用户授权后，Facebook的iframe应用程式被重定向到画布外 [英] Facebook iframe app being redirected out of canvas after user authorization

问题描述

在用户授权应用程序后，我的Facebook应用正在重定向到画布网址（http：// my-domain / app）。步骤的步骤如下所述：

My facebook app is being redirected to the canvas url (http://my-domain/app) after the user has authorized the app. The sequence of steps is described below:

1）新用户在画布中打开应用程序，并通过Javascript重定向重定向到oauth权限对话框

1) A new user opens the app in canvas and is redirected to oauth permissions dialog via Javascript redirection

2）一旦用户授权了应用程序，就会调用该应用的redirect_uri，并获得我在会话中保存的访问令牌

2) Once the user has authorized the app, the redirect_uri of the app is called and I get the access token which I save in session

3）我也得到授权用户的用户ID并将其保存到会话

3) I also get the user id of the authorized user and save it to session

4）当我将其重定向到画布网址时，它移出Facebook画布

4) When I redirect it to the canvas url, it moves out of the facebook canvas

5）如果我尝试将其重定向到画布页面（http://apps.facebook.com/app_name），它会陷入无限循环，因为会话值被清除，重复过程 - 我不知道为什么。

5) If I try to redirect it to the canvas page (http://apps.facebook.com/app_name) it gets stuck in an infinite loop because the session values are cleared and the process is repeated - I don't know why.

这是一个rails 3应用程序，我使用的是koala gem。代码如下所示：

It is a rails 3 app and I am using koala gem. The code is shown below:

  def index
    if (session[:access_token].blank?)
    session[:oauth] = Koala::Facebook::OAuth.new(APP_ID, APP_SECRET, oauth_redirect_url)
    end
    @app_id = APP_ID
  end

  def redirect
    session[:access_token] = session[:oauth].get_access_token(params[:code]) if params[:code]
    if session[:access_token].blank?
      flash[:error] = "You didn't authorize the application. Please authorize the application to throw a firecracker on your friend's wall!"
      redirect_to :action => "authorize_app" and return
    else
      session[:fb_user_id] = Koala::Facebook::API.new(session[:access_token]).get_object("me")["id"]
    end
    redirect_to :action => "index"
  end

我已经浪费了将近一天的时间来修复它，并且搜索对于一个解决方案，但是现在没有这个。

I have wasted almost a day trying to fix it, and searching for a solution, but no luch as of now.

推荐答案

步骤1，步骤2，步骤3 可以

步骤4：当用户授权您的应用程序时，它将被重定向到yourapp.com（画布网址）
在画布网址，您可以：

Step 4: When the user authorize your app, it will be redirected to yourapp.com (canvas url) at canvas url, you'll do:

<script>
window.top.location='https://apps.facebook.com/yourapp' //(canvas page)
</script>

步骤5：当您的画布页面被调用时，您将获得 signed_request 然后用你的fb api你会解析它。

step 5: as your canvas page is called you'll get signed_request then with your fb api you'll parse it.

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