AI 生成: 一个自动构建 APTV 直播源的脚本工具，每天自动更新央视、卫视、地方台频道，支持源过滤、去重和可用性检测。

filter.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+"""可用性检测与去重"""
+
+import requests
+from concurrent.futures import ThreadPoolExecutor, as_completed
+
+
+def check_url(url, timeout=5):
+    """检测 URL 是否可用"""
+    try:
+        resp = requests.get(url, timeout=timeout, stream=True, headers={
+            "User-Agent": "Mozilla/5.0 (APTV-Live-Source-Builder)"
+        })
+        return resp.status_code == 200
+    except Exception:
+        return False
+
+
+def filter_available(channels, timeout=5, max_workers=20):
+    """并发过滤可用源"""
+    if not channels:
+        return []
+
+    results = []
+    with ThreadPoolExecutor(max_workers=max_workers) as executor:
+        future_map = {
+            executor.submit(check_url, ch["url"], timeout): ch
+            for ch in channels
+        }
+        for future in as_completed(future_map):
+            ch = future_map[future]
+            try:
+                ok = future.result()
+            except Exception:
+                ok = False
+            if ok:
+                results.append(ch)
+    return results
+
+
+def dedup(channels):
+    """按 URL 和频道名去重"""
+    seen_urls = set()
+    seen_names = set()
+    result = []
+    for ch in channels:
+        url = ch["url"]
+        name = ch["name"]
+        if url in seen_urls:
+            continue
+        if name in seen_names:
+            continue
+        seen_urls.add(url)
+        seen_names.add(name)
+        result.append(ch)
+    return result