feat(lite): add built-in PAC mode and publish 9999091820

lite/main.py

@@ -1368,6 +1368,24 @@ def _set_local_port(port):
     _settings_save(data)
     log(f"代理转发端口已保存: {port}（下次开启代理生效）")
 
+def _use_builtin_pac():
+    """是否使用固定本地代理承载系统流量、由转发器内部执行 PAC 判断。"""
+    return bool(_settings_load().get("builtin_pac", False))
+
+def _set_builtin_pac(enabled):
+    """保存内置 PAC 偏好，下一次开启代理时生效。"""
+    data = _settings_load()
+    data["builtin_pac"] = bool(enabled)
+    _settings_save(data)
+
+def _should_use_system_pac(use_pac, use_builtin_pac):
+    """决定系统侧是否下发 PAC；内置 PAC 只保留转发器内部智能分流。"""
+    return bool(use_pac and not use_builtin_pac)
+
+def _should_use_internal_pac(use_pac, use_builtin_pac):
+    """决定转发器内部是否启用 PAC 智能直连/代理判断。"""
+    return bool(use_pac or use_builtin_pac)
+
 def _update_via_proxy():
     """更新检查/下载是否走节点隧道（CONNECT）；设置项，默认关=直连仓库。"""
     return bool(_settings_load().get("update_via_proxy", False))
@@ -2612,10 +2630,12 @@ def _settings_services():
         load_icon=load_icon,
         version=VERSION,
         get_port=lambda: _TLS_LOCAL_PORT,
+        get_builtin_pac=_use_builtin_pac,
         get_update_via_proxy=_update_via_proxy,
         get_skip_update_check=_skip_update_check,
         parse_port=_parse_port,
         set_port=_set_local_port,
+        set_builtin_pac=_set_builtin_pac,
         set_update_via_proxy=_set_update_via_proxy,
         set_skip_update_check=_set_skip_update_check,
         open_whitelist=lambda parent: FixedRouteDialog(_fixed_route_services(), parent).exec_(),
@@ -2954,6 +2974,7 @@ class MainWindow(QWidget):
         # 在 GUI 线程读取控件状态传参，避免子线程直接访问 Qt 控件（非线程安全）
         use_pac = self.cb_pac.isChecked()
         use_bypass_lan = self.cb_bypass_lan.isChecked()
+        use_builtin_pac = _use_builtin_pac()
         self._start_cancel_event = threading.Event()
         self._start_in_progress = True
         # 网络探测可能需要数秒；此时保留按钮给用户取消，而不是把界面锁死。
@@ -2961,12 +2982,12 @@ class MainWindow(QWidget):
         self.btn_toggle.setEnabled(True)
         threading.Thread(
             target=self._start_thread,
-            args=(use_pac, use_bypass_lan, self._start_cancel_event),
+            args=(use_pac, use_bypass_lan, use_builtin_pac, self._start_cancel_event),
             daemon=True,
         ).start()
-    def _start_thread(self, use_pac, use_bypass_lan, cancel_event):
+    def _start_thread(self, use_pac, use_bypass_lan, use_builtin_pac, cancel_event):
         try:
-            self._start_proxy(use_pac, use_bypass_lan, cancel_event)
+            self._start_proxy(use_pac, use_bypass_lan, use_builtin_pac, cancel_event)
             _raise_if_start_cancelled(cancel_event)
             self._op_done.emit("start", True)
         except _StartCancelled:
@@ -2991,8 +3012,8 @@ class MainWindow(QWidget):
             _tls_stop()
             _stop_pac_server()
 
-    def _start_proxy(self, use_pac, use_bypass_lan, cancel_event=None):
-        """启动本地转发器并设置系统代理（PAC/固定两种模式），可在后台线程调用。"""
+    def _start_proxy(self, use_pac, use_bypass_lan, use_builtin_pac=False, cancel_event=None):
+        """启动本地转发器并设置系统代理（普通 PAC、内置 PAC 或固定代理）。"""
         if _endpoint_domain() == "???":
             # 未配置节点时禁止开启：否则系统代理会指向连不通任何目标的转发器，导致断网
             raise RuntimeError("未配置节点：请先通过 nodes_url 在线更新或 nodes_tool 导入节点配置")
@@ -3008,16 +3029,18 @@ class MainWindow(QWidget):
         if jump_chain:
             log(f"  跳板路径: {_jump_route_text(current_node)}")
         # PAC 模式：全部流量进转发器，按域名表/解析 IP 智能分流
-        if use_pac:
+        use_internal_pac = _should_use_internal_pac(use_pac, use_builtin_pac)
+        if use_internal_pac:
             _load_cn_ranges()
             _load_force_proxy_suffixes()
             _load_direct_domains()
         _raise_if_start_cancelled(cancel_event)
-        _tls_start(ep, _endpoint_port(), use_tls=True, bypass_lan=use_bypass_lan, smart=use_pac,
+        _tls_start(ep, _endpoint_port(), use_tls=True, bypass_lan=use_bypass_lan,
+                   smart=use_internal_pac,
                    jump_chain=jump_chain)
         try:
             _raise_if_start_cancelled(cancel_event)
-            if use_pac:
+            if _should_use_system_pac(use_pac, use_builtin_pac):
                 # 本地生成全量转发 PAC（不再从服务器拉取），全部流量交给转发器做智能分流
                 pac_content = _build_pac(f"{PROXY_HOST}:{PROXY_PORT}")
                 if use_bypass_lan:
@@ -3035,6 +3058,8 @@ class MainWindow(QWidget):
                     _raise_if_start_cancelled(cancel_event)
                     proxy_on(bypass_lan=use_bypass_lan)
                     self._proxy_set_by_us = True
+                if use_builtin_pac:
+                    log(f"使用内置 PAC：系统固定代理 127.0.0.1:{PROXY_PORT}，转发器内部智能分流")
             _raise_if_start_cancelled(cancel_event)
             if use_bypass_lan:
                 log("不代理内网 IP：内网地址将直连")