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2026-10-19 14:10:43 +00:00 · 2026-10-06 19:01:05 +08:00
commit b705216e4a
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+# -*- coding: utf-8 -*-
+"""配置与设备凭据持久化。
+
+数据放在程序目录下的 data/，绿色便携，不写注册表。
+"""
+from __future__ import annotations
+
+import json
+import os
+import secrets
+import socket
+import sys
+import threading
+import time
+from pathlib import Path
+
+DEFAULT_SETTINGS = {
+    "port": 8765,
+    "server_name": "",
+    "allow_run": True,          # 允许自定义命令（可在界面关闭）
+    "allow_power": True,        # 允许关机/重启（可在界面关闭）
+    "allow_screen": True,       # 允许屏幕镜像/截屏（可在界面关闭）
+    "start_minimized": False,   # 启动后直接最小化到托盘
+    "allow_new_pairing": True,  # 是否允许新设备配对
+    "image_timeout": 0,         # 图片显示秒数，0=手动关闭
+    "image_display": "window",  # 投图方式: window=屏幕中间普通窗口 / fullscreen=全屏 / custom=自定义大小
+    "image_custom_width": 0,    # 自定义宽度(像素)，0=自动
+    "image_custom_height": 0,   # 自定义高度(像素)，0=自动
+    "image_window_title": "",  # 投图窗口标题模板，可用 {name}；空=默认
+    "tts_voice": "",           # 默认 TTS 音色，空=系统默认
+    "tts_rate": 0,             # 语速 -10~10
+    "mp3_dir": "",             # 本机音乐目录，空=自动找 音乐/Music
+    # ---- 下面三项是"边界可配置"：由电脑主人决定允许什么 ----
+    "file_roots": "",          # 额外允许的目录，分号分隔
+    "extra_apps": "",          # 自定义快捷程序：显示名=路径，分号分隔
+    "extra_commands": "",      # 自定义命令别名：显示名=命令，分号分隔
+    "download_dir": "received",
+    "screen_max_width": 480,    # 镜像帧最大宽度
+    # 镜像 JPEG 质量。
+    # 实测质量对编码耗时几乎没影响（都是 ~17ms），主要影响体积：
+    #   55 -> 30KB/帧    72 -> 45KB/帧    85 -> 70KB/帧
+    # 取 72：画质明显更清楚，局域网完全带得动。
+    "screen_quality": 72,
+    # 默认帧率。
+    # 实测抓屏 33ms + 编码 17ms = 50ms，也就是**硬件上限约 20 帧/秒**。
+    # 原来写 3 是白白浪费了 6 倍的能力。
+    # 取 12：够顺，又给抓屏留了余量，不至于把 CPU 占满。
+    # （画面静止时会自动降频，见 screen.py 的 _loop）
+    "screen_fps": 12,
+}
+
+
+class Store:
+    """线程安全的 JSON 存储。"""
+
+    def __init__(self, directory: Path):
+        self.dir = Path(directory)
+        try:
+            self.dir.mkdir(parents=True, exist_ok=True)
+            probe = self.dir / ".write_test"
+            probe.write_text("ok", encoding="utf-8")
+            probe.unlink()
+        except OSError:
+            # 装到 Program Files 这类只读目录时，原来会直接崩在启动。
+            # 退到用户自己的 AppData —— 那里一定可写。
+            fallback = Path(os.environ.get("LOCALAPPDATA",
+                                           str(Path.home()))) / "LanRemote"
+            try:
+                fallback.mkdir(parents=True, exist_ok=True)
+            except OSError:
+                pass
+            self.dir = fallback
+        self._lock = threading.RLock()
+        self.settings_file = self.dir / "settings.json"
+        self.devices_file = self.dir / "devices.json"
+        self.settings = self._load(self.settings_file, dict(DEFAULT_SETTINGS))
+        self.devices = self._load(self.devices_file, {})
+        if not self.settings.get("server_name"):
+            self.settings["server_name"] = socket.gethostname()
+
+    # ---------- 基础读写 ----------
+
+    @staticmethod
+    def _load(path: Path, fallback):
+        try:
+            with open(path, "r", encoding="utf-8") as fh:
+                data = json.load(fh)
+            if isinstance(data, dict):
+                if isinstance(fallback, dict) and fallback:
+                    merged = dict(fallback)
+                    merged.update(data)
+                    return merged
+                return data
+        except (OSError, ValueError):
+            pass
+        return fallback
+
+    def save_settings(self) -> None:
+        with self._lock:
+            self._write(self.settings_file, self.settings)
+
+    def save_devices(self) -> None:
+        with self._lock:
+            self._write(self.devices_file, self.devices)
+
+    @staticmethod
+    def _write(path: Path, data) -> None:
+        tmp = path.with_suffix(path.suffix + ".tmp")
+        with open(tmp, "w", encoding="utf-8") as fh:
+            json.dump(data, fh, ensure_ascii=False, indent=2)
+        os.replace(tmp, path)
+
+    def get(self, key: str, default=None):
+        with self._lock:
+            return self.settings.get(key, default)
+
+    def set(self, key: str, value) -> None:
+        with self._lock:
+            self.settings[key] = value
+        self.save_settings()
+
+    # ---------- 配对码 ----------
+
+    def new_pairing_code(self, digits: int = 6) -> str:
+        with self._lock:
+            code = "".join(secrets.choice("0123456789") for _ in range(digits))
+            self.settings["pairing_code"] = code
+            self.settings["pairing_created"] = time.time()
+        self.save_settings()
+        return code
+
+    MIN_CODE_LEN = 6
+    MAX_CODE_LEN = 16
+
+    def set_pairing_code(self, code: str) -> str:
+        """设成用户自己的配对码。返回规范化后的值。
+
+        只存在本机 data/settings.json 里，不写进任何要分发的东西。
+        """
+        cleaned = "".join(ch for ch in str(code or "").strip()
+                          if ch.isdigit() or ch.isalpha())
+        if len(cleaned) < self.MIN_CODE_LEN:
+            raise ValueError(f"配对码至少 {self.MIN_CODE_LEN} 位")
+        if len(cleaned) > self.MAX_CODE_LEN:
+            raise ValueError(f"配对码最多 {self.MAX_CODE_LEN} 位")
+        with self._lock:
+            self.settings["pairing_code"] = cleaned
+            self.settings["pairing_created"] = time.time()
+        self.save_settings()
+        return cleaned
+
+    def pairing_code(self) -> str:
+        return self.get("pairing_code", "")
+
+    # ---------- 设备 ----------
+
+    def remember_device(self, device_id: str, name: str) -> str:
+        token = secrets.token_hex(16)
+        with self._lock:
+            self.devices[device_id] = {
+                "name": name or "未知设备",
+                "token": token,
+                "paired_at": time.time(),
+                "last_seen": time.time(),
+            }
+        self.save_devices()
+        return token
+
+    def verify_token(self, device_id: str, token: str) -> bool:
+        with self._lock:
+            rec = self.devices.get(device_id)
+        if not rec:
+            return False
+        ok = secrets.compare_digest(str(rec.get("token", "")), str(token or ""))
+        if ok:
+            with self._lock:
+                rec["last_seen"] = time.time()
+            self.save_devices()
+        return ok
+
+    def touch_device(self, device_id: str) -> None:
+        with self._lock:
+            rec = self.devices.get(device_id)
+            if rec:
+                rec["last_seen"] = time.time()
+        self.save_devices()
+
+    def forget_device(self, device_id: str) -> bool:
+        with self._lock:
+            existed = self.devices.pop(device_id, None) is not None
+        if existed:
+            self.save_devices()
+        return existed
+
+    def device_list(self) -> list[dict]:
+        with self._lock:
+            items = []
+            for dev_id, rec in self.devices.items():
+                items.append({
+                    "id": dev_id,
+                    "name": rec.get("name", ""),
+                    "paired_at": rec.get("paired_at", 0),
+                    "last_seen": rec.get("last_seen", 0),
+                })
+        return sorted(items, key=lambda d: d["last_seen"], reverse=True)
+
+    def received_dir(self) -> Path:
+        path = self.dir.parent / str(self.get("download_dir", "received"))
+        path.mkdir(parents=True, exist_ok=True)
+        return path
+
+
+def app_dir() -> Path:
+    """程序所在目录（兼容 PyInstaller 冻结环境）。"""
+    if getattr(sys, "frozen", False):
+        return Path(sys.executable).resolve().parent
+    return Path(__file__).resolve().parent.parent
+
+
+def data_dir() -> Path:
+    return app_dir() / "data"