如何在GAE Python中使用Facebook Graph API获取用户电子邮件？

Question

我在Google App Engine上使用Facebook Graph API.我能够从用户那里获取所有基本信息.但是,当我尝试获取需要权限的任何用户信息时,例如发送电子邮件,它始终显示为"无".我已经按照开发人员博客上提供的整个教程进行了操作.

这是我的代码:

class User(db.Model):
    id = db.StringProperty(required=True)
    created = db.DateTimeProperty(auto_now_add=True)
    updated = db.DateTimeProperty(auto_now=True)
    name = db.StringProperty(required=True)
    email = db.StringProperty(required=True)
    profile_url = db.StringProperty(required=True)
    access_token = db.StringProperty(required=True)


class BaseHandler(webapp.RequestHandler):
    """Provides access to the active Facebook user in self.current_user

    The property is lazy-loaded on first access, using the cookie saved
    by the Facebook JavaScript SDK to determine the user ID of the active
    user. See http://developers.facebook.com/docs/authentication/ for
    more information.
    """
    @property
    def current_user(self):
        if not hasattr(self, "_current_user"):
            self._current_user = None
            cookie = facebook.get_user_from_cookie(
                self.request.cookies, FACEBOOK_APP_ID, FACEBOOK_APP_SECRET)
            if cookie:
                # Store a local instance of the user data so we don't need
                # a round-trip to Facebook on every request
                user = User.get_by_key_name(cookie["uid"])
                if not user:
                    graph = facebook.GraphAPI(cookie["access_token"])
                    profile = graph.get_object("me")
                    user = User(key_name=str(profile["id"]),
                                id=str(profile["id"]),
                                name=profile["name"],
                                email=profile["email"],
                                profile_url=profile["link"],
                                access_token=cookie["access_token"])
                    user.put()
                elif user.access_token != cookie["access_token"]:
                    user.access_token = cookie["access_token"]
                    user.put()
                self._current_user = user
        return self._current_user

这是模板/ HTML:

<fb:login-button autologoutlink="true" perms="email"></fb:login-button>

{% if current_user %}
  <p><a href="{{ current_user.profile_url }}"><img src="http://graph.facebook.com/{{ current_user.id }}/picture?type=square"/></a></p>
  <p>Hello, {{ current_user.name|escape }}</p>
  <p>email: {{ current_user.email }} </p>
{% endif %}

有什么不对？是否有其他方式来获取用户电子邮件？

Answer 1

只是放弃使用facebook.py和facebookoauth.py并使用 urlfetch 制作了我自己的 OAuth 2 客户端。请参阅Facebook 文档中的“在 Web 应用程序中对用户进行身份验证”。

另外，我scope='email'向https://graph.facebook.com/oauth/authorize?和提出了请求https://graph.facebook.com/oauth/access_token?。