拉。当您验证用户时，您可以抓取访问令牌。假设您遵循 Devise / Omniauth教程，您可以做一些事情像这样：

You can accomplish this using something like Koala. When you authenticate the user, you can grab the access token. Assuming you've followed the Devise/Omniauth tutorial, you could do something like so:

  def self.find_for_facebook_oauth(response, signed_in_resource=nil)
    data = response['extra']['user_hash']
    access_token = response['credentials']['token']
    user = User.find_by_email(data["email"])
    # only log in confirmed users
    # that way users can't spoof accounts
    if user and user.confirmed?
      user.update_attribute('fb_access_token', access_token) 
      user
    end
  end

一旦你有访问令牌，你可以这样做：

Once you have the access token, you could then do something like:

@graph = Koala::Facebook::API.new(@user.fb_access_token)
profile_image = @graph.get_picture("me")

在我的应用程序中，我查看当Facebook的回调来自用户时是否登录。如果是，我认为这个请求是链接帐户。如果没有，我认为这是一个登录请求。

In my app, I check to see if a user is logged in when the callback from Facebook comes. If they are, I assume the request was to link accounts. If they're not, I assume it's a login request.

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