FROM python:3-alpine

ENV M3U_URL=https://raw.githubusercontent.com/best-fan/iptv-sources/master/cn_all.m3u8

COPY <<'APP' /app.py
import urllib.request, threading, time, os
from http.server import HTTPServer, BaseHTTPRequestHandler

M3U_URL = os.environ.get('M3U_URL', 'https://raw.githubusercontent.com/best-fan/iptv-sources/master/cn_all.m3u8')
content = ""

def refresh():
    global content
    while True:
        try:
            with urllib.request.urlopen(M3U_URL, timeout=30) as r:
                content = r.read().decode()
                print(f"[IPTV] 源已更新：{len(content)} 字节")
        except Exception as e:
            print(f"[IPTV] 更新失败：{e}")
        time.sleep(43200)  # 12小时

class Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == '/iptv':
            self.send_response(200)
            self.send_header('Content-Type', 'audio/x-mpegurl')
            self.send_header('Access-Control-Allow-Origin', '*')
            self.end_headers()
            self.wfile.write(content.encode())
        else:
            self.send_response(404)
            self.end_headers()
    def log_message(self, *a): pass

t = threading.Thread(target=refresh, daemon=True)
t.start()
time.sleep(5)
HTTPServer(('0.0.0.0', 50086), Handler).serve_forever()
APP

EXPOSE 50086

CMD ["python", "/app.py"]