Mirror Infrastructure

import requests
from datetime import datetime, timedelta
import pickle

CACHE_FILE = 'trackers_cache.pkl'
CACHE_DURATION = timedelta(hours=24)

def get_trackers_cached():
    try:
        with open(CACHE_FILE, 'rb') as f:
            cache = pickle.load(f)
            if datetime.now() - cache['timestamp'] < CACHE_DURATION:
                return cache['trackers']
    except FileNotFoundError:
        pass
    
    # Try mirrors in order of preference
    mirrors = [
        'https://cdn.jsdelivr.net/gh/ngosang/trackerslist@master/trackers_best.txt',
        'https://ngosang.github.io/trackerslist/trackers_best.txt',
        'https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_best.txt'
    ]
    
    for mirror in mirrors:
        try:
            response = requests.get(mirror, timeout=10)
            response.raise_for_status()
            trackers = [line.strip() for line in response.text.split('\n') if line.strip()]
            
            # Cache the result
            with open(CACHE_FILE, 'wb') as f:
                pickle.dump({'timestamp': datetime.now(), 'trackers': trackers}, f)
            
            return trackers
        except requests.RequestException:
            continue
    
    raise Exception('All mirrors failed')