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xmz7891
b62ac865ea
被控端 - 修复 MTU 问题：夹 MSS + 路径 MTU 探测（公网可用率 48% -> 100%） - 复用 HTTP 连接（免掉每次新建 TLS 的 30% 握手失败） - 每分钟回头找局域网，自动切回快 400 倍的路径 - 画面心跳帧：静止时省流量，客户端仍知道流是活的 - 锁屏时给出可操作的提示 手表端 - 内置 GTS Root R4 / GlobalSign Root CA，修 SSLHandshakeException - 连接错误翻译成人话（证书/时间/解析/超时分别提示） - 经中转连上后用服务器报的地址刷新已配对记录 - 新增局域网连接页面、服务器延迟检测 服务器端 - 支持 chunked 请求体（修每 16 秒一次的连接错乱与大面积 502） - 网络调优脚本 net-tune.sh（开机自动应用） - 管理页：批量删除、网络体检、下载区 - 隧道改 HTTP/2 + 双连接 文档 - 许可协议 / 安装前必读 / 安装后须知（作者：小麦子）
111 lines
3.4 KiB
Python
111 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
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"""单实例控制。
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窗口关掉后程序仍在后台跑，用户再次双击 EXE 时应该能**找回窗口**，
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而不是又起一个进程（那样端口会冲突，用户会以为坏了）。
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做法：主实例占住一个本机回环端口；后启动的实例连上去发个 "show" 就退出。
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"""
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from __future__ import annotations
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import socket
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import threading
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CONTROL_PORT = 8767
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_CMD_SHOW = b"SHOW"
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class InstanceLock:
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def __init__(self, port: int = CONTROL_PORT):
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self.port = port
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self._sock: socket.socket | None = None
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self._thread: threading.Thread | None = None
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self._running = False
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self.on_show = None # 收到"显示窗口"请求时的回调
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@property
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def is_primary(self) -> bool:
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return self._sock is not None
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def try_claim(self) -> bool:
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"""尝试成为主实例。失败说明已有实例在运行。"""
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# 关键：Windows 上 SO_REUSEADDR 会允许第二个进程绑同一个端口，
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# 导致单实例判定失效。Windows 必须用 SO_EXCLUSIVEADDRUSE。
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if hasattr(socket, "SO_EXCLUSIVEADDRUSE"):
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try:
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE, 1)
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except OSError:
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pass
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else:
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.bind(("127.0.0.1", self.port))
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sock.listen(4)
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sock.settimeout(1.0)
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except OSError:
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try:
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sock.close()
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except Exception:
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pass
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return False
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self._sock = sock
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self._running = True
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self._thread = threading.Thread(target=self._loop, name="instance",
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daemon=True)
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self._thread.start()
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return True
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def _loop(self) -> None:
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while self._running:
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try:
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conn, _addr = self._sock.accept()
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except socket.timeout:
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continue
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except OSError:
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break
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try:
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conn.settimeout(2.0)
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data = conn.recv(32)
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if data.strip() == _CMD_SHOW and self.on_show:
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try:
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self.on_show()
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except Exception:
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pass
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conn.sendall(b"OK")
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except OSError:
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pass
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finally:
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try:
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conn.close()
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except OSError:
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pass
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def release(self) -> None:
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self._running = False
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if self._thread is not None and self._thread.is_alive():
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self._thread.join(timeout=2.0)
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self._thread = None
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if self._sock is not None:
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try:
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self._sock.close()
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except OSError:
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pass
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self._sock = None
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def signal_show(port: int = CONTROL_PORT, timeout: float = 2.0) -> bool:
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"""通知已在运行的实例把窗口显示出来。"""
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try:
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sock = socket.create_connection(("127.0.0.1", port), timeout=timeout)
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sock.sendall(_CMD_SHOW)
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try:
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sock.recv(16)
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except OSError:
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pass
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sock.close()
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return True
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except OSError:
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return False
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