304 lines
11 KiB
Python
304 lines
11 KiB
Python
#!/usr/bin/env python3
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"""
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Lokal Proxy-Server für Lara's Schachturnier
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Lädt die PGN-Datei und stellt sie mit CORS-Headern bereit.
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"""
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import http.server
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import socketserver
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import urllib.request
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import urllib.parse
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import urllib.error
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import sys
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import os
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import threading
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import time
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import json
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import re
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from datetime import datetime
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STANDINGS_URL = "https://www.deutsche-schachjugend.de/2026/odjm-d/tabelle/"
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PORT = int(os.environ.get("PORT", 8111))
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CACHE_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), "cache")
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STANDINGS_CACHE_FILE = os.path.join(CACHE_DIR, "standings.json")
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CACHE_TTL = int(os.environ.get("CACHE_TTL", 31))
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os.makedirs(CACHE_DIR, exist_ok=True)
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last_fetch_time = None
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last_standings_fetch_time = None
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current_round = 0 # wird aus der Tabelle ermittelt
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def get_pgn_url():
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return f"https://www.deutsche-schachjugend.de/2026/odjm-d/partien/{current_round}.pgn"
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def get_cache_file():
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return os.path.join(CACHE_DIR, f"runde-{current_round}.pgn")
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def fetch_pgn():
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"""Lädt die PGN-Datei von der URL als Bytes.
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Nutzt If-Modified-Since – gibt (data, changed) zurück.
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changed=False bedeutet 304 Not Modified (keine neuen Daten)."""
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global last_fetch_time
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if current_round == 0:
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return None, False
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url = get_pgn_url()
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try:
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headers = {"User-Agent": "Mozilla/5.0"}
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if last_fetch_time:
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headers["If-Modified-Since"] = datetime.utcfromtimestamp(last_fetch_time).strftime("%a, %d %b %Y %H:%M:%S GMT")
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req = urllib.request.Request(url, headers=headers)
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with urllib.request.urlopen(req, timeout=31) as response:
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data = response.read()
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last_fetch_time = time.time()
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return data, True
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except urllib.error.HTTPError as e:
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if e.code == 304:
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return None, False
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print(f"[{datetime.now().strftime('%H:%M:%S')}] HTTP-Fehler: {e}")
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return None, False
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except Exception as e:
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print(f"[{datetime.now().strftime('%H:%M:%S')}] Fehler beim Laden: {e}")
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return None, False
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def get_pgn_content_longpoll(since=0):
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"""Long-Poll: Blockiert, bis sich die PGN-Datei tatsächlich ändert.
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Antwortet nur bei neuen Daten, nie mit unverändertem Stand."""
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while True:
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cache_file = get_cache_file()
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if os.path.exists(cache_file):
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mtime = os.path.getmtime(cache_file)
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if mtime > since:
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with open(cache_file, "rb") as f:
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return f.read(), mtime
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age = time.time() - mtime
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if age >= CACHE_TTL:
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content, changed = fetch_pgn()
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if changed and content is not None:
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with open(cache_file, "wb") as f:
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f.write(content)
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new_mtime = os.path.getmtime(cache_file)
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print(f"[{datetime.now().strftime('%H:%M:%S')}] PGN via Long-Poll aktualisiert ({len(content)} Bytes)")
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return content, new_mtime
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else:
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content, changed = fetch_pgn()
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if changed and content is not None:
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with open(cache_file, "wb") as f:
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f.write(content)
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return content, os.path.getmtime(cache_file)
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time.sleep(5)
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def fetch_standings():
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"""Lädt die Tabellenseite und parst Laras Platzierung.
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Ermittelt dabei auch die aktuelle Runde."""
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global last_standings_fetch_time, current_round
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try:
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headers = {"User-Agent": "Mozilla/5.0"}
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if last_standings_fetch_time:
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headers["modified_since"] = str(last_standings_fetch_time)
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req = urllib.request.Request(STANDINGS_URL, headers=headers)
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with urllib.request.urlopen(req, timeout=31) as response:
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html = response.read().decode("utf-8", errors="replace")
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last_standings_fetch_time = time.time()
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round_info = ""
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m = re.search(r"Tabellenstand\s+nach\s+der\s+(\d+)\.\s*Runde", html)
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if m:
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detected = int(m.group(1))
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if detected != current_round:
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old = current_round
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current_round = detected
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print(f"[{datetime.now().strftime('%H:%M:%S')}] Runde erkannt: {current_round} (war {old})")
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round_info = f"nach der {m.group(1)}. Runde"
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rows = re.findall(r"<tr[^>]*>(.*?)</tr>", html, re.DOTALL | re.IGNORECASE)
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for row in rows:
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if "Lara Kiesewetter" not in row:
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continue
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cells = re.findall(r"<td[^>]*>(.*?)</td>", row, re.DOTALL)
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clean = [re.sub(r"<[^>]+>", "", c).strip() for c in cells]
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if len(clean) >= 9:
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return {
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"rank": clean[0],
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"player": "Lara Kiesewetter",
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"wins": clean[5],
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"draws": clean[6],
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"losses": clean[7],
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"points": clean[8],
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"round_info": round_info,
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}
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return None
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except Exception as e:
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print(f"Fehler beim Laden der Tabelle: {e}")
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return None
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def get_standings_content():
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"""Gibt Tabellenstand als Dict zurück, nutzt Cache."""
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now = time.time()
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if os.path.exists(STANDINGS_CACHE_FILE):
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age = now - os.path.getmtime(STANDINGS_CACHE_FILE)
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if age < 300: # 5 Minuten Cache
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with open(STANDINGS_CACHE_FILE, "r") as f:
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return json.load(f)
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data = fetch_standings()
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if data:
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with open(STANDINGS_CACHE_FILE, "w") as f:
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json.dump(data, f)
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print(f"[{datetime.now().strftime('%H:%M:%S')}] Tabellenstand aktualisiert")
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return data
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return None
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class PGNHandler(http.server.BaseHTTPRequestHandler):
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def do_GET(self):
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parsed_path = urllib.parse.urlparse(self.path)
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if parsed_path.path == "/pgn":
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params = urllib.parse.parse_qs(parsed_path.query)
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since = float(params.get("since", [0])[0])
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content, mtime = get_pgn_content_longpoll(since)
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if content:
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self.send_response(200)
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self.send_header("Content-Type", "text/plain; charset=utf-8")
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self.send_header("Access-Control-Allow-Origin", "*")
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self.send_header("Cache-Control", "no-cache")
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self.send_header("X-Cache-Mtime", str(mtime))
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self.end_headers()
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self.wfile.write(content)
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else:
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self.send_response(502)
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self.send_header("Content-Type", "application/json")
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self.send_header("Access-Control-Allow-Origin", "*")
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self.end_headers()
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self.wfile.write(json.dumps({"error": "Konnte PGN nicht laden"}).encode())
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elif parsed_path.path == "/status":
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self.send_response(200)
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self.send_header("Content-Type", "application/json")
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self.send_header("Access-Control-Allow-Origin", "*")
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self.send_header("Cache-Control", "no-cache")
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self.end_headers()
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status = {
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"status": "ok",
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"last_fetch": last_fetch_time,
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"cache_ttl": CACHE_TTL,
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"server_time": time.time()
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}
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self.wfile.write(json.dumps(status).encode())
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elif parsed_path.path == "/standings":
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data = get_standings_content()
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if data:
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self.send_response(200)
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self.send_header("Content-Type", "application/json")
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self.send_header("Access-Control-Allow-Origin", "*")
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self.send_header("Cache-Control", "max-age=300")
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self.end_headers()
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self.wfile.write(json.dumps(data).encode())
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else:
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self.send_response(502)
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self.send_header("Content-Type", "application/json")
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self.send_header("Access-Control-Allow-Origin", "*")
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self.end_headers()
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err = {"error": "Tabellendaten nicht verf\u00fcgbar"}
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self.wfile.write(json.dumps(err).encode())
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else:
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# Statische Dateien aus dem Verzeichnis
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if self.path == "/":
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self.path = "/index.html"
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filepath = os.path.join(os.path.dirname(os.path.abspath(__file__)), self.path.lstrip("/"))
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if os.path.isfile(filepath):
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content_types = {
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".html": "text/html",
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".css": "text/css",
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".js": "application/javascript",
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".json": "application/json",
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".png": "image/png",
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".jpg": "image/jpeg",
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".svg": "image/svg+xml",
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}
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ext = os.path.splitext(filepath)[1]
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content_type = content_types.get(ext, "application/octet-stream")
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with open(filepath, "rb") as f:
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content = f.read()
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self.send_response(200)
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self.send_header("Content-Type", f"{content_type}; charset=utf-8")
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self.send_header("Access-Control-Allow-Origin", "*")
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self.end_headers()
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self.wfile.write(content)
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else:
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self.send_response(404)
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self.end_headers()
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def log_message(self, format, *args):
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print(f"[{datetime.now().strftime('%H:%M:%S')}] {args[0]}")
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def background_refresh():
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"""Aktualisiert den Cache im Hintergrund."""
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while True:
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time.sleep(CACHE_TTL)
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try:
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content, changed = fetch_pgn()
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if changed and content is not None:
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cache_file = get_cache_file()
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with open(cache_file, "wb") as f:
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f.write(content)
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except Exception as e:
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print(f"[{datetime.now().strftime('%H:%M:%S')}] Hintergrund-Refresh Fehler: {e}")
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def main():
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print("=" * 50)
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print(" [TROPHY] Lara Kiesewetter – Live Schachturnier")
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print("=" * 50)
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print(f" Server läuft auf: http://localhost:{PORT}")
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print(f" Drücke Ctrl+C zum Beenden")
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print("=" * 50)
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# Runde aus Tabelle ermitteln
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standings = fetch_standings()
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if standings and current_round > 0:
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print(f"[OK] Aktuelle Runde: {current_round}")
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else:
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current_round = 1
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print("[INFO] Starte mit Runde 1 (Tabelle noch nicht verfügbar)")
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content, changed = fetch_pgn()
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if changed and content is not None:
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cache_file = get_cache_file()
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with open(cache_file, "wb") as f:
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f.write(content)
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print(f"[OK] PGN geladen ({len(content)} Bytes)")
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else:
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print("[WARN] Initialer Ladeversuch fehlgeschlagen, wird wiederholt...")
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# Hintergrund-Refresh Thread starten
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refresh_thread = threading.Thread(target=background_refresh, daemon=True)
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refresh_thread.start()
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# Server starten
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with socketserver.TCPServer(("", PORT), PGNHandler) as httpd:
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print(f"\n[SERVER] Server gestartet: http://localhost:{PORT}\n")
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try:
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httpd.serve_forever()
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except KeyboardInterrupt:
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print("\n[BYE] Server gestoppt.")
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if __name__ == "__main__":
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main()
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