Refactor: unify YDL object and proxy cfg field
This would allow to add sites much simplier or even drop the ydl_fn_keys. Main purpose of the refactoring is a code cleanup.
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5 changed files with 68 additions and 113 deletions
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@ -20,11 +20,8 @@ class Config:
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os.getenv('TRACK_FILE_TMPL') or '%(track)S.%(ext)s',
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)
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# Proxy URL for yt_proxied downloader (can be used for geo-restricted content)
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self.yt_proxy = os.getenv('YT_PROXY') or None
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# Proxy for soundcloud
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self.sc_proxy = os.getenv('SC_PROXY') or None
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# `or None` -- defaults to None also if PROXY is an empty string
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self.proxy = os.getenv('PROXY') or None
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self.save_lyrics = _parse_bool(os.getenv('SAVE_LYRICS'), True)
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self.save_cover = _parse_bool(os.getenv('SAVE_COVER'), True)
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@ -10,19 +10,24 @@ import genius
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ENC_UTF8 = 3
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class InfoYouTubePP(PostProcessor):
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'''Generates YT Music fields in info if necessary.
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class InfoGenPP(PostProcessor):
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'''Generates track, artist(s), album, track_number fields
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from other info fields if they are not present in current info dict.
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Must be run before downloading and post-processing with
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FFmpegExtractAudioPP and ID3YouTubePP, so use only with
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when<="before_dl" ("pre_process" also suits, see yt_dlp.utils.POSTPROCESS_WHEN)
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for correct file path and ID3 tags'''
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FFmpegExtractAudioPP and ID3TagsPP, so use only with
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when="pre_process" for correct file path and ID3 tags'''
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def run(self, information):
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if not 'track' in information:
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information['track'] = information['title']
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if not 'artist' in information:
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information['artist'] = information['uploader'].removesuffix(' - Topic')
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artist = information['uploader'].removesuffix(' - Topic')
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# <Really-dumb-fix>
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if artist == 'LINKIN PARK':
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artist = 'Linkin Park'
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# </Really-dumb-fix>
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information['artist'] = artist
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if not 'artists' in information:
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information['artists'] = [information['artist']]
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@ -44,8 +49,8 @@ class InfoYouTubePP(PostProcessor):
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class ID3TagsPP(PostProcessor):
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'''Inserts ID3 tags after all PPs (for YT: InfoYouTubePP and FFmpegExtractAudioPP),
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triggers searching and parsing lyrics from Genius'''
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'''Inserts ID3 tags including lyrics (see parser in backend/genius.py).
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Must be run after all PPs ()'''
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def __init__(self) -> None:
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self.cfg = config.get()
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@ -30,21 +30,19 @@ async def handler(socket: SocketT) -> None:
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try:
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data = json.loads(message)
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print(data)
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match data['action']:
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case 'list': # list tracks in album
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ydls.choose_ydl(data['site'])
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ydls.update_params(data['site'], data.get('proxy', False))
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await socket.send(response.playlist(
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await ydls.get_playlist_items(data['url']),
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))
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case 'download': # download by URL
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ydls.choose_ydl(data['site'])
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ret = await ydls.download(
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data['url'],
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data.get('items'),
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)
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ydls.update_params(data['site'], data.get('proxy', False), data.get('items'))
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ret = await ydls.download(data['url'])
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await socket.send(response.ydl_end(ret))
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case _:
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@ -57,6 +55,8 @@ async def handler(socket: SocketT) -> None:
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if not socket.closed:
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await socket.send(response.error(ex))
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ydls.reset_params()
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ydls.cleanup()
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@ -15,7 +15,7 @@ TEST_MP3 = 'music/test.mp3'
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INFO_BEFORE = {
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"filepath": TEST_MP3,
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"title": "A Line in the Sand",
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"channel": "Linkin Park - Topic",
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"uploader": "Linkin Park - Topic",
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"playlist": "Album \u2013 The Hunting Party",
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"playlist_index": 12,
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"release_year": 2015,
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@ -44,7 +44,7 @@ class TestPostProcessorsOnFakeData(TestCase):
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def test_infoytpp(self) -> None:
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_, info = id3pp.InfoYouTubePP().run(INFO_BEFORE)
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_, info = id3pp.InfoGenPP().run(INFO_BEFORE)
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self.assertDictEqual(info, INFO_AFTER)
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def test_id3(self) -> None:
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@ -10,46 +10,7 @@ import response
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import id3pp
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class _CreateYDL:
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@staticmethod
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def youtube() -> YoutubeDL:
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ydl = YoutubeDL({'format': 'ba'})
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ydl.add_post_processor(id3pp.InfoYouTubePP(), when='before_dl')
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ydl.add_post_processor(FFmpegExtractAudioPP(preferredcodec='mp3'), when='post_process')
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return ydl
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@staticmethod
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def yt_proxied() -> YoutubeDL:
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ydl = _CreateYDL.youtube()
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proxy = config.get().yt_proxy
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if proxy is not None:
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ydl.params['proxy'] = proxy
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return ydl
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@staticmethod
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def soundcloud() -> YoutubeDL:
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ydl = YoutubeDL({'format': 'ba[ext=mp3]/ba'})
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ydl.add_post_processor(id3pp.InfoYouTubePP(), when='pre_process')
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proxy = config.get().sc_proxy
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if proxy is not None:
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ydl.params['proxy'] = proxy
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ydl.add_post_processor(FFmpegExtractAudioPP(preferredcodec='mp3'), when='post_process')
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return ydl
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@staticmethod
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def yandex() -> YoutubeDL:
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return YoutubeDL()
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create_ydl_fn = {
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'youtube': _CreateYDL.youtube,
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'yt_proxied': _CreateYDL.yt_proxied,
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'soundcloud': _CreateYDL.soundcloud,
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'yandex': _CreateYDL.yandex,
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}
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ydl_fn_keys = create_ydl_fn.keys()
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ydl_fn_keys = {'youtube', 'yandex', 'soundcloud'}
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# need process=True for track title in extract_info output
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NP_YDLS = {'yandex', 'soundcloud'}
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@ -83,98 +44,90 @@ class Downloader:
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def __init__(self, logger: YdlLogger | None = None) -> None:
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self.ydls: dict[str, YoutubeDL | None] = {
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key: None
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for key in ydl_fn_keys
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}
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self.cfg = config.get()
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self.cur_ydl: YoutubeDL | None = None
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self.cur_site = ''
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self.ydl = YoutubeDL({'format': 'ba[ext=mp3]/ba/b'})
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self.ydl.add_post_processor(id3pp.InfoGenPP(), when='pre_process')
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# Note: it skips converting if downloaded file is already MP3
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self.ydl.add_post_processor(FFmpegExtractAudioPP(preferredcodec='mp3'), when='post_process')
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# ID3 tags are set after all pre/post-processings
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self.ydl.add_post_processor(id3pp.ID3TagsPP(), when='post_process')
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self.id3pp_obj = id3pp.ID3TagsPP()
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if logger is not None:
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self.ydl.params['logger'] = logger
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self.logger = logger
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self.ydl.params['outtmpl']['default'] = self.cfg.tmpl
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def choose_ydl(self, site: str) -> None:
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self.need_process = False
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self.updated_params = []
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ydl = self.ydls[site]
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cfg = config.get()
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def update_params(
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self,
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site: str,
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proxy: bool = False,
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items: Iterable[int] | None = None) -> None:
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if ydl is None:
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ydl = create_ydl_fn[site]()
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self.need_process = site in NP_YDLS
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if self.logger is not None:
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ydl.params['logger'] = self.logger
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cookies = self.cfg.cookies_dir / (site + '.txt')
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if cookies.exists():
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self.ydl.params['cookiefile'] = str(cookies)
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self.updated_params.append('cookiefile')
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ydl.params['outtmpl']['default'] = cfg.tmpl
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ydl.add_post_processor(self.id3pp_obj, when='post_process')
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if proxy and self.cfg.proxy is not None:
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self.ydl.params['proxy'] = self.cfg.proxy
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self.updated_params.append('proxy')
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cookies = cfg.cookies_dir / (site + '.txt')
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if cookies.exists():
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ydl.params['cookiefile'] = str(cookies)
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if items:
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self.ydl.params['playlist_items'] = (
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','.join(str(i) for i in items)
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)
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self.updated_params.append('playlist_items')
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self.cur_ydl = ydl
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self.cur_site = site
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def reset_params(self) -> None:
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def get_cur_ydl(self) -> YoutubeDL:
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ydl = self.cur_ydl
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if ydl is None:
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raise RuntimeError('ydl object not initialized')
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return ydl
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for param in self.updated_params:
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del self.ydl.params[param]
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self.updated_params.clear()
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self.need_process = False
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async def get_playlist_items(self, url: str) -> list[str]:
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return await asyncio.get_event_loop().run_in_executor(
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None,
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Downloader._target_get_playlist_items,
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self.get_cur_ydl(),
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self.ydl,
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url,
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self.cur_site in NP_YDLS,
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self.need_process,
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)
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@staticmethod
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def _target_get_playlist_items(ydl: YoutubeDL, url: str, process: bool) -> list[str]:
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info = ydl.extract_info(url, download=False, process=process)
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if info is None:
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raise RuntimeError('ydl.extract_info returned None')
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return [
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entry['track'] if 'track' in entry else entry['title']
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for entry in info['entries']
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]
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async def download(
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self,
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url: str,
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playlist_items: Iterable[int] | None = None) -> int:
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async def download(self, url: str) -> int:
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return await asyncio.get_event_loop().run_in_executor(
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None,
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Downloader._target_download,
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self.get_cur_ydl(),
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self.ydl,
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url,
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playlist_items,
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)
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@staticmethod
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def _target_download(
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ydl: YoutubeDL,
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url: str,
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playlist_items: Iterable[int] | None = None) -> int:
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def _target_download(ydl: YoutubeDL, url: str) -> int:
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if playlist_items:
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ydl.params['playlist_items'] = ','.join(str(i) for i in playlist_items)
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ret = ydl.download(url)
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if playlist_items:
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del ydl.params['playlist_items']
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return ret
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return ydl.download(url)
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def cleanup(self) -> None:
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for ydl in self.ydls.values():
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if ydl is not None:
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ydl.close()
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self.ydl.close()
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