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cash
303
backend/web/app.py
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303
backend/web/app.py
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"""app.py – Jul 15 2025"""
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from __future__ import annotations
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import asyncio
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import mimetypes
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import os
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import secrets
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import shutil
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import signal
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import sysconfig
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import threading
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from pathlib import Path
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from typing import Dict
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import aiofiles
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import structlog
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from quart import (
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Quart,
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Response,
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jsonify,
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redirect,
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render_template,
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request,
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session,
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url_for, render_template_string,
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)
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from backend.core.logging import init_logging
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from core.settings import TMP_DIR, DOWNLOAD_DIR
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from core.formats import choose_format, _lookup_cache_sync, _cached_metadata_fetch
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from core.download import download, EST_MB
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from core.formats import choose_format as choose_format_logic
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from core.db_xp import is_ip_banned, ensure_user, get_status
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from core.web.db_extra import invalid_over_limit, init_proxy_seed, start_background_tasks
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from core.db import metadata, engine
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from core import progress_bus
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init_logging()
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log = structlog.get_logger()
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def _frontend_root() -> Path:
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here = Path(__file__).resolve().parent
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dev = here.parent.parent / "frontend"
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return dev if dev.exists() else Path(sysconfig.get_path("data")) / "share" / "s1ne" / "frontend"
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FRONTEND_ROOT = _frontend_root()
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app = Quart(
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__name__,
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template_folder=str(FRONTEND_ROOT / "templates"),
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static_folder=str(FRONTEND_ROOT / "static"),
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)
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app.secret_key = os.getenv("SECRET_KEY_WORD")
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_tasks: Dict[str, asyncio.Task] = {}
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async def _cleanup_temp(interval: int = 900) -> None:
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while True:
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cutoff = asyncio.get_event_loop().time() - 60 * 60 * 12
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for p in (TMP_DIR / "ytlocks").glob("*.lock"):
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if p.stat().st_mtime < cutoff:
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p.unlink(missing_ok=True)
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for pattern in ("yt_*", "tmp*"):
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for p in TMP_DIR.glob(pattern):
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if p.is_dir() and p.stat().st_mtime < cutoff:
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shutil.rmtree(p, ignore_errors=True)
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await asyncio.sleep(interval)
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async def _file_iter(path: Path, chunk: int = 1 << 15):
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async with aiofiles.open(path, "rb") as f:
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while (blk := await f.read(chunk)):
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yield blk
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async def _shutdown_waiter():
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await asyncio.sleep(0.1)
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log.info("shutdown.tasks_cancelled")
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def _graceful_exit() -> None:
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log.info("shutdown.initiated")
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for t in list(_tasks.values()):
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if not t.done():
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t.cancel()
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asyncio.create_task(_shutdown_waiter())
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def force_exit():
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import time
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time.sleep(5)
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os._exit(1)
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threading.Thread(target=force_exit, daemon=True).start()
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@app.before_serving
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async def _launch_tasks() -> None:
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metadata.create_all(engine)
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await init_proxy_seed()
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start_background_tasks(asyncio.get_running_loop())
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asyncio.create_task(_cleanup_temp())
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loop = asyncio.get_running_loop()
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for sig in (signal.SIGTERM, signal.SIGINT):
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loop.add_signal_handler(sig, _graceful_exit)
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@app.route("/")
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async def home():
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if not request.cookies.get("auth"):
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return await render_template("login.html")
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ip = request.remote_addr or "0.0.0.0"
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ensure_user(ip)
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soft_banned = get_status(ip)["soft_banned"]
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return await render_template("index.html", soft_banned=soft_banned)
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@app.route("/login", methods=["GET", "POST"])
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async def login():
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if request.method == "GET":
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return await render_template("login.html")
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form = await request.form
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if form.get("password") == os.getenv("MASTER_PASSWORD"):
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resp = redirect(url_for("home"))
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resp.set_cookie("auth", "1", httponly=True, secure=False)
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return resp
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return await render_template("login.html", error_badge="Incorrect password")
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@app.route("/logout")
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async def logout():
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session.clear()
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resp = redirect(url_for("login"))
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resp.delete_cookie("auth")
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return resp
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@app.route("/choose_format", methods=["POST"])
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async def handle_choose_format() -> Response:
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url: str
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try:
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if request.content_type and "application/json" in request.content_type:
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data = await request.get_json(silent=True) or {}
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url = (data.get("url") or "").strip()
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else:
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form = await request.form
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url = (form.get("url") or "").strip()
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if not url:
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#log.warning("choose_format.missing_url")
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return jsonify({"error": "url field required"}), 422
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run_id: str = session.get("run_id") or secrets.token_urlsafe(10)
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session["run_id"] = run_id
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#log.info("choose_format.run_id_set", run_id=run_id, url=url)
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res: dict = await choose_format_logic(url)
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res["sid"] = run_id
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if "error" in res:
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#log.warning("choose_format.logic_error", error=res["error"], url=url)
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return jsonify(res), 400
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log.info("choose_format.success", url=url, title=res.get("title"), platform=res.get("platform"))
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return jsonify(res)
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except Exception as e:
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log.exception("choose_format.exception", err=str(e))
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return jsonify({"error": "Internal error during format selection"}), 500
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@app.route("/download_file")
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async def dl():
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ip = request.remote_addr or "0.0.0.0"
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if ip == "127.0.0.1":
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log.info("dev_mode.skip_ban_check", ip=ip)
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else:
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if is_ip_banned(ip):
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log.warning("download.reject.banned", ip=ip)
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return jsonify({"error": "Banned"}), 403
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url = request.args.get("url", "").strip()
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fmt = request.args.get("format_id", "").strip()
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sid = request.args.get("sid", "").strip()
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run_id = session.get("run_id")
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if run_id is None:
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pass
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if is_ip_banned(ip):
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log.warning("download.reject.banned", ip=ip)
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return jsonify({"error": "Banned"}), 403
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if not url or not fmt:
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log.warning("download.reject.missing_params", url=url, fmt=fmt)
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return jsonify({"error": "Missing URL or format"}), 400
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if sid in _tasks and not _tasks[sid].done():
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log.warning("download.reject.already_running", sid=sid)
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return jsonify({"error": "download already running"}), 409
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if sid != run_id:
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log.warning("download.reject.sid_mismatch", sid=sid, session_run_id=run_id)
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return jsonify({
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"error": "Session mismatch – please refresh the page and select a format again."
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}), 403
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progress_bus.register(sid)
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async def _run_download() -> Path:
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try:
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meta = await asyncio.to_thread(_lookup_cache_sync, url)
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if meta:
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chosen = next((f for f in meta["formats"] if f["format_id"] == fmt), None)
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est = (
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chosen.get("filesize")
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or chosen.get("filesize_approx")
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or 0
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) if chosen else 0
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EST_MB.set(int(est / 1_048_576))
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log.info("download.starting", sid=sid, url=url, fmt=fmt)
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path_str = await download(url, fmt, ip, sid)
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return Path(path_str)
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finally:
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_tasks.pop(sid, None)
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task = asyncio.create_task(_run_download())
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_tasks[sid] = task
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try:
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tmp_path = await task
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mime = mimetypes.guess_type(tmp_path.name)[0] or "application/octet-stream"
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log.info("download.success", file=str(tmp_path), sid=sid)
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resp = Response(
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_file_iter(tmp_path),
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headers={
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"Content-Type": mime,
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"Content-Disposition": f'attachment; filename="{tmp_path.name}"',
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},
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)
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if hasattr(resp, "call_after_response"):
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def _after():
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progress_bus.update(sid, status="finished", pct=100, progress="Done")
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progress_bus.clear(sid)
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if str(tmp_path.parent).startswith(str(TMP_DIR)):
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shutil.rmtree(tmp_path.parent, ignore_errors=True)
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resp.call_after_response(_after)
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return resp
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except asyncio.CancelledError:
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log.warning("download.cancelled", sid=sid)
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progress_bus.update(sid, status="cancelled", progress="Cancelled")
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return jsonify({"error": "Download cancelled"}), 499
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except Exception as e:
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log.exception("download.failed", sid=sid, err=str(e))
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progress_bus.update(sid, status="error", progress="Error")
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return jsonify({"error": "Download failed"}), 500
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@app.route("/cancel_download", methods=["POST"])
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async def cancel_dl():
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sid = request.args.get("sid", "").strip()
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if sid:
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task = _tasks.get(sid)
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if task and not task.done():
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task.cancel()
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progress_bus.update(sid, status="cancelled", progress="Cancelled")
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return jsonify({"status": "cancelled"})
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@app.route("/api/progress/<sid>")
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async def progress_stream(sid: str):
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q = progress_bus.subscribe(sid)
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async def gen():
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while True:
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msg = await q.get()
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yield f"data: {msg}\n\n"
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return Response(
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gen(),
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content_type="text/event-stream",
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headers={"Cache-Control": "no-store"},
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)
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@app.before_serving
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async def _on_startup():
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pass
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