How to use the ykdl.compact.urlopen function in ykdl

def fetch_cna():
    url = 'https://gm.mmstat.com/yt/ykcomment.play.commentInit?cna='
    req = urlopen(url)
    cookies = req.info()['Set-Cookie']
    cna = match1(cookies, "cna=([^;]+)")
    return cna if cna else "oqikEO1b7CECAbfBdNNf1PM1"

def get_head_response(url, headers=fake_headers):
    try:
        req = Request(url, headers=headers)
        req.get_method = lambda: 'HEAD'
        response = urlopen(req)
    except IOError as e:
        # if HEAD method is not supported
        if 'HTTP Error 405' in str(e):
            req = Request(url, headers=headers)
            response = urlopen(req)
            response.close()
        else:
            raise
    # urllib will follow redirections and it's too much code to tell urllib
    # not to do that
    return response

def get_head_response(url, headers=fake_headers):
    try:
        req = Request(url, headers=headers)
        req.get_method = lambda: 'HEAD'
        response = urlopen(req)
    except IOError as e:
        # if HEAD method is not supported
        if 'HTTP Error 405' in str(e):
            req = Request(url, headers=headers)
            response = urlopen(req)
            response.close()
        else:
            raise
    # urllib will follow redirections and it's too much code to tell urllib
    # not to do that
    return response

"""Gets the content of a URL via sending a HTTP GET request.

    Args:
        url: A URL.
        headers: Request headers used by the client.
        decoded: Whether decode the response body using UTF-8 or the charset specified in Content-Type.

    Returns:
        The content as a string.
    """
    logger.debug("get_content> URL: " + url)
    req = Request(url, headers=headers, data=data)
    #if cookies_txt:
    #    cookies_txt.add_cookie_header(req)
    #    req.headers.update(req.unredirected_hdrs)
    response = urlopen(req)
    data = response.read()

    # Handle HTTP compression for gzip and deflate (zlib)
    resheader = response.info()
    if 'Content-Encoding' in resheader:
        content_encoding = resheader['Content-Encoding']
    elif hasattr(resheader, 'get_payload'):
        payload = resheader.get_payload()
        if isinstance(payload, str):
            content_encoding =  match1(payload, r'Content-Encoding:\s*([\w-]+)')
        else:
            content_encoding = None
    else:
        content_encoding = None
    if content_encoding == 'gzip':
        data = ungzip(data)