lti.py 文件源码

def launch_lti() -> t.Any:
    """Do a LTI launch.

    .. :quickref: LTI; Do a LTI Launch.
    """
    lti = {
        'params': CanvasLTI.create_from_request(flask.request).launch_params,
        'exp': datetime.datetime.utcnow() + datetime.timedelta(minutes=1)
    }
    return flask.redirect(
        '{}/lti_launch/?inLTI=true&jwt={}'.format(
            app.config['EXTERNAL_URL'],
            urllib.parse.quote(
                jwt.encode(
                    lti, app.config['LTI_SECRET_KEY'], algorithm='HS512'
                ).decode('utf8')
            )
        )
    )