414 lines
17 KiB
TypeScript
414 lines
17 KiB
TypeScript
import { spawn } from 'node:child_process';
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import os from 'node:os';
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import { BrowserWindow, app, dialog } from 'electron';
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import {
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CLIENT_COMMAND_LABELS,
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CLIENT_HEARTBEAT_INTERVAL_MS,
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isNewerVersion,
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type ClientCommandDto,
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type ClientCommandKind,
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type ClientHeartbeatRequest,
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type ClientHeartbeatResponse,
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type ClientUpdateInfoDto,
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} from '@classhelper/shared';
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import { maybeInstallPendingUpdate, considerUpdate } from './auto-update.js';
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import { getConfig } from './config.js';
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import { island } from './island.js';
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import { logger } from './logger.js';
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/**
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* 桌面客户端的服务端联动代理(心跳上报)。
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*
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* **为什么是"客户端定时拉"而不是服务端推**:教室机的连接经常断(代理、休眠、重启),
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* 而「这台机器是什么版本、要不要更新、有没有待执行命令」必须下次上线就能补上 —— 所以统一用
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* 「服务端记状态 + 客户端定时上报」的范式(与 ClassIsland 插件的上报同一套路),不引入新的长连接握手。
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* 每次上报的响应里同时带回「服务端指定的目标版本 + 待执行命令」。
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*
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* 三条边界:
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* 1. **没有 token 就不上报**:未登录时静默跳过(登录后下一次自然就上报了),
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* 不能拿空令牌去打服务端,否则日志里会刷满 401;
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* 2. **401/403 退避到 5 分钟**:令牌可能已失效(班级密码被改 / 令牌过期),
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* 继续 30 秒一次只是白刷服务端与日志;
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* 3. **冒烟模式默认不上报**:每次冒烟都在服务端库里造一条设备记录没有意义,
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* 只有显式 `ELECTRON_SMOKE_CLIENT_AGENT=1` 时才照常跑(给需要验证这条链路的用例用)。
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*/
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/** 启动后第一次上报的延迟:等窗口、登录流程与灵动岛都就绪,也不跟首屏抢带宽 */
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const FIRST_BEAT_DELAY_MS = 3_000;
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/** 令牌失效(401/403)后的退避间隔:5 分钟一次,直到用户重新登录 */
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const UNAUTHORIZED_BACKOFF_MS = 5 * 60_000;
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/** 单次上报的超时:教室机网络慢,但也不能挂着不放 */
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const HEARTBEAT_TIMEOUT_MS = 10_000;
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/**
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* 远控命令的「本机二次确认」等待时长:60 秒内没人点确认就按取消处理。
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*
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* 为什么必须有这个超时:管理员在办公室下发关机,而教室里可能已经没人了 ——
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* 一个永远挂着等确认的对话框会让这条命令一直"待执行",既没执行也看不出失败。
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*/
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const COMMAND_CONFIRM_TIMEOUT_MS = 60_000;
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/**
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* 「在线」判定窗口:与 shared 的 `CLIENT_ONLINE_WINDOW_MS`(90 秒)同口径 ——
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* 连续丢两次心跳(30 秒 × 3)才算离线。这里不复用那个常量是因为它属于**服务端**的判定口径,
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* 客户端展示的是"我这边的上报还新不新",单独留一个本地常量更容易看出两边的关系。
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*/
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const ONLINE_WINDOW_MS = 90_000;
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/** 对外暴露的联动状态(设置页「服务端联动状态」与冒烟断言用) */
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export interface ClientAgentStatus {
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/** 设备标识尾号(服务端设备列表里显示的那串用来对账,完整 UUID 不上界面) */
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deviceKeyTail: string;
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/** 最近一次上报成功的时刻(ISO 字符串;从未上报过为 null) */
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lastHeartbeatAt: string | null;
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/** 最近一次失败的原因(空串 = 最近一次是成功的) */
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lastError: string;
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/** 已下载待安装的版本(空串 = 无) */
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pendingUpdateVersion: string;
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/** 服务端最近一次要求升到的版本(空串 = 没要求) */
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updateTargetVersion: string;
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/** 是否接受服务端统一下发的自动更新(配置值,供设置页回显) */
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autoUpdate: boolean;
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/** 最近 90 秒内上报成功过(与服务端的在线口径一致) */
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online: boolean;
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}
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interface AgentState {
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running: boolean;
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/** 当前心跳定时器(退避期间与正常节奏共用它) */
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timer: ReturnType<typeof setTimeout> | null;
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/** 正在上报:避免手动「立即上报」与定时器撞在一起 */
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beating: boolean;
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lastHeartbeatAt: string | null;
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lastError: string;
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updateTargetVersion: string;
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}
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const state: AgentState = {
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running: false,
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timer: null,
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beating: false,
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lastHeartbeatAt: null,
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lastError: '',
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updateTargetVersion: '',
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};
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/** 设备标识尾号:取后 8 位(足够对账,又不至于把完整 UUID 贴到界面上) */
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export function deviceKeyTail(deviceKey: string): string {
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const trimmed = deviceKey.trim();
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if (!trimmed) return '';
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return trimmed.length > 8 ? trimmed.slice(-8) : trimmed;
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}
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/** 冒烟模式且没有显式打开联动开关时,一律不上报(避免每次冒烟都在库里造设备记录) */
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function isAgentSuppressed(): boolean {
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return process.env.ELECTRON_SMOKE_TEST === '1' && process.env.ELECTRON_SMOKE_CLIENT_AGENT !== '1';
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}
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/**
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* 上报里的"这台机器现在在干什么"。
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*
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* 取值就三种(服务端设备列表直接展示这段文字):
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* - `上课中` —— 灵动岛按渲染进程上报的课表状态判定正在上课(此时绝不安装更新);
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* - `使用中` —— 主窗口可见,人正在用;
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* - `待机` —— 窗口隐藏(最小化到托盘),机器空闲。
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*/
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function currentStateNote(): string {
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if (island.getState().inClass) return '上课中';
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const win = BrowserWindow.getAllWindows().find((item) => !item.isDestroyed());
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return win?.isVisible() ? '使用中' : '待机';
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}
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/** 已下载待安装的版本;没有则 null(服务端把它记进设备的 `pendingVersion`) */
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function pendingVersionOrNull(): string | null {
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const pending = getConfig().pendingUpdateVersion.trim();
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return pending ? pending : null;
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}
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/** 清掉待执行的心跳定时器(幂等) */
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function clearTimer(): void {
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if (state.timer !== null) {
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clearTimeout(state.timer);
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state.timer = null;
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}
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}
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/** 排下一次上报;`delayMs` 不传时用正常节奏 */
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function scheduleNext(delayMs: number = CLIENT_HEARTBEAT_INTERVAL_MS): void {
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if (!state.running) return;
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clearTimer();
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state.timer = setTimeout(() => {
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state.timer = null;
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void beat();
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}, delayMs);
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}
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/**
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* 一次上报(含响应处理)。
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*
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* 失败一律**不抛**:网络抖动是教室机的常态,只记一行日志并按原节奏重试;
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* 只有 401/403 才退避(见文件头说明)。
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*/
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async function beat(): Promise<void> {
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if (state.beating) return;
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if (isAgentSuppressed()) {
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// 冒烟模式:照原节奏空转(不碰服务端,也不在库里造设备记录)
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state.lastError = '';
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scheduleNext();
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return;
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}
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const config = getConfig();
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const token = config.token?.trim() ?? '';
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if (!token) {
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// 未登录:不打服务端、不记错误,等下次心跳(登录后自然会带上令牌)
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logger.debug('客户端上报:尚未登录(没有令牌),本次跳过');
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scheduleNext();
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return;
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}
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state.beating = true;
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let backoff = false;
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try {
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const body: ClientHeartbeatRequest = {
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deviceKey: config.deviceKey,
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name: os.hostname(),
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clientVersion: app.getVersion(),
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platform: `${process.platform}-${process.arch}`,
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pendingVersion: pendingVersionOrNull(),
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stateNote: currentStateNote(),
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};
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const response = await fetch(`${config.serverUrl}/api/clients/heartbeat`, {
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method: 'POST',
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headers: {
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'content-type': 'application/json',
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authorization: `Bearer ${token}`,
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},
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body: JSON.stringify(body),
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signal: AbortSignal.timeout(HEARTBEAT_TIMEOUT_MS),
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});
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if (response.status === 401 || response.status === 403) {
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// 令牌失效:退避到 5 分钟一次,直到用户重新登录
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backoff = true;
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state.lastError = `上报被拒绝(HTTP ${response.status}),可能登录已过期,请重新登录`;
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logger.warn(`客户端上报:服务端返回 HTTP ${response.status},退避为 5 分钟一次`);
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return;
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}
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if (!response.ok) {
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state.lastError = `服务端返回 HTTP ${response.status}`;
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logger.warn(`客户端上报失败:HTTP ${response.status}(${HEARTBEAT_INTERVAL_TEXT})`);
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return;
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}
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const payload = (await response.json()) as ClientHeartbeatResponse;
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state.lastHeartbeatAt = new Date().toISOString();
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state.lastError = '';
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state.updateTargetVersion = payload.updateTargetVersion?.trim() ?? '';
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logger.debug(
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`客户端上报成功(设备尾号 ${deviceKeyTail(config.deviceKey)},状态 ${body.stateNote ?? '-'}` +
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`${state.updateTargetVersion ? `,服务端要求升到 ${state.updateTargetVersion}` : ''})`,
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);
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void handleCommand(payload.command);
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await handleUpdate(payload.update, payload.updateTargetVersion);
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} catch (error) {
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// 网络错误 / 超时 / JSON 解析失败:按原节奏重试
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state.lastError = error instanceof Error ? error.message : String(error);
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logger.warn(`客户端上报失败(将于 ${HEARTBEAT_INTERVAL_TEXT} 后重试):${state.lastError}`);
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} finally {
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state.beating = false;
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// 每次心跳(无论成败)都顺手看一下有没有下载好的更新该装了 —— 上课/窗口可见时会自动跳过
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void maybeInstallPendingUpdate();
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scheduleNext(backoff ? UNAUTHORIZED_BACKOFF_MS : CLIENT_HEARTBEAT_INTERVAL_MS);
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}
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}
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const HEARTBEAT_INTERVAL_TEXT = `${Math.round(CLIENT_HEARTBEAT_INTERVAL_MS / 1000)} 秒`;
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/**
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* 服务端下发的远控命令(关机 / 重启 / 注销 / 锁屏)。
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*
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* 两道护栏缺一不可(用户要求「必须二次确认」):
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* 1. **本机二次确认**:弹一个默认选中「取消」的对话框,60 秒不确认按取消处理 ——
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* 服务端那边虽然也确认过,但真正会被关掉的机器上必须有人当场知道;
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* 2. **同一条命令只弹一次**:它随每次心跳重复下发,用内存集合去重,避免 30 秒弹一个框。
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*
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* 执行后**必须回执**(`POST /api/clients/commands/:id/ack`,body 带 deviceKey):
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* 否则服务端那条命令会一直挂在"待执行"里,Web 端看不到结果。回执失败时把结果暂存,
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* 下一次心跳只重试回执、不重复弹窗。
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*/
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const inFlightCommands = new Set<string>();
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const unackedResults = new Map<string, { ok: boolean; result: string }>();
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async function handleCommand(command: ClientCommandDto | null): Promise<void> {
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if (!command) return;
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const label = CLIENT_COMMAND_LABELS[command.kind] ?? command.kind;
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const expired =
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command.expiresAt !== null && Number.isFinite(Date.parse(command.expiresAt))
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? Date.parse(command.expiresAt) < Date.now()
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: false;
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if (expired) {
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logger.warn(`收到已过期的远控命令(${label}),已忽略:${command.payload || '无备注'}`);
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return;
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}
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// 处理过但回执没送达:只重试回执
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const pending = unackedResults.get(command.id);
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if (pending) {
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await ackCommand(command.id, pending.ok, pending.result);
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return;
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}
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// 正在等本机确认:不要再弹第二个框
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if (inFlightCommands.has(command.id)) return;
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inFlightCommands.add(command.id);
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try {
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const confirmed = await confirmCommand(label, command.payload);
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if (!confirmed) {
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const result = '本机用户取消(或 60 秒未确认)';
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logger.warn(`远控命令「${label}」未执行:${result}`);
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await ackCommand(command.id, false, result);
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return;
|
|||
|
|
}
|
|||
|
|
const outcome = await executeCommand(command.kind);
|
|||
|
|
logger.warn(`远控命令「${label}」执行${outcome.ok ? '成功' : '失败'}:${outcome.result}`);
|
|||
|
|
await ackCommand(command.id, outcome.ok, outcome.result);
|
|||
|
|
} finally {
|
|||
|
|
inFlightCommands.delete(command.id);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** 本机二次确认对话框:默认「取消」,60 秒未操作按取消处理 */
|
|||
|
|
async function confirmCommand(label: string, note: string): Promise<boolean> {
|
|||
|
|
const answered = dialog
|
|||
|
|
.showMessageBox({
|
|||
|
|
type: 'warning',
|
|||
|
|
title: '来自管理员的远程指令',
|
|||
|
|
message: `管理员要求本机「${label}」`,
|
|||
|
|
detail: `${note ? `备注:${note}\n` : ''}确认后本机将立即${label};60 秒内未确认视为取消。`,
|
|||
|
|
buttons: ['取消', '确认执行'],
|
|||
|
|
defaultId: 0,
|
|||
|
|
cancelId: 0,
|
|||
|
|
noLink: true,
|
|||
|
|
})
|
|||
|
|
.then((result) => result.response === 1)
|
|||
|
|
.catch(() => false);
|
|||
|
|
|
|||
|
|
return Promise.race([
|
|||
|
|
answered,
|
|||
|
|
new Promise<boolean>((resolve) => setTimeout(() => resolve(false), COMMAND_CONFIRM_TIMEOUT_MS)),
|
|||
|
|
]);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** 执行系统命令:只支持 Windows(本项目客户端只发 Windows 版) */
|
|||
|
|
async function executeCommand(kind: ClientCommandKind): Promise<{ ok: boolean; result: string }> {
|
|||
|
|
if (process.platform !== 'win32') return { ok: false, result: '仅支持 Windows' };
|
|||
|
|
|
|||
|
|
const commands: Record<ClientCommandKind, { file: string; args: string[] }> = {
|
|||
|
|
shutdown: { file: 'shutdown.exe', args: ['/s', '/t', '0'] },
|
|||
|
|
restart: { file: 'shutdown.exe', args: ['/r', '/t', '0'] },
|
|||
|
|
logoff: { file: 'shutdown.exe', args: ['/l'] },
|
|||
|
|
lock: { file: 'rundll32.exe', args: ['user32.dll,LockWorkStation'] },
|
|||
|
|
};
|
|||
|
|
const plan = commands[kind];
|
|||
|
|
|
|||
|
|
try {
|
|||
|
|
// detached + unref:不能等它退出(关机/注销会把本进程一起带走)
|
|||
|
|
spawn(plan.file, plan.args, { detached: true, stdio: 'ignore', windowsHide: true }).unref();
|
|||
|
|
return { ok: true, result: '已下达系统命令' };
|
|||
|
|
} catch (error) {
|
|||
|
|
return { ok: false, result: error instanceof Error ? error.message : String(error) };
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** 回执:服务端用 body 里的 deviceKey 校验"这条命令是发给这台机器的" */
|
|||
|
|
async function ackCommand(commandId: string, ok: boolean, result: string): Promise<void> {
|
|||
|
|
const config = getConfig();
|
|||
|
|
if (!config.token) return;
|
|||
|
|
try {
|
|||
|
|
const response = await fetch(`${config.serverUrl}/api/clients/commands/${commandId}/ack`, {
|
|||
|
|
method: 'POST',
|
|||
|
|
headers: { 'content-type': 'application/json', authorization: `Bearer ${config.token}` },
|
|||
|
|
body: JSON.stringify({ deviceKey: config.deviceKey, ok, result }),
|
|||
|
|
signal: AbortSignal.timeout(HEARTBEAT_TIMEOUT_MS),
|
|||
|
|
});
|
|||
|
|
if (!response.ok) {
|
|||
|
|
logger.warn(`远控命令回执失败(HTTP ${response.status}),将在下次心跳重试`);
|
|||
|
|
unackedResults.set(commandId, { ok, result });
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
unackedResults.delete(commandId);
|
|||
|
|
logger.info(`远控命令回执已送达(${ok ? '成功' : '失败'}):${result}`);
|
|||
|
|
} catch (error) {
|
|||
|
|
logger.warn(
|
|||
|
|
`远控命令回执失败(${error instanceof Error ? error.message : String(error)}),将在下次心跳重试`,
|
|||
|
|
);
|
|||
|
|
unackedResults.set(commandId, { ok, result });
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** 响应里的更新信息:服务端指定了目标版本、且该版本确实比本机新,才交给 auto-update */
|
|||
|
|
async function handleUpdate(info: ClientUpdateInfoDto | null, targetVersion: string | null): Promise<void> {
|
|||
|
|
const target = targetVersion?.trim() ?? '';
|
|||
|
|
if (!target) return;
|
|||
|
|
if (!info) {
|
|||
|
|
// 服务端指定了目标版本但还没有这份安装包:只记一行,客户端只能提示手动更新
|
|||
|
|
logger.warn(`服务端要求升到 ${target},但服务端还没有这个版本的安装包(无法自动下载)`);
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
if (!isNewerVersion(app.getVersion(), target)) return;
|
|||
|
|
await considerUpdate(info, target);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** 启动心跳(重复调用无副作用) */
|
|||
|
|
export function startClientAgent(): void {
|
|||
|
|
if (state.running) return;
|
|||
|
|
state.running = true;
|
|||
|
|
logger.info(
|
|||
|
|
isAgentSuppressed()
|
|||
|
|
? '客户端上报代理:冒烟模式下不上报(需要时设 ELECTRON_SMOKE_CLIENT_AGENT=1)'
|
|||
|
|
: `客户端上报代理已启动:${FIRST_BEAT_DELAY_MS / 1000} 秒后首次上报,之后每 ${HEARTBEAT_INTERVAL_TEXT} 一次`,
|
|||
|
|
);
|
|||
|
|
scheduleNext(FIRST_BEAT_DELAY_MS);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** 停止心跳(退出清理调用;幂等) */
|
|||
|
|
export function stopClientAgent(): void {
|
|||
|
|
if (!state.running) return;
|
|||
|
|
state.running = false;
|
|||
|
|
clearTimer();
|
|||
|
|
logger.info('客户端上报代理已停止');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 手动触发一次上报并返回最新状态(设置页「立即上报」按钮)。
|
|||
|
|
* 返回的是**报告之后**的状态,界面直接照它刷新即可。
|
|||
|
|
*/
|
|||
|
|
export async function beatNow(): Promise<ClientAgentStatus> {
|
|||
|
|
if (!state.running) startClientAgent();
|
|||
|
|
if (isAgentSuppressed()) {
|
|||
|
|
logger.info('客户端上报:冒烟模式下跳过手动上报');
|
|||
|
|
return getClientAgentStatus();
|
|||
|
|
}
|
|||
|
|
clearTimer();
|
|||
|
|
await beat();
|
|||
|
|
return getClientAgentStatus();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/** 当前联动状态(纯数据,可直接跨 contextBridge 传给渲染进程) */
|
|||
|
|
export function getClientAgentStatus(): ClientAgentStatus {
|
|||
|
|
const config = getConfig();
|
|||
|
|
const lastAt = state.lastHeartbeatAt ? Date.parse(state.lastHeartbeatAt) : Number.NaN;
|
|||
|
|
return {
|
|||
|
|
deviceKeyTail: deviceKeyTail(config.deviceKey),
|
|||
|
|
lastHeartbeatAt: state.lastHeartbeatAt,
|
|||
|
|
lastError: state.lastError,
|
|||
|
|
pendingUpdateVersion: config.pendingUpdateVersion ?? '',
|
|||
|
|
updateTargetVersion: state.updateTargetVersion,
|
|||
|
|
autoUpdate: config.autoUpdate !== false,
|
|||
|
|
online: Number.isFinite(lastAt) && Date.now() - lastAt < ONLINE_WINDOW_MS,
|
|||
|
|
};
|
|||
|
|
}
|