tool_outbound.py 文件源码

def generate_launch_request(self, **kwargs):
        """
        returns a Oauth v1 "signed" requests.PreparedRequest instance
        """

        if not self.has_required_params():
            raise InvalidLTIConfigError(
                'Consumer\'s launch params missing one of '
                + str(LAUNCH_PARAMS_REQUIRED)
            )

        params = self.to_params()
        r = Request('POST', self.launch_url, data=params).prepare()
        sign = OAuth1(self.consumer_key, self.consumer_secret,
                                signature_type=SIGNATURE_TYPE_BODY, **kwargs)
        return sign(r)