yt_dlp/downloader/niconico.py

   1 import json
   2 import threading
   3 import time
   4
   5 from . import get_suitable_downloader
   6 from .common import FileDownloader
   7 from .external import FFmpegFD
   8 from ..networking import Request
   9 from ..utils import DownloadError, WebSocketsWrapper, str_or_none, try_get
  10
  11
  12 class NiconicoDmcFD(FileDownloader):
  13     """ Downloading niconico douga from DMC with heartbeat """
  14
  15     def real_download(self, filename, info_dict):
  16         from ..extractor.niconico import NiconicoIE
  17
  18         self.to_screen('[%s] Downloading from DMC' % self.FD_NAME)
  19         ie = NiconicoIE(self.ydl)
  20         info_dict, heartbeat_info_dict = ie._get_heartbeat_info(info_dict)
  21
  22         fd = get_suitable_downloader(info_dict, params=self.params)(self.ydl, self.params)
  23
  24         success = download_complete = False
  25         timer = [None]
  26         heartbeat_lock = threading.Lock()
  27         heartbeat_url = heartbeat_info_dict['url']
  28         heartbeat_data = heartbeat_info_dict['data'].encode()
  29         heartbeat_interval = heartbeat_info_dict.get('interval', 30)
  30
  31         request = Request(heartbeat_url, heartbeat_data)
  32
  33         def heartbeat():
  34             try:
  35                 self.ydl.urlopen(request).read()
  36             except Exception:
  37                 self.to_screen('[%s] Heartbeat failed' % self.FD_NAME)
  38
  39             with heartbeat_lock:
  40                 if not download_complete:
  41                     timer[0] = threading.Timer(heartbeat_interval, heartbeat)
  42                     timer[0].start()
  43
  44         heartbeat_info_dict['ping']()
  45         self.to_screen('[%s] Heartbeat with %d second interval ...' % (self.FD_NAME, heartbeat_interval))
  46         try:
  47             heartbeat()
  48             if type(fd).__name__ == 'HlsFD':
  49                 info_dict.update(ie._extract_m3u8_formats(info_dict['url'], info_dict['id'])[0])
  50             success = fd.real_download(filename, info_dict)
  51         finally:
  52             if heartbeat_lock:
  53                 with heartbeat_lock:
  54                     timer[0].cancel()
  55                     download_complete = True
  56         return success
  57
  58
  59 class NiconicoLiveFD(FileDownloader):
  60     """ Downloads niconico live without being stopped """
  61
  62     def real_download(self, filename, info_dict):
  63         video_id = info_dict['video_id']
  64         ws_url = info_dict['url']
  65         ws_extractor = info_dict['ws']
  66         ws_origin_host = info_dict['origin']
  67         cookies = info_dict.get('cookies')
  68         live_quality = info_dict.get('live_quality', 'high')
  69         live_latency = info_dict.get('live_latency', 'high')
  70         dl = FFmpegFD(self.ydl, self.params or {})
  71
  72         new_info_dict = info_dict.copy()
  73         new_info_dict.update({
  74             'protocol': 'm3u8',
  75         })
  76
  77         def communicate_ws(reconnect):
  78             if reconnect:
  79                 ws = WebSocketsWrapper(ws_url, {
  80                     'Cookies': str_or_none(cookies) or '',
  81                     'Origin': f'https://{ws_origin_host}',
  82                     'Accept': '*/*',
  83                     'User-Agent': self.params['http_headers']['User-Agent'],
  84                 })
  85                 if self.ydl.params.get('verbose', False):
  86                     self.to_screen('[debug] Sending startWatching request')
  87                 ws.send(json.dumps({
  88                     'type': 'startWatching',
  89                     'data': {
  90                         'stream': {
  91                             'quality': live_quality,
  92                             'protocol': 'hls+fmp4',
  93                             'latency': live_latency,
  94                             'chasePlay': False
  95                         },
  96                         'room': {
  97                             'protocol': 'webSocket',
  98                             'commentable': True
  99                         },
 100                         'reconnect': True,
 101                     }
 102                 }))
 103             else:
 104                 ws = ws_extractor
 105             with ws:
 106                 while True:
 107                     recv = ws.recv()
 108                     if not recv:
 109                         continue
 110                     data = json.loads(recv)
 111                     if not data or not isinstance(data, dict):
 112                         continue
 113                     if data.get('type') == 'ping':
 114                         # pong back
 115                         ws.send(r'{"type":"pong"}')
 116                         ws.send(r'{"type":"keepSeat"}')
 117                     elif data.get('type') == 'disconnect':
 118                         self.write_debug(data)
 119                         return True
 120                     elif data.get('type') == 'error':
 121                         self.write_debug(data)
 122                         message = try_get(data, lambda x: x['body']['code'], str) or recv
 123                         return DownloadError(message)
 124                     elif self.ydl.params.get('verbose', False):
 125                         if len(recv) > 100:
 126                             recv = recv[:100] + '...'
 127                         self.to_screen('[debug] Server said: %s' % recv)
 128
 129         def ws_main():
 130             reconnect = False
 131             while True:
 132                 try:
 133                     ret = communicate_ws(reconnect)
 134                     if ret is True:
 135                         return
 136                 except BaseException as e:
 137                     self.to_screen('[%s] %s: Connection error occured, reconnecting after 10 seconds: %s' % ('niconico:live', video_id, str_or_none(e)))
 138                     time.sleep(10)
 139                     continue
 140                 finally:
 141                     reconnect = True
 142
 143         thread = threading.Thread(target=ws_main, daemon=True)
 144         thread.start()
 145
 146         return dl.download(filename, new_info_dict)