Tornado框架(FacebookGraphMixin)

Question

我想尝试从我的Facebook应用程序向使用Tornado Framework的用户发送应用程序请求。我一直在关注http://www.tornadoweb.org/documentation/auth.html，但是我不知道如何解决这个错误。外面有专业人士吗？谢谢!

错误日志

Traceback (most recent call last):
  File "send.py", line 36, in <module>
    main()
  File "send.py", line 33, in main
    test.get(app_access_token, player_id)
  File "send.py", line 15, in get
    callback=self.async_callback(self._on_post))
AttributeError: 'Send' object has no attribute 'async_callback'

代码

import tornado.auth
import tornado.escape
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
from tornado import httpclient

class Send(tornado.auth.FacebookGraphMixin):
    def get(self, app_access_token, player_id):
        self.facebook_request(
            "/"+player_id+"/apprequests",
            post_args={"message": "I am an app request from my Tornado application!"},
            access_token=app_access_token,
            callback=self.async_callback(self._on_post))

    def _on_post(self, new_entry):
        if not new_entry:
            # Call failed; perhaps missing permission?
            self.authorize_redirect()
            return
        self.finish("Posted a message!")

def main():
    key = "xxxxxxxxxxx"
    secret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    player_id = "100003395454290" #fake id
    http_client = httpclient.HTTPClient()
    response = http_client.fetch("https://graph.facebook.com/oauth/access_token?grant_type=client_credentials&client_id="+key+"&client_secret="+secret+"&redirect_uri=&code=")
    app_access_token = response.body.replace("access_token=","")

    test = Send()
    test.get(app_access_token, player_id)

if __name__ == "__main__":
    main()

Answer 1

好吧，我的答案并没有直接回答操作员的问题。但是在错误AttributeError: 'XxxxxHandler' object has no attribute 'async_callback'的顶部搜索结果中显示了以下内容

值得注意的是，在启动TornadoV4.0时，async_callback函数已被删除。引用Backwards-compatibility notes

RequestHandler.async_callback和WebSocketHandler.async_callback包装器函数已被删除；由于堆栈上下文(以及最近的协程)，它们已经过时很长一段时间了。

Answer 2

看起来你忘了继承tornado.web.RequestHandler的子类。更改：

class Send(tornado.auth.FacebookGraphMixin):

至：

class Send(tornado.web.RequestHandler, tornado.auth.FacebookGraphMixin):