facebook - 如何为 facebook 画布应用程序配置 spring-social-facebook

Question

看Keith Donald和Roger Hughes 的spring 教程，流程如下；

IF user is signed in to to application THEN 
    IF user is signed in to Facebook
        read Facebook data, 
        display Facebook data
    ELSE (facebook handles) 
        ask user to loging to Facebook
        goto if user is signed in to Facebook step
    ENDIF
ELSE 
    ask user to sign in
    create user object with an id 
    when user has signed in, go back to the beginning
END IF

但是，由于我的应用程序将在 facebook 画布上运行，我想跳过登录到应用程序阶段（因为作为用户显式登录到已经在 facebook 上运行的我的应用程序是没有意义的），流程是会是这样的；

    create a user (session scope)
    IF user is signed in to Facebook
        update user object with facebook id
        read Facebook data, 
        display Facebook data
    ELSE (facebook handles) 
        ask user to loging to Facebook
        goto if user is signed in to Facebook step
    ENDIF

真的很感激样品。

Answer 1

我刚刚注意到gitspring-social-samples上有一个专门用于画布的示例。