import requests

def axis_exec(camera, cmd):
    if is_string(camera):   
        camera = get_device(camera)
    url = camera.url
    s="axis-cgi/"
    ctrl_url =  url[0:url.find(s) + len(s)] + "com/ptz.cgi?"
    cmd_url=ctrl_url+cmd
    response = requests.get(url=cmd_url)
    if 200<=response.status_code<300: 
        return response.text.strip()
    raise Exception(response.text)
    

def axis_move(camera, direction):
    direction=str(direction)
    if direction not in ("home", "up", "down", "left", "right", "upleft", "upright", "downleft", "downright", "stop"):
        raise Exception("Invalid direction: " + direction)
    return axis_exec(camera, "move="+direction)

def axis_rzoom(camera, steps):
    steps= int(steps)
    if steps<-9999  or steps>9999:
        raise Exception("Invalid relative zoom steps: " + str(steps))
    return axis_exec(camera, "rzoom="+str(steps))