Working WS server, yt-dlp objects "pool", async wrappers
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53a00570e7
commit
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4 changed files with 150 additions and 39 deletions
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@ -7,49 +7,62 @@ import time
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import websockets
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import response
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import ydl_pool
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import ydl_wrap
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# TODO: config
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HOST = '127.0.0.1'
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PORT = 5678
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# TODO: make dict with functions creating YoutubeDL for each site instead of this set
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SITES = {'youtube', 'yandex'}
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sessions = {}
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def generate_key() -> str:
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return hex(time.time_ns()) + secrets.token_hex(2)
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async def handler(socket: websockets.WebSocketServerProtocol) -> None:
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ydls = ydl_pool.Downloaders()
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async for message in socket:
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data = json.loads(await socket.recv())
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if 'action' not in data:
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await socket.send(response.error_field('action'))
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return
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match data['action']:
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case 'init': # create session
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if data.get('site') not in SITES:
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await socket.send(response.error_field('site'))
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return
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key = generate_key()
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sessions[key] = "" # TODO
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await socket.send(response.ok_init(key))
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case 'list': # list tracks in album
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if 'url' not in data:
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await socket.send(response.error_field('url'))
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return
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await socket.send(response.ok_playlist(['title 1', 'title 2'])) # TODO
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case 'download': # download by URL
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if 'url' not in data:
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await socket.send(response.error_field('url'))
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return
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# TODO: start thread and send all yt-dlp's output to client
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await socket.send(response.OK)
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case _:
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await socket.send(response.error_field('action'))
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try:
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data = json.loads(message)
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match data['action']:
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case 'list': # list tracks in album
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await socket.send(response.ok_playlist(
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await ydl_wrap.get_playlist_items(
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ydls.get_ydl(data['site']),
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data['url'],
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)
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))
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case 'download': # download by URL
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# TODO: send all yt-dlp's output to client
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await socket.send(response.ok_download(
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await ydl_wrap.download(
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ydls.get_ydl(data['site']),
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data['url'],
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data.get('items'),
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)
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))
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# TODO: cancellation
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case _:
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raise ValueError('invalid "action" field value')
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except websockets.ConnectionClosed:
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break
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except Exception as ex:
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if not socket.closed:
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await socket.send(response.error(ex))
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ydls.cleanup()
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async def main() -> None:
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@ -1,22 +1,26 @@
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import json
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import traceback
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OK = '{"ok":true}'
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def ok_init(key: str) -> str:
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return json.dumps({
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"ok": True,
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"data": key,
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})
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def ok_playlist(items: list[str]) -> str:
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return json.dumps({
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"ok": True,
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"data": items,
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})
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def error_field(field: str) -> str:
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def ok_download(ret: int) -> str:
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return json.dumps({
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"ok": True,
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"data": ret,
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})
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def error(ex: Exception) -> str:
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traceback.print_tb(ex.__traceback__)
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return json.dumps({
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"ok": False,
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"error": "field",
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"data": field,
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"error": {
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"type": ex.__class__.__qualname__,
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"message": str(ex),
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}
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})
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61
backend/ydl_pool.py
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61
backend/ydl_pool.py
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@ -0,0 +1,61 @@
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from yt_dlp import YoutubeDL
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from yt_dlp.postprocessor import FFmpegExtractAudioPP
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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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ydl.params['proxy'] = 'http://127.0.0.1:1080' # TODO
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return ydl
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@staticmethod
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def yandex() -> YoutubeDL:
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return YoutubeDL() # TODO: cookies
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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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'yandex': _CreateYDL.yandex,
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}
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ydl_fn_keys = create_ydl_fn.keys()
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class Downloaders:
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def __init__(self) -> None:
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self.ydls: dict[str, YoutubeDL | None] = {
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'youtube': None,
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'yt_proxied': None,
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'yandex': None,
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}
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def get_ydl(self, site: str) -> YoutubeDL:
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ydl = self.ydls[site]
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if ydl is None:
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ydl = create_ydl_fn[site]()
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ydl.params['trim_file_name'] = 40 # TODO: config
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# artists.0 instead of artist, because it can contain "feat. ..."
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ydl.params['outtmpl']['default'] = 'music/%(artists.0)s/%(album)s/%(track)s.%(ext)s'
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ydl.add_post_processor(id3pp.ID3TagsPP(), when='post_process')
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return ydl
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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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33
backend/ydl_wrap.py
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33
backend/ydl_wrap.py
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@ -0,0 +1,33 @@
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import asyncio
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from typing import Iterable
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from yt_dlp import YoutubeDL
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async def get_playlist_items(ydl: YoutubeDL, url: str) -> list[str]:
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return await asyncio.get_event_loop().run_in_executor(None, _target_get_playlist_items, ydl, url)
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def _target_get_playlist_items(ydl: YoutubeDL, url: str) -> list[str]:
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info = ydl.extract_info(url, download=False, process=False)
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if info is None:
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raise RuntimeError('ydl.extract_info returned None')
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return [entry['title'] for entry in info['entries']]
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async def download(ydl: YoutubeDL, url: str, playlist_items: Iterable[int] | None = None) -> int:
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return await asyncio.get_event_loop().run_in_executor(None, _target_download, ydl, url, playlist_items)
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def _target_download(ydl: YoutubeDL, url: str, playlist_items: Iterable[int] | None = None) -> 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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del ydl.params['playlist_items']
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return ret
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