重构：模块化 RRPP Lite 并更新入口

lite/rrpp_core/pac_data.py

@@ -0,0 +1,53 @@
+"""PAC 数据文件的网络传输与安全落盘。"""
+
+import json
+import os
+import urllib.request
+from pathlib import Path
+
+
+def read_version(path):
+    """读取 PAC JSON 的 version/date；无效文件返回空字符串。"""
+    try:
+        data = json.loads(Path(path).read_text("utf-8"))
+        return str(data.get("version") or ""), str(data.get("date") or "")
+    except Exception:
+        return "", ""
+
+
+def no_proxy_opener():
+    """创建忽略环境/系统代理的直连 HTTP opener。"""
+    return urllib.request.build_opener(urllib.request.ProxyHandler({}))
+
+
+def fetch_json(url, timeout=15, tries=2):
+    """以直连方式拉取 JSON；最后一次失败时保留原始异常。"""
+    opener = no_proxy_opener()
+    for attempt in range(tries):
+        try:
+            with opener.open(url, timeout=timeout) as response:
+                return json.loads(response.read().decode("utf-8"))
+        except Exception:
+            if attempt == tries - 1:
+                raise
+
+
+def validate_document(name, data):
+    """校验各 PAC 文件的最小结构，避免错误响应覆盖有效缓存。"""
+    if not isinstance(data, dict):
+        return False
+    if name in ("pac_domains", "pac_direct_domains"):
+        return isinstance(data.get("domains"), list)
+    if name == "pac_ip_cn":
+        return isinstance(data.get("cidrs"), list)
+    return False
+
+
+def atomic_write(directory, name, data):
+    """将 PAC JSON 以 tmp + replace 原子写入指定用户目录。"""
+    directory = Path(directory)
+    directory.mkdir(parents=True, exist_ok=True)
+    target = directory / f"{name}.json"
+    temporary_path = directory / f"{name}.json.tmp"
+    temporary_path.write_text(json.dumps(data, ensure_ascii=False), "utf-8")
+    os.replace(temporary_path, target)