Config, cookies

(there was an attempt to redirect yt-dlp stdout)

.gitignore

@@ -3,3 +3,4 @@ __pycache__/
 .ruff_cache/
 
 music/
+cookies/

Makefile

@@ -1,7 +1,7 @@
 .PHONY: run test build frontend backend
 
 run:
-	@echo 'Not implemented'
+	HOST=127.0.0.1 PORT=4009 COOKIES_DIR=cookies python3 ./backend/main.py
 
 test:
 	@python3 -m unittest discover -vcs ./backend

backend/config.py

@@ -0,0 +1,22 @@
+import os
+from pathlib import Path
+
+
+class Config:
+
+    def __init__(self) -> None:
+
+        self.host = os.getenv('HOST') or '0.0.0.0'
+        self.port = int(os.getenv('PORT') or 4009)
+        self.path_length = int(os.getenv('PATH_LENGTH') or 255)
+        self.cookies_dir = Path(os.getenv('COOKIES_DIR') or 'cookies')
+
+
+_config: Config | None = None
+
+
+def get() -> Config:
+    global _config
+    if _config is None:
+        _config = Config()
+    return _config

backend/main.py

@@ -1,27 +1,19 @@
 import asyncio
 import json
 
-import secrets
-import time
-
 import websockets
 
+import config
 import response
 import ydl_pool
 import ydl_wrap
 
 
-# TODO: config
-HOST = '127.0.0.1'
-PORT = 5678
+type SocketT = websockets.WebSocketServerProtocol
 
 
-def generate_key() -> str:
 
-    return hex(time.time_ns()) + secrets.token_hex(2)
-
-
-async def handler(socket: websockets.WebSocketServerProtocol) -> None:
+async def handler(socket: SocketT) -> None:
 
     ydls = ydl_pool.Downloaders()
 
@@ -41,14 +33,12 @@ async def handler(socket: websockets.WebSocketServerProtocol) -> None:
                     ))
 
                 case 'download':  # download by URL
-                    # TODO: send all yt-dlp's output to client
-                    await socket.send(response.ok_download(
-                        await ydl_wrap.download(
-                            ydls.get_ydl(data['site']),
-                            data['url'],
-                            data.get('items'),
-                        )
-                    ))
+                    ret = await ydl_wrap.download(
+                        ydls.get_ydl(data['site']),
+                        data['url'],
+                        data.get('items'),
+                    )
+                    await socket.send(response.ok_downloaded(ret))
 
                 # TODO: cancellation
 
@@ -66,9 +56,10 @@ async def handler(socket: websockets.WebSocketServerProtocol) -> None:
 
 
 async def main() -> None:
-    async with websockets.serve(handler, HOST, PORT):
+    cfg = config.get()
+    async with websockets.serve(handler, cfg.host, cfg.port):
         await asyncio.Future()
 
 
 if __name__ == '__main__':
-    asyncio.run(main())
+    asyncio.run(main(), debug=True)

backend/response.py

@@ -9,9 +9,9 @@ def ok_playlist(items: list[str]) -> str:
         "data": items,
     })
 
-def ok_download(ret: int) -> str:
+def ok_downloaded(ret: int) -> str:
     return json.dumps({
-        "ok": True,
+        "type": "downloaded",
         "data": ret,
     })
 

backend/ydl_pool.py

@@ -1,6 +1,7 @@
 from yt_dlp import YoutubeDL
 from yt_dlp.postprocessor import FFmpegExtractAudioPP
 
+import config
 import id3pp
 
 
@@ -21,7 +22,7 @@ class _CreateYDL:
 
     @staticmethod
     def yandex() -> YoutubeDL:
-        return YoutubeDL()  # TODO: cookies
+        return YoutubeDL()
 
 
 create_ydl_fn = {
@@ -45,13 +46,21 @@ class Downloaders:
 
     def get_ydl(self, site: str) -> YoutubeDL:
 
+        cfg = config.get()
         ydl = self.ydls[site]
+
         if ydl is None:
             ydl = create_ydl_fn[site]()
-            ydl.params['trim_file_name'] = 40  # TODO: config
+
+            ydl.params['trim_file_name'] = cfg.path_length  # NOTE: includes path, not only filename
             # artists.0 instead of artist, because it can contain "feat. ..."
             ydl.params['outtmpl']['default'] = 'music/%(artists.0)s/%(album)s/%(track)s.%(ext)s'
             ydl.add_post_processor(id3pp.ID3TagsPP(), when='post_process')
+
+            cookies = cfg.cookies_dir / (site + '.txt')
+            if cookies.exists():
+                ydl.params['cookiefile'] = str(cookies)
+
         return ydl
 
     def cleanup(self) -> None:

backend/ydl_wrap.py

@@ -6,23 +6,43 @@ from yt_dlp import YoutubeDL
 
 async def get_playlist_items(ydl: YoutubeDL, url: str) -> list[str]:
 
-    return await asyncio.get_event_loop().run_in_executor(None, _target_get_playlist_items, ydl, url)
+    return await asyncio.get_event_loop().run_in_executor(
+        None,
+        _target_get_playlist_items,
+        ydl,
+        url,
+    )
 
 
 def _target_get_playlist_items(ydl: YoutubeDL, url: str) -> list[str]:
 
-    info = ydl.extract_info(url, download=False, process=False)
+    info = ydl.extract_info(url, download=False, process=True)
     if info is None:
         raise RuntimeError('ydl.extract_info returned None')
-    return [entry['title'] for entry in info['entries']]
+    return [
+        entry['track'] if 'track' in entry else entry['title']
+        for entry in info['entries']
+    ]
 
 
-async def download(ydl: YoutubeDL, url: str, playlist_items: Iterable[int] | None = None) -> int:
+async def download(
+        ydl: YoutubeDL,
+        url: str,
+        playlist_items: Iterable[int] | None = None) -> int:
 
-    return await asyncio.get_event_loop().run_in_executor(None, _target_download, ydl, url, playlist_items)
+    return await asyncio.get_event_loop().run_in_executor(
+        None,
+        _target_download,
+        ydl,
+        url,
+        playlist_items,
+    )
 
 
-def _target_download(ydl: YoutubeDL, url: str, playlist_items: Iterable[int] | None = None) -> int:
+def _target_download(
+        ydl: YoutubeDL,
+        url: str,
+        playlist_items: Iterable[int] | None = None) -> int:
 
     if playlist_items:
         ydl.params['playlist_items'] = ','.join(str(i) for i in playlist_items)