def verify_node():

    preId = request.args.get('a',0,type = str)
    curId = request.args.get('b',0,type = str)

    msgId = request.args.get('c',0,type = int)
    # re = SendMessage.check_node_in_path(a, b)
    if not SendMessage.check_node_in_path(int(preId), int(curId), int(msgId)):
        r = 0
    else:
        r = 1

    return jsonify(result = r)