237 lines
11 KiB
Python
237 lines
11 KiB
Python
from __future__ import division, unicode_literals
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import json
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import time
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from .fragment import FragmentFD
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from ..compat import compat_urllib_error
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from ..utils import (
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try_get,
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dict_get,
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int_or_none,
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RegexNotFoundError,
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)
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from ..extractor.youtube import YoutubeBaseInfoExtractor as YT_BaseIE
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class YoutubeLiveChatFD(FragmentFD):
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""" Downloads YouTube live chats fragment by fragment """
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FD_NAME = 'youtube_live_chat'
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def real_download(self, filename, info_dict):
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video_id = info_dict['video_id']
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self.to_screen('[%s] Downloading live chat' % self.FD_NAME)
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fragment_retries = self.params.get('fragment_retries', 0)
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test = self.params.get('test', False)
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ctx = {
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'filename': filename,
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'live': True,
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'total_frags': None,
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}
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ie = YT_BaseIE(self.ydl)
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start_time = int(time.time() * 1000)
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def dl_fragment(url, data=None, headers=None):
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http_headers = info_dict.get('http_headers', {})
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if headers:
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http_headers = http_headers.copy()
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http_headers.update(headers)
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return self._download_fragment(ctx, url, info_dict, http_headers, data)
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def parse_actions_replay(live_chat_continuation):
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offset = continuation_id = click_tracking_params = None
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processed_fragment = bytearray()
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for action in live_chat_continuation.get('actions', []):
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if 'replayChatItemAction' in action:
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replay_chat_item_action = action['replayChatItemAction']
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offset = int(replay_chat_item_action['videoOffsetTimeMsec'])
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processed_fragment.extend(
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json.dumps(action, ensure_ascii=False).encode('utf-8') + b'\n')
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if offset is not None:
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continuation = try_get(
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live_chat_continuation,
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lambda x: x['continuations'][0]['liveChatReplayContinuationData'], dict)
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if continuation:
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continuation_id = continuation.get('continuation')
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click_tracking_params = continuation.get('clickTrackingParams')
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self._append_fragment(ctx, processed_fragment)
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return continuation_id, offset, click_tracking_params
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def try_refresh_replay_beginning(live_chat_continuation):
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# choose the second option that contains the unfiltered live chat replay
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refresh_continuation = try_get(
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live_chat_continuation,
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lambda x: x['header']['liveChatHeaderRenderer']['viewSelector']['sortFilterSubMenuRenderer']['subMenuItems'][1]['continuation']['reloadContinuationData'], dict)
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if refresh_continuation:
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# no data yet but required to call _append_fragment
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self._append_fragment(ctx, b'')
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refresh_continuation_id = refresh_continuation.get('continuation')
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offset = 0
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click_tracking_params = refresh_continuation.get('trackingParams')
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return refresh_continuation_id, offset, click_tracking_params
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return parse_actions_replay(live_chat_continuation)
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live_offset = 0
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def parse_actions_live(live_chat_continuation):
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nonlocal live_offset
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continuation_id = click_tracking_params = None
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processed_fragment = bytearray()
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for action in live_chat_continuation.get('actions', []):
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timestamp = self.parse_live_timestamp(action)
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if timestamp is not None:
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live_offset = timestamp - start_time
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# compatibility with replay format
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pseudo_action = {
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'replayChatItemAction': {'actions': [action]},
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'videoOffsetTimeMsec': str(live_offset),
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'isLive': True,
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}
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processed_fragment.extend(
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json.dumps(pseudo_action, ensure_ascii=False).encode('utf-8') + b'\n')
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continuation_data_getters = [
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lambda x: x['continuations'][0]['invalidationContinuationData'],
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lambda x: x['continuations'][0]['timedContinuationData'],
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]
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continuation_data = try_get(live_chat_continuation, continuation_data_getters, dict)
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if continuation_data:
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continuation_id = continuation_data.get('continuation')
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click_tracking_params = continuation_data.get('clickTrackingParams')
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timeout_ms = int_or_none(continuation_data.get('timeoutMs'))
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if timeout_ms is not None:
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time.sleep(timeout_ms / 1000)
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self._append_fragment(ctx, processed_fragment)
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return continuation_id, live_offset, click_tracking_params
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def download_and_parse_fragment(url, frag_index, request_data=None, headers=None):
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count = 0
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while count <= fragment_retries:
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try:
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success, raw_fragment = dl_fragment(url, request_data, headers)
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if not success:
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return False, None, None, None
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try:
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data = ie.extract_yt_initial_data(video_id, raw_fragment.decode('utf-8', 'replace'))
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except RegexNotFoundError:
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data = None
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if not data:
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data = json.loads(raw_fragment)
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live_chat_continuation = try_get(
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data,
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lambda x: x['continuationContents']['liveChatContinuation'], dict) or {}
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if info_dict['protocol'] == 'youtube_live_chat_replay':
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if frag_index == 1:
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continuation_id, offset, click_tracking_params = try_refresh_replay_beginning(live_chat_continuation)
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else:
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continuation_id, offset, click_tracking_params = parse_actions_replay(live_chat_continuation)
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elif info_dict['protocol'] == 'youtube_live_chat':
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continuation_id, offset, click_tracking_params = parse_actions_live(live_chat_continuation)
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return True, continuation_id, offset, click_tracking_params
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except compat_urllib_error.HTTPError as err:
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count += 1
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if count <= fragment_retries:
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self.report_retry_fragment(err, frag_index, count, fragment_retries)
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if count > fragment_retries:
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self.report_error('giving up after %s fragment retries' % fragment_retries)
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return False, None, None, None
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self._prepare_and_start_frag_download(ctx, info_dict)
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success, raw_fragment = dl_fragment(info_dict['url'])
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if not success:
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return False
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try:
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data = ie.extract_yt_initial_data(video_id, raw_fragment.decode('utf-8', 'replace'))
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except RegexNotFoundError:
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return False
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continuation_id = try_get(
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data,
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lambda x: x['contents']['twoColumnWatchNextResults']['conversationBar']['liveChatRenderer']['continuations'][0]['reloadContinuationData']['continuation'])
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# no data yet but required to call _append_fragment
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self._append_fragment(ctx, b'')
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ytcfg = ie.extract_ytcfg(video_id, raw_fragment.decode('utf-8', 'replace'))
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if not ytcfg:
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return False
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api_key = try_get(ytcfg, lambda x: x['INNERTUBE_API_KEY'])
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innertube_context = try_get(ytcfg, lambda x: x['INNERTUBE_CONTEXT'])
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if not api_key or not innertube_context:
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return False
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visitor_data = try_get(innertube_context, lambda x: x['client']['visitorData'], str)
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if info_dict['protocol'] == 'youtube_live_chat_replay':
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url = 'https://www.youtube.com/youtubei/v1/live_chat/get_live_chat_replay?key=' + api_key
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chat_page_url = 'https://www.youtube.com/live_chat_replay?continuation=' + continuation_id
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elif info_dict['protocol'] == 'youtube_live_chat':
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url = 'https://www.youtube.com/youtubei/v1/live_chat/get_live_chat?key=' + api_key
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chat_page_url = 'https://www.youtube.com/live_chat?continuation=' + continuation_id
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frag_index = offset = 0
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click_tracking_params = None
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while continuation_id is not None:
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frag_index += 1
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request_data = {
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'context': innertube_context,
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'continuation': continuation_id,
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}
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if frag_index > 1:
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request_data['currentPlayerState'] = {'playerOffsetMs': str(max(offset - 5000, 0))}
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if click_tracking_params:
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request_data['context']['clickTracking'] = {'clickTrackingParams': click_tracking_params}
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headers = ie.generate_api_headers(ytcfg, visitor_data=visitor_data)
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headers.update({'content-type': 'application/json'})
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fragment_request_data = json.dumps(request_data, ensure_ascii=False).encode('utf-8') + b'\n'
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success, continuation_id, offset, click_tracking_params = download_and_parse_fragment(
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url, frag_index, fragment_request_data, headers)
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else:
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success, continuation_id, offset, click_tracking_params = download_and_parse_fragment(
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chat_page_url, frag_index)
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if not success:
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return False
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if test:
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break
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self._finish_frag_download(ctx, info_dict)
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return True
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@staticmethod
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def parse_live_timestamp(action):
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action_content = dict_get(
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action,
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['addChatItemAction', 'addLiveChatTickerItemAction', 'addBannerToLiveChatCommand'])
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if not isinstance(action_content, dict):
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return None
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item = dict_get(action_content, ['item', 'bannerRenderer'])
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if not isinstance(item, dict):
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return None
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renderer = dict_get(item, [
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# text
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'liveChatTextMessageRenderer', 'liveChatPaidMessageRenderer',
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'liveChatMembershipItemRenderer', 'liveChatPaidStickerRenderer',
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# ticker
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'liveChatTickerPaidMessageItemRenderer',
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'liveChatTickerSponsorItemRenderer',
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# banner
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'liveChatBannerRenderer',
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])
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if not isinstance(renderer, dict):
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return None
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parent_item_getters = [
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lambda x: x['showItemEndpoint']['showLiveChatItemEndpoint']['renderer'],
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lambda x: x['contents'],
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]
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parent_item = try_get(renderer, parent_item_getters, dict)
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if parent_item:
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renderer = dict_get(parent_item, [
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'liveChatTextMessageRenderer', 'liveChatPaidMessageRenderer',
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'liveChatMembershipItemRenderer', 'liveChatPaidStickerRenderer',
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])
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if not isinstance(renderer, dict):
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return None
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return int_or_none(renderer.get('timestampUsec'), 1000)
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