How to use the ykdl.util.html.add_header function in ykdl

def prepare(self):
        add_header("Cookie", '__ysuid=%d' % time.time())

        info = VideoInfo(self.name)

        if not self.vid:
             self.vid = match1(self.url.split('//', 1)[1],
                               '^v[^\.]?\.[^/]+/v_show/id_([a-zA-Z0-9=]+)',
                               '^player[^/]+/(?:player\.php/sid|embed)/([a-zA-Z0-9=]+)',
                               '^static.+loader\.swf\?VideoIDS=([a-zA-Z0-9=]+)',
                               '^(?:new-play|video)\.tudou\.com/v/([a-zA-Z0-9=]+)')

        if not self.vid:
            html = get_content(self.url)
            self.vid = match1(html, r'videoIds?[\"\']?\s*[:=]\s*[\"\']?([a-zA-Z0-9=]+)')

        if self.vid.isdigit():
            import base64

def prepare(self):
        info = VideoInfo(self.name)
        pid = match1(self.url, 'show/(.*)')
        if 'vmobile' in self.url:
            self.url = 'https://v.douyu.com/show/' + pid

        html = get_content(self.url)
        info.title = match1(html, u'title>(.+?)_斗鱼视频 - 最6的弹幕视频网站<')
        self.vid = match1(html, '"point_id":\s?(\d+)')

        js_enc = get_h5enc(html, self.vid)
        params = {'vid': pid}
        ub98484234(js_enc, self, params)

        add_header("Referer", self.url)
        add_header('Cookie', 'dy_did={}'.format(params['did']))

        data = urlencode(params)
        if not isinstance(data, bytes):
            data = data.encode()
        html_content = get_content('https://v.douyu.com/api/stream/getStreamUrl', data=data)
        self.logger.debug('video_data: ' + html_content)

        video_data = json.loads(html_content)
        assert video_data['error'] == 0, video_data

        for video_profile, stream_date in video_data['data']['thumb_video'].items():
            if not stream_date:
                continue
            stream = self.profile_2_id[video_profile]
            info.stream_types.append(stream)
            info.streams[stream] = {

def prepare(self):
        info = VideoInfo(self.name, True)
        add_header("Referer", 'https://www.douyu.com')

        html = get_content(self.url)
        self.vid = match1(html, '\$ROOM\.room_id\s*=\s*(\d+)',
                                'room_id\s*=\s*(\d+)',
                                '"room_id.?":(\d+)',
                                'data-onlineid=(\d+)')
        title = match1(html, 'Title-headlineH2">([^<]+)<')
        artist = match1(html, 'Title-anchorName" title="([^"]+)"')

        if not title or not artist:
            html = get_content('https://open.douyucdn.cn/api/RoomApi/room/' + self.vid)
            room_data = json.loads(html)
            if room_data['error'] == 0:
                room_data = room_data['data']
                title = room_data['room_name']
                artist = room_data['owner_name']

def prepare(self):
        info = VideoInfo(self.name)
        pid = match1(self.url, 'show/(.*)')
        if 'vmobile' in self.url:
            self.url = 'https://v.douyu.com/show/' + pid

        html = get_content(self.url)
        info.title = match1(html, u'title>(.+?)_斗鱼视频 - 最6的弹幕视频网站<')
        self.vid = match1(html, '"point_id":\s?(\d+)')

        js_enc = get_h5enc(html, self.vid)
        params = {'vid': pid}
        ub98484234(js_enc, self, params)

        add_header("Referer", self.url)
        add_header('Cookie', 'dy_did={}'.format(params['did']))

        data = urlencode(params)
        if not isinstance(data, bytes):
            data = data.encode()
        html_content = get_content('https://v.douyu.com/api/stream/getStreamUrl', data=data)
        self.logger.debug('video_data: ' + html_content)

        video_data = json.loads(html_content)
        assert video_data['error'] == 0, video_data

        for video_profile, stream_date in video_data['data']['thumb_video'].items():
            if not stream_date:
                continue
            stream = self.profile_2_id[video_profile]
            info.stream_types.append(stream)

'k_uid': get_macid(24),
        'qdx': 'n',
        'qdv': 3,
        'qd_v': 1,
        'dfp': get_random_str(66),
        'v': 1,
        'k_err_retries': 0,
        'tm': int(tm + 1),
    }
    src = '/live?{}'.format(urlencode(params))
    vf = cmd5x(src)
    req_url = '{}{}&vf={}'.format(host, src, vf)
    st = int(tm * 1000)
    et = int((tm + 1296000) * 1000)
    c_dfp = '__dfp={}@{}@{}'.format(params['dfp'], et, st)
    add_header('Cookie', c_dfp)
    html = get_content(req_url)
    return json.loads(html)

from . import live as s
        return s.site, url
    elif 'vc.bilibili' in url:
        from . import vc as s
        return s.site, url
    elif '/bangumi/' in url:
        from . import bangumi as s
        return s.site, url

    av_id = match1(url, '(?:/av|aid=)(\d+)')
    page_index = match1(url, '(?:page|\?p)=(\d+)', 'index_(\d+)\.') or '1'
    if page_index == '1':
        url = 'https://www.bilibili.com/av{}/'.format(av_id)
    else:
        url = 'https://www.bilibili.com/av{}/?p={}'.format(av_id, page_index)
    add_header('Referer', 'https://www.bilibili.com/')
    url = get_location(url)

    if '/bangumi/' in url:
        from . import bangumi as s
    else:
        from . import video as s

    return s.site, url

def prepare(self):
        add_default_handler(HTTPCookieProcessor)
        install_default_handlers()
        add_header('Referer', self.url)
        add_header('User-Agent', ua)

        info = VideoInfo(self.name)
        if self.url and not self.vid:
            self.vid = match1(self.url, 'https?://www.mgtv.com/b/\d+/(\d+).html')
            if self.vid is None:
                html = get_content(self.url)
                self.vid = match1(html, 'vid=(\d+)', 'vid=\"(\d+)', 'vid: (\d+)')

        did = str(uuid.uuid4())
        tk2 = generate_tk2(did)

        api_info_url = 'https://pcweb.api.mgtv.com/player/video?tk2={}&video_id={}&type=pch5'.format(tk2, self.vid)
        meta = json.loads(get_content(api_info_url))

        assert meta['code'] == 200, '[failed] code: {}, msg: {}'.format(meta['code'], meta['msg'])
        assert meta['data'], '[Failed] Video info not found.'

def __init__(self):
        SimpleExtractor.__init__(self)
        add_header('User-Agent', 'Baiduspider')

def prepare(self):
        add_default_handler(HTTPCookieProcessor)
        install_default_handlers()
        add_header('Referer', self.url)
        add_header('User-Agent', ua)

        info = VideoInfo(self.name)
        if self.url and not self.vid:
            self.vid = match1(self.url, 'https?://www.mgtv.com/b/\d+/(\d+).html')
            if self.vid is None:
                html = get_content(self.url)
                self.vid = match1(html, 'vid=(\d+)', 'vid=\"(\d+)', 'vid: (\d+)')

        did = str(uuid.uuid4())
        tk2 = generate_tk2(did)

        api_info_url = 'https://pcweb.api.mgtv.com/player/video?tk2={}&video_id={}&type=pch5'.format(tk2, self.vid)
        meta = json.loads(get_content(api_info_url))

        assert meta['code'] == 200, '[failed] code: {}, msg: {}'.format(meta['code'], meta['msg'])