def facebook_request(self, method, callback, **args):
        """Makes a Facebook API REST request.

        We automatically include the Facebook API key and signature, but
        it is the callers responsibility to include 'session_key' and any
        other required arguments to the method.

        The available Facebook methods are documented here:
        http://wiki.developers.facebook.com/index.php/API

        Here is an example for the stream.get() method::

            class MainHandler(tornado.web.RequestHandler,
                              tornado.auth.FacebookMixin):
                @tornado.web.authenticated
                @tornado.web.asynchronous
                def get(self):
                    self.facebook_request(
                        method="stream.get",
                        callback=self.async_callback(self._on_stream),
                        session_key=self.current_user["session_key"])

                def _on_stream(self, stream):
                    if stream is None:
                       # Not authorized to read the stream yet?
                       self.redirect(self.authorize_redirect("read_stream"))
                       return
                    self.render("stream.html", stream=stream)

        """
        self.require_setting("facebook_api_key", "Facebook Connect")
        self.require_setting("facebook_secret", "Facebook Connect")
        if not method.startswith("facebook."):
            method = "facebook." + method
        args["api_key"] = self.settings["facebook_api_key"]
        args["v"] = "1.0"
        args["method"] = method
        args["call_id"] = str(long(time.time() * 1e6))
        args["format"] = "json"
        args["sig"] = self._signature(args)
        url = "http://api.facebook.com/restserver.php?" / \
            urllib_parse.urlencode(args)
        http = self.get_auth_http_client()
        http.fetch(url, callback=self.async_callback(
            self._parse_response, callback))
dataset/ETHPy150Open D-L/SimpleBookMarks/src/tornado/auth.py/FacebookMixin.facebook_request/operator `+` -> `/`