feat: 支持第三方节点订阅

lite/rrpp_core/third_party_subscriptions.py

@@ -0,0 +1,53 @@
+"""第三方 RRPP Client JSON 订阅的下载、校验与展示辅助。"""
+
+import json
+import urllib.request
+from urllib.parse import urlsplit, urlunsplit
+
+
+def fetch_nodes(url: str, timeout=15):
+    """直连读取一个第三方订阅，避免首次导入受系统代理残留影响。"""
+    opener = urllib.request.build_opener(urllib.request.ProxyHandler({}))
+    request = urllib.request.Request(
+        url,
+        headers={"Accept": "application/json", "User-Agent": "RRPP-Lite"},
+    )
+    with opener.open(request, timeout=timeout) as response:
+        return validate_nodes(json.loads(response.read().decode("utf-8-sig")))
+
+
+def validate_nodes(data):
+    """校验 RRPP Client 节点数组，返回可安全写入本地缓存的副本。"""
+    if not isinstance(data, list) or not data:
+        raise ValueError("订阅应为非空的 JSON 节点数组")
+    result = []
+    for index, node in enumerate(data, 1):
+        if not isinstance(node, dict):
+            raise ValueError(f"第 {index} 项不是节点对象")
+        domain = str(node.get("domain") or "").strip()
+        method = (node.get("methods") or {}).get("http") or {}
+        port = method.get("port", node.get("port"))
+        try:
+            port = int(port)
+        except (TypeError, ValueError):
+            port = 0
+        if not domain:
+            raise ValueError(f"第 {index} 项缺少 domain")
+        if not 1 <= port <= 65535:
+            raise ValueError(f"第 {index} 项的 HTTP 代理端口无效")
+        result.append(dict(node))
+    return result
+
+
+def mask_url(url: str) -> str:
+    """用于 UI 展示，隐藏查询参数和 URL 用户信息中的敏感令牌。"""
+    try:
+        parts = urlsplit(str(url))
+        host = parts.hostname or ""
+        if parts.port:
+            host = f"{host}:{parts.port}"
+        if parts.username:
+            host = "***@" + host
+        return urlunsplit((parts.scheme, host, parts.path, "…" if parts.query else "", ""))
+    except Exception:
+        return "已隐藏订阅地址"