mirror of
https://github.com/hicccc77/WeFlow.git
synced 2026-03-20 06:14:33 +08:00
1717 lines
58 KiB
TypeScript
1717 lines
58 KiB
TypeScript
import { app, BrowserWindow } from 'electron'
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import { basename, dirname, extname, join } from 'path'
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import { pathToFileURL } from 'url'
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import { existsSync, mkdirSync, readdirSync, readFileSync, statSync, appendFileSync } from 'fs'
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import { writeFile, rm, readdir } from 'fs/promises'
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import crypto from 'crypto'
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import { Worker } from 'worker_threads'
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import { ConfigService } from './config'
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import { wcdbService } from './wcdbService'
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// 获取 ffmpeg-static 的路径
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function getStaticFfmpegPath(): string | null {
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try {
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// 方法1: 直接 require ffmpeg-static
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// eslint-disable-next-line @typescript-eslint/no-var-requires
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const ffmpegStatic = require('ffmpeg-static')
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if (typeof ffmpegStatic === 'string' && existsSync(ffmpegStatic)) {
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return ffmpegStatic
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}
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// 方法2: 手动构建路径（开发环境）
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const devPath = join(process.cwd(), 'node_modules', 'ffmpeg-static', 'ffmpeg.exe')
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if (existsSync(devPath)) {
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return devPath
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}
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// 方法3: 打包后的路径
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if (app.isPackaged) {
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const resourcesPath = process.resourcesPath
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const packedPath = join(resourcesPath, 'app.asar.unpacked', 'node_modules', 'ffmpeg-static', 'ffmpeg.exe')
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if (existsSync(packedPath)) {
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return packedPath
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}
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}
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return null
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} catch {
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return null
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}
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}
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type DecryptResult = {
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success: boolean
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localPath?: string
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error?: string
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isThumb?: boolean // 是否是缩略图（没有高清图时返回缩略图）
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}
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type HardlinkState = {
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imageTable?: string
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dirTable?: string
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}
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export class ImageDecryptService {
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private configService = new ConfigService()
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private hardlinkCache = new Map<string, HardlinkState>()
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private resolvedCache = new Map<string, string>()
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private pending = new Map<string, Promise<DecryptResult>>()
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private readonly defaultV1AesKey = 'cfcd208495d565ef'
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private cacheIndexed = false
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private cacheIndexing: Promise<void> | null = null
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private updateFlags = new Map<string, boolean>()
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private logInfo(message: string, meta?: Record<string, unknown>): void {
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if (!this.configService.get('logEnabled')) return
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const timestamp = new Date().toISOString()
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const metaStr = meta ? ` ${JSON.stringify(meta)}` : ''
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const logLine = `[${timestamp}] [ImageDecrypt] ${message}${metaStr}\n`
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// 同时输出到控制台
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if (meta) {
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console.info(message, meta)
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} else {
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console.info(message)
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}
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// 写入日志文件
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this.writeLog(logLine)
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}
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private logError(message: string, error?: unknown, meta?: Record<string, unknown>): void {
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if (!this.configService.get('logEnabled')) return
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const timestamp = new Date().toISOString()
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const errorStr = error ? ` Error: ${String(error)}` : ''
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const metaStr = meta ? ` ${JSON.stringify(meta)}` : ''
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const logLine = `[${timestamp}] [ImageDecrypt] ERROR: ${message}${errorStr}${metaStr}\n`
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// 同时输出到控制台
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console.error(message, error, meta)
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// 写入日志文件
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this.writeLog(logLine)
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}
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private writeLog(line: string): void {
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try {
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const logDir = join(app.getPath('userData'), 'logs')
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if (!existsSync(logDir)) {
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mkdirSync(logDir, { recursive: true })
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}
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appendFileSync(join(logDir, 'wcdb.log'), line, { encoding: 'utf8' })
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} catch (err) {
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console.error('写入日志失败:', err)
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}
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}
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async resolveCachedImage(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string }): Promise<DecryptResult & { hasUpdate?: boolean }> {
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await this.ensureCacheIndexed()
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const cacheKeys = this.getCacheKeys(payload)
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const cacheKey = cacheKeys[0]
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if (!cacheKey) {
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return { success: false, error: '缺少图片标识' }
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}
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for (const key of cacheKeys) {
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const cached = this.resolvedCache.get(key)
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if (cached && existsSync(cached) && this.isImageFile(cached)) {
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this.logInfo('缓存命中(从Map)', { key, path: cached, isThumb: this.isThumbnailPath(cached) })
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const dataUrl = this.fileToDataUrl(cached)
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const isThumb = this.isThumbnailPath(cached)
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const hasUpdate = isThumb ? (this.updateFlags.get(key) ?? false) : false
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if (isThumb) {
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this.triggerUpdateCheck(payload, key, cached)
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} else {
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this.updateFlags.delete(key)
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}
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this.emitCacheResolved(payload, key, dataUrl || this.filePathToUrl(cached))
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return { success: true, localPath: dataUrl || this.filePathToUrl(cached), hasUpdate }
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}
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if (cached && !this.isImageFile(cached)) {
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this.resolvedCache.delete(key)
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}
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}
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for (const key of cacheKeys) {
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const existing = this.findCachedOutput(key, false, payload.sessionId)
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if (existing) {
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this.logInfo('缓存命中(文件系统)', { key, path: existing, isThumb: this.isThumbnailPath(existing) })
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this.cacheResolvedPaths(key, payload.imageMd5, payload.imageDatName, existing)
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const dataUrl = this.fileToDataUrl(existing)
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const isThumb = this.isThumbnailPath(existing)
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const hasUpdate = isThumb ? (this.updateFlags.get(key) ?? false) : false
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if (isThumb) {
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this.triggerUpdateCheck(payload, key, existing)
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} else {
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this.updateFlags.delete(key)
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}
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this.emitCacheResolved(payload, key, dataUrl || this.filePathToUrl(existing))
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return { success: true, localPath: dataUrl || this.filePathToUrl(existing), hasUpdate }
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}
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}
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this.logInfo('未找到缓存', { md5: payload.imageMd5, datName: payload.imageDatName })
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return { success: false, error: '未找到缓存图片' }
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}
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async decryptImage(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string; force?: boolean }): Promise<DecryptResult> {
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await this.ensureCacheIndexed()
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const cacheKey = payload.imageMd5 || payload.imageDatName
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if (!cacheKey) {
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return { success: false, error: '缺少图片标识' }
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}
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if (!payload.force) {
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const cached = this.resolvedCache.get(cacheKey)
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if (cached && existsSync(cached) && this.isImageFile(cached)) {
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const dataUrl = this.fileToDataUrl(cached)
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const localPath = dataUrl || this.filePathToUrl(cached)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath }
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}
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if (cached && !this.isImageFile(cached)) {
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this.resolvedCache.delete(cacheKey)
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}
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}
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const pending = this.pending.get(cacheKey)
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if (pending) return pending
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const task = this.decryptImageInternal(payload, cacheKey)
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this.pending.set(cacheKey, task)
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try {
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return await task
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} finally {
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this.pending.delete(cacheKey)
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}
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}
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private async decryptImageInternal(
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payload: { sessionId?: string; imageMd5?: string; imageDatName?: string; force?: boolean },
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cacheKey: string
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): Promise<DecryptResult> {
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this.logInfo('开始解密图片', { md5: payload.imageMd5, datName: payload.imageDatName, force: payload.force })
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try {
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const wxid = this.configService.get('myWxid')
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const dbPath = this.configService.get('dbPath')
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if (!wxid || !dbPath) {
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this.logError('配置缺失', undefined, { wxid: !!wxid, dbPath: !!dbPath })
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return { success: false, error: '未配置账号或数据库路径' }
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}
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const accountDir = this.resolveAccountDir(dbPath, wxid)
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if (!accountDir) {
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this.logError('未找到账号目录', undefined, { dbPath, wxid })
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return { success: false, error: '未找到账号目录' }
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}
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const datPath = await this.resolveDatPath(
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accountDir,
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payload.imageMd5,
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payload.imageDatName,
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payload.sessionId,
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{ allowThumbnail: !payload.force, skipResolvedCache: Boolean(payload.force) }
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)
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// 如果要求高清图但没找到，直接返回提示
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if (!datPath && payload.force) {
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this.logError('未找到高清图', undefined, { md5: payload.imageMd5, datName: payload.imageDatName })
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return { success: false, error: '未找到高清图，请在微信中点开该图片查看后重试' }
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}
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if (!datPath) {
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this.logError('未找到DAT文件', undefined, { md5: payload.imageMd5, datName: payload.imageDatName })
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return { success: false, error: '未找到图片文件' }
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}
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this.logInfo('找到DAT文件', { datPath })
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if (!extname(datPath).toLowerCase().includes('dat')) {
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this.cacheResolvedPaths(cacheKey, payload.imageMd5, payload.imageDatName, datPath)
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const dataUrl = this.fileToDataUrl(datPath)
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const localPath = dataUrl || this.filePathToUrl(datPath)
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const isThumb = this.isThumbnailPath(datPath)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath, isThumb }
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}
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// 查找已缓存的解密文件
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const existing = this.findCachedOutput(cacheKey, payload.force, payload.sessionId)
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if (existing) {
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this.logInfo('找到已解密文件', { existing, isHd: this.isHdPath(existing) })
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const isHd = this.isHdPath(existing)
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// 如果要求高清但找到的是缩略图，继续解密高清图
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if (!(payload.force && !isHd)) {
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this.cacheResolvedPaths(cacheKey, payload.imageMd5, payload.imageDatName, existing)
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const dataUrl = this.fileToDataUrl(existing)
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const localPath = dataUrl || this.filePathToUrl(existing)
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const isThumb = this.isThumbnailPath(existing)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath, isThumb }
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}
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}
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const xorKeyRaw = this.configService.get('imageXorKey') as unknown
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// 支持十六进制格式（如 0x53）和十进制格式
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let xorKey: number
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if (typeof xorKeyRaw === 'number') {
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xorKey = xorKeyRaw
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} else {
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const trimmed = String(xorKeyRaw ?? '').trim()
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if (trimmed.toLowerCase().startsWith('0x')) {
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xorKey = parseInt(trimmed, 16)
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} else {
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xorKey = parseInt(trimmed, 10)
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}
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}
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if (Number.isNaN(xorKey) || (!xorKey && xorKey !== 0)) {
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return { success: false, error: '未配置图片解密密钥' }
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}
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const aesKeyRaw = this.configService.get('imageAesKey')
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const aesKey = this.resolveAesKey(aesKeyRaw)
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this.logInfo('开始解密DAT文件', { datPath, xorKey, hasAesKey: !!aesKey })
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let decrypted = await this.decryptDatAuto(datPath, xorKey, aesKey)
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// 检查是否是 wxgf 格式，如果是则尝试提取真实图片数据
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const wxgfResult = await this.unwrapWxgf(decrypted)
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decrypted = wxgfResult.data
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let ext = this.detectImageExtension(decrypted)
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// 如果是 wxgf 格式且没检测到扩展名
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if (wxgfResult.isWxgf && !ext) {
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ext = '.hevc'
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}
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const finalExt = ext || '.jpg'
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const outputPath = this.getCacheOutputPathFromDat(datPath, finalExt, payload.sessionId)
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await writeFile(outputPath, decrypted)
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this.logInfo('解密成功', { outputPath, size: decrypted.length })
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// 对于 hevc 格式，返回错误提示
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if (finalExt === '.hevc') {
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return {
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success: false,
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error: '此图片为微信新格式(wxgf)，需要安装 ffmpeg 才能显示',
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isThumb: this.isThumbnailPath(datPath)
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}
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}
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const isThumb = this.isThumbnailPath(datPath)
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this.cacheResolvedPaths(cacheKey, payload.imageMd5, payload.imageDatName, outputPath)
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if (!isThumb) {
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this.clearUpdateFlags(cacheKey, payload.imageMd5, payload.imageDatName)
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}
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const dataUrl = this.bufferToDataUrl(decrypted, finalExt)
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const localPath = dataUrl || this.filePathToUrl(outputPath)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath, isThumb }
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} catch (e) {
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this.logError('解密失败', e, { md5: payload.imageMd5, datName: payload.imageDatName })
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return { success: false, error: String(e) }
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}
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}
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private resolveAccountDir(dbPath: string, wxid: string): string | null {
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const cleanedWxid = this.cleanAccountDirName(wxid)
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const normalized = dbPath.replace(/[\\/]+$/, '')
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const direct = join(normalized, cleanedWxid)
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if (existsSync(direct)) return direct
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if (this.isAccountDir(normalized)) return normalized
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try {
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const entries = readdirSync(normalized)
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const lowerWxid = cleanedWxid.toLowerCase()
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for (const entry of entries) {
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const entryPath = join(normalized, entry)
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if (!this.isDirectory(entryPath)) continue
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const lowerEntry = entry.toLowerCase()
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if (lowerEntry === lowerWxid || lowerEntry.startsWith(`${lowerWxid}_`)) {
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if (this.isAccountDir(entryPath)) return entryPath
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}
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}
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} catch { }
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return null
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}
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/**
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* 获取解密后的缓存目录（用于查找 hardlink.db）
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*/
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private getDecryptedCacheDir(wxid: string): string | null {
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const cachePath = this.configService.get('cachePath')
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if (!cachePath) return null
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const cleanedWxid = this.cleanAccountDirName(wxid)
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const cacheAccountDir = join(cachePath, cleanedWxid)
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// 检查缓存目录下是否有 hardlink.db
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if (existsSync(join(cacheAccountDir, 'hardlink.db'))) {
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return cacheAccountDir
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}
|
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if (existsSync(join(cachePath, 'hardlink.db'))) {
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return cachePath
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}
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const cacheHardlinkDir = join(cacheAccountDir, 'db_storage', 'hardlink')
|
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if (existsSync(join(cacheHardlinkDir, 'hardlink.db'))) {
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return cacheHardlinkDir
|
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}
|
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return null
|
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}
|
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private isAccountDir(dirPath: string): boolean {
|
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return (
|
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existsSync(join(dirPath, 'hardlink.db')) ||
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existsSync(join(dirPath, 'db_storage')) ||
|
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existsSync(join(dirPath, 'FileStorage', 'Image')) ||
|
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existsSync(join(dirPath, 'FileStorage', 'Image2'))
|
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)
|
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}
|
||
|
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private isDirectory(path: string): boolean {
|
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try {
|
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return statSync(path).isDirectory()
|
||
} catch {
|
||
return false
|
||
}
|
||
}
|
||
|
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private cleanAccountDirName(dirName: string): string {
|
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const trimmed = dirName.trim()
|
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if (!trimmed) return trimmed
|
||
|
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if (trimmed.toLowerCase().startsWith('wxid_')) {
|
||
const match = trimmed.match(/^(wxid_[^_]+)/i)
|
||
if (match) return match[1]
|
||
return trimmed
|
||
}
|
||
|
||
const suffixMatch = trimmed.match(/^(.+)_([a-zA-Z0-9]{4})$/)
|
||
if (suffixMatch) return suffixMatch[1]
|
||
|
||
return trimmed
|
||
}
|
||
|
||
private async resolveDatPath(
|
||
accountDir: string,
|
||
imageMd5?: string,
|
||
imageDatName?: string,
|
||
sessionId?: string,
|
||
options?: { allowThumbnail?: boolean; skipResolvedCache?: boolean }
|
||
): Promise<string | null> {
|
||
const allowThumbnail = options?.allowThumbnail ?? true
|
||
const skipResolvedCache = options?.skipResolvedCache ?? false
|
||
this.logInfo('[ImageDecrypt] resolveDatPath', {
|
||
accountDir,
|
||
imageMd5,
|
||
imageDatName,
|
||
sessionId,
|
||
allowThumbnail,
|
||
skipResolvedCache
|
||
})
|
||
|
||
// 优先通过 hardlink.db 查询
|
||
if (imageMd5) {
|
||
this.logInfo('[ImageDecrypt] hardlink lookup (md5)', { imageMd5, sessionId })
|
||
const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageMd5, sessionId)
|
||
if (hardlinkPath) {
|
||
const isThumb = this.isThumbnailPath(hardlinkPath)
|
||
if (allowThumbnail || !isThumb) {
|
||
this.logInfo('[ImageDecrypt] hardlink hit', { imageMd5, path: hardlinkPath })
|
||
this.cacheDatPath(accountDir, imageMd5, hardlinkPath)
|
||
if (imageDatName) this.cacheDatPath(accountDir, imageDatName, hardlinkPath)
|
||
return hardlinkPath
|
||
}
|
||
// hardlink 找到的是缩略图，但要求高清图，直接返回 null，不再搜索
|
||
if (!allowThumbnail && isThumb) {
|
||
return null
|
||
}
|
||
}
|
||
this.logInfo('[ImageDecrypt] hardlink miss (md5)', { imageMd5 })
|
||
if (imageDatName && this.looksLikeMd5(imageDatName) && imageDatName !== imageMd5) {
|
||
this.logInfo('[ImageDecrypt] hardlink fallback (datName)', { imageDatName, sessionId })
|
||
const fallbackPath = await this.resolveHardlinkPath(accountDir, imageDatName, sessionId)
|
||
if (fallbackPath) {
|
||
const isThumb = this.isThumbnailPath(fallbackPath)
|
||
if (allowThumbnail || !isThumb) {
|
||
this.logInfo('[ImageDecrypt] hardlink hit (datName)', { imageMd5: imageDatName, path: fallbackPath })
|
||
this.cacheDatPath(accountDir, imageDatName, fallbackPath)
|
||
return fallbackPath
|
||
}
|
||
if (!allowThumbnail && isThumb) {
|
||
return null
|
||
}
|
||
}
|
||
this.logInfo('[ImageDecrypt] hardlink miss (datName)', { imageDatName })
|
||
}
|
||
}
|
||
|
||
if (!imageMd5 && imageDatName && this.looksLikeMd5(imageDatName)) {
|
||
this.logInfo('[ImageDecrypt] hardlink lookup (datName)', { imageDatName, sessionId })
|
||
const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageDatName, sessionId)
|
||
if (hardlinkPath) {
|
||
const isThumb = this.isThumbnailPath(hardlinkPath)
|
||
if (allowThumbnail || !isThumb) {
|
||
this.logInfo('[ImageDecrypt] hardlink hit', { imageMd5: imageDatName, path: hardlinkPath })
|
||
this.cacheDatPath(accountDir, imageDatName, hardlinkPath)
|
||
return hardlinkPath
|
||
}
|
||
// hardlink 找到的是缩略图，但要求高清图，直接返回 null
|
||
if (!allowThumbnail && isThumb) {
|
||
return null
|
||
}
|
||
}
|
||
this.logInfo('[ImageDecrypt] hardlink miss (datName)', { imageDatName })
|
||
}
|
||
|
||
// 如果要求高清图但 hardlink 没找到，也不要搜索了（搜索太慢）
|
||
if (!allowThumbnail) {
|
||
return null
|
||
}
|
||
|
||
if (!imageDatName) return null
|
||
if (!skipResolvedCache) {
|
||
const cached = this.resolvedCache.get(imageDatName)
|
||
if (cached && existsSync(cached)) {
|
||
if (allowThumbnail || !this.isThumbnailPath(cached)) return cached
|
||
}
|
||
}
|
||
|
||
const datPath = await this.searchDatFile(accountDir, imageDatName, allowThumbnail)
|
||
if (datPath) {
|
||
this.logInfo('[ImageDecrypt] searchDatFile hit', { imageDatName, path: datPath })
|
||
this.resolvedCache.set(imageDatName, datPath)
|
||
this.cacheDatPath(accountDir, imageDatName, datPath)
|
||
return datPath
|
||
}
|
||
const normalized = this.normalizeDatBase(imageDatName)
|
||
if (normalized !== imageDatName.toLowerCase()) {
|
||
const normalizedPath = await this.searchDatFile(accountDir, normalized, allowThumbnail)
|
||
if (normalizedPath) {
|
||
this.logInfo('[ImageDecrypt] searchDatFile hit (normalized)', { imageDatName, normalized, path: normalizedPath })
|
||
this.resolvedCache.set(imageDatName, normalizedPath)
|
||
this.cacheDatPath(accountDir, imageDatName, normalizedPath)
|
||
return normalizedPath
|
||
}
|
||
}
|
||
this.logInfo('[ImageDecrypt] resolveDatPath miss', { imageDatName, normalized })
|
||
return null
|
||
}
|
||
|
||
private async resolveThumbnailDatPath(
|
||
accountDir: string,
|
||
imageMd5?: string,
|
||
imageDatName?: string,
|
||
sessionId?: string
|
||
): Promise<string | null> {
|
||
if (imageMd5) {
|
||
const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageMd5, sessionId)
|
||
if (hardlinkPath && this.isThumbnailPath(hardlinkPath)) return hardlinkPath
|
||
}
|
||
|
||
if (!imageMd5 && imageDatName && this.looksLikeMd5(imageDatName)) {
|
||
const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageDatName, sessionId)
|
||
if (hardlinkPath && this.isThumbnailPath(hardlinkPath)) return hardlinkPath
|
||
}
|
||
|
||
if (!imageDatName) return null
|
||
return this.searchDatFile(accountDir, imageDatName, true, true)
|
||
}
|
||
|
||
private async checkHasUpdate(
|
||
payload: { sessionId?: string; imageMd5?: string; imageDatName?: string },
|
||
cacheKey: string,
|
||
cachedPath: string
|
||
): Promise<boolean> {
|
||
if (!cachedPath || !existsSync(cachedPath)) return false
|
||
const isThumbnail = this.isThumbnailPath(cachedPath)
|
||
if (!isThumbnail) return false
|
||
const wxid = this.configService.get('myWxid')
|
||
const dbPath = this.configService.get('dbPath')
|
||
if (!wxid || !dbPath) return false
|
||
const accountDir = this.resolveAccountDir(dbPath, wxid)
|
||
if (!accountDir) return false
|
||
|
||
const quickDir = this.getCachedDatDir(accountDir, payload.imageDatName, payload.imageMd5)
|
||
if (quickDir) {
|
||
const baseName = payload.imageDatName || payload.imageMd5 || cacheKey
|
||
const candidate = this.findNonThumbnailVariantInDir(quickDir, baseName)
|
||
if (candidate) {
|
||
return true
|
||
}
|
||
}
|
||
|
||
const thumbPath = await this.resolveThumbnailDatPath(
|
||
accountDir,
|
||
payload.imageMd5,
|
||
payload.imageDatName,
|
||
payload.sessionId
|
||
)
|
||
if (thumbPath) {
|
||
const baseName = payload.imageDatName || payload.imageMd5 || cacheKey
|
||
const candidate = this.findNonThumbnailVariantInDir(dirname(thumbPath), baseName)
|
||
if (candidate) {
|
||
return true
|
||
}
|
||
const searchHit = await this.searchDatFileInDir(dirname(thumbPath), baseName, false)
|
||
if (searchHit && this.isNonThumbnailVariantDat(searchHit)) {
|
||
return true
|
||
}
|
||
}
|
||
return false
|
||
}
|
||
|
||
private triggerUpdateCheck(
|
||
payload: { sessionId?: string; imageMd5?: string; imageDatName?: string },
|
||
cacheKey: string,
|
||
cachedPath: string
|
||
): void {
|
||
if (this.updateFlags.get(cacheKey)) return
|
||
void this.checkHasUpdate(payload, cacheKey, cachedPath).then((hasUpdate) => {
|
||
if (!hasUpdate) return
|
||
this.updateFlags.set(cacheKey, true)
|
||
this.emitImageUpdate(payload, cacheKey)
|
||
}).catch(() => { })
|
||
}
|
||
|
||
private looksLikeMd5(value: string): boolean {
|
||
return /^[a-fA-F0-9]{16,32}$/.test(value)
|
||
}
|
||
|
||
private resolveHardlinkDbPath(accountDir: string): string | null {
|
||
const wxid = this.configService.get('myWxid')
|
||
const cacheDir = wxid ? this.getDecryptedCacheDir(wxid) : null
|
||
const candidates = [
|
||
join(accountDir, 'db_storage', 'hardlink', 'hardlink.db'),
|
||
join(accountDir, 'hardlink.db'),
|
||
cacheDir ? join(cacheDir, 'hardlink.db') : null
|
||
].filter(Boolean) as string[]
|
||
this.logInfo('[ImageDecrypt] hardlink db probe', { accountDir, cacheDir, candidates })
|
||
for (const candidate of candidates) {
|
||
if (existsSync(candidate)) return candidate
|
||
}
|
||
this.logInfo('[ImageDecrypt] hardlink db missing', { accountDir, cacheDir, candidates })
|
||
return null
|
||
}
|
||
|
||
private async resolveHardlinkPath(accountDir: string, md5: string, _sessionId?: string): Promise<string | null> {
|
||
try {
|
||
const hardlinkPath = this.resolveHardlinkDbPath(accountDir)
|
||
if (!hardlinkPath) {
|
||
return null
|
||
}
|
||
|
||
const ready = await this.ensureWcdbReady()
|
||
if (!ready) {
|
||
this.logInfo('[ImageDecrypt] hardlink db not ready')
|
||
return null
|
||
}
|
||
|
||
const state = await this.getHardlinkState(accountDir, hardlinkPath)
|
||
if (!state.imageTable) {
|
||
this.logInfo('[ImageDecrypt] hardlink table missing', { hardlinkPath })
|
||
return null
|
||
}
|
||
|
||
const escapedMd5 = this.escapeSqlString(md5)
|
||
const rowResult = await wcdbService.execQuery(
|
||
'media',
|
||
hardlinkPath,
|
||
`SELECT dir1, dir2, file_name FROM ${state.imageTable} WHERE lower(md5) = lower('${escapedMd5}') LIMIT 1`
|
||
)
|
||
const row = rowResult.success && rowResult.rows ? rowResult.rows[0] : null
|
||
|
||
if (!row) {
|
||
this.logInfo('[ImageDecrypt] hardlink row miss', { md5, table: state.imageTable })
|
||
return null
|
||
}
|
||
|
||
const dir1 = this.getRowValue(row, 'dir1')
|
||
const dir2 = this.getRowValue(row, 'dir2')
|
||
const fileName = this.getRowValue(row, 'file_name') ?? this.getRowValue(row, 'fileName')
|
||
if (dir1 === undefined || dir2 === undefined || !fileName) {
|
||
this.logInfo('[ImageDecrypt] hardlink row incomplete', { row })
|
||
return null
|
||
}
|
||
|
||
const lowerFileName = fileName.toLowerCase()
|
||
if (lowerFileName.endsWith('.dat')) {
|
||
const baseLower = lowerFileName.slice(0, -4)
|
||
if (!this.isLikelyImageDatBase(baseLower) && !this.looksLikeMd5(baseLower)) {
|
||
this.logInfo('[ImageDecrypt] hardlink fileName rejected', { fileName })
|
||
return null
|
||
}
|
||
}
|
||
|
||
// dir1 和 dir2 是 rowid，需要从 dir2id 表查询对应的目录名
|
||
let dir1Name: string | null = null
|
||
let dir2Name: string | null = null
|
||
|
||
if (state.dirTable) {
|
||
try {
|
||
// 通过 rowid 查询目录名
|
||
const dir1Result = await wcdbService.execQuery(
|
||
'media',
|
||
hardlinkPath,
|
||
`SELECT username FROM ${state.dirTable} WHERE rowid = ${Number(dir1)} LIMIT 1`
|
||
)
|
||
if (dir1Result.success && dir1Result.rows && dir1Result.rows.length > 0) {
|
||
const value = this.getRowValue(dir1Result.rows[0], 'username')
|
||
if (value) dir1Name = String(value)
|
||
}
|
||
|
||
const dir2Result = await wcdbService.execQuery(
|
||
'media',
|
||
hardlinkPath,
|
||
`SELECT username FROM ${state.dirTable} WHERE rowid = ${Number(dir2)} LIMIT 1`
|
||
)
|
||
if (dir2Result.success && dir2Result.rows && dir2Result.rows.length > 0) {
|
||
const value = this.getRowValue(dir2Result.rows[0], 'username')
|
||
if (value) dir2Name = String(value)
|
||
}
|
||
} catch {
|
||
// ignore
|
||
}
|
||
}
|
||
|
||
if (!dir1Name || !dir2Name) {
|
||
this.logInfo('[ImageDecrypt] hardlink dir resolve miss', { dir1, dir2, dir1Name, dir2Name })
|
||
return null
|
||
}
|
||
|
||
// 构建路径: msg/attach/{dir1Name}/{dir2Name}/Img/{fileName}
|
||
const possiblePaths = [
|
||
join(accountDir, 'msg', 'attach', dir1Name, dir2Name, 'Img', fileName),
|
||
join(accountDir, 'msg', 'attach', dir1Name, dir2Name, 'mg', fileName),
|
||
join(accountDir, 'msg', 'attach', dir1Name, dir2Name, fileName),
|
||
]
|
||
|
||
for (const fullPath of possiblePaths) {
|
||
if (existsSync(fullPath)) {
|
||
this.logInfo('[ImageDecrypt] hardlink path hit', { fullPath })
|
||
return fullPath
|
||
}
|
||
}
|
||
|
||
this.logInfo('[ImageDecrypt] hardlink path miss', { possiblePaths })
|
||
return null
|
||
} catch {
|
||
// ignore
|
||
}
|
||
return null
|
||
}
|
||
|
||
private async getHardlinkState(accountDir: string, hardlinkPath: string): Promise<HardlinkState> {
|
||
const cached = this.hardlinkCache.get(hardlinkPath)
|
||
if (cached) return cached
|
||
|
||
const imageResult = await wcdbService.execQuery(
|
||
'media',
|
||
hardlinkPath,
|
||
"SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'image_hardlink_info%' ORDER BY name DESC LIMIT 1"
|
||
)
|
||
const dirResult = await wcdbService.execQuery(
|
||
'media',
|
||
hardlinkPath,
|
||
"SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'dir2id%' LIMIT 1"
|
||
)
|
||
const imageTable = imageResult.success && imageResult.rows && imageResult.rows.length > 0
|
||
? this.getRowValue(imageResult.rows[0], 'name')
|
||
: undefined
|
||
const dirTable = dirResult.success && dirResult.rows && dirResult.rows.length > 0
|
||
? this.getRowValue(dirResult.rows[0], 'name')
|
||
: undefined
|
||
const state: HardlinkState = {
|
||
imageTable: imageTable ? String(imageTable) : undefined,
|
||
dirTable: dirTable ? String(dirTable) : undefined
|
||
}
|
||
this.logInfo('[ImageDecrypt] hardlink state', { hardlinkPath, imageTable: state.imageTable, dirTable: state.dirTable })
|
||
this.hardlinkCache.set(hardlinkPath, state)
|
||
return state
|
||
}
|
||
|
||
private async ensureWcdbReady(): Promise<boolean> {
|
||
if (wcdbService.isReady()) return true
|
||
const dbPath = this.configService.get('dbPath')
|
||
const decryptKey = this.configService.get('decryptKey')
|
||
const wxid = this.configService.get('myWxid')
|
||
if (!dbPath || !decryptKey || !wxid) return false
|
||
const cleanedWxid = this.cleanAccountDirName(wxid)
|
||
return await wcdbService.open(dbPath, decryptKey, cleanedWxid)
|
||
}
|
||
|
||
private getRowValue(row: any, column: string): any {
|
||
if (!row) return undefined
|
||
if (Object.prototype.hasOwnProperty.call(row, column)) return row[column]
|
||
const target = column.toLowerCase()
|
||
for (const key of Object.keys(row)) {
|
||
if (key.toLowerCase() === target) return row[key]
|
||
}
|
||
return undefined
|
||
}
|
||
|
||
private escapeSqlString(value: string): string {
|
||
return value.replace(/'/g, "''")
|
||
}
|
||
|
||
private async searchDatFile(
|
||
accountDir: string,
|
||
datName: string,
|
||
allowThumbnail = true,
|
||
thumbOnly = false
|
||
): Promise<string | null> {
|
||
const key = `${accountDir}|${datName}`
|
||
const cached = this.resolvedCache.get(key)
|
||
if (cached && existsSync(cached)) {
|
||
if (allowThumbnail || !this.isThumbnailPath(cached)) return cached
|
||
}
|
||
|
||
const root = join(accountDir, 'msg', 'attach')
|
||
if (!existsSync(root)) return null
|
||
const found = await this.walkForDatInWorker(root, datName.toLowerCase(), 8, allowThumbnail, thumbOnly)
|
||
if (found) {
|
||
this.resolvedCache.set(key, found)
|
||
return found
|
||
}
|
||
return null
|
||
}
|
||
|
||
private async searchDatFileInDir(
|
||
dirPath: string,
|
||
datName: string,
|
||
allowThumbnail = true
|
||
): Promise<string | null> {
|
||
if (!existsSync(dirPath)) return null
|
||
return await this.walkForDatInWorker(dirPath, datName.toLowerCase(), 3, allowThumbnail, false)
|
||
}
|
||
|
||
private async walkForDatInWorker(
|
||
root: string,
|
||
datName: string,
|
||
maxDepth = 4,
|
||
allowThumbnail = true,
|
||
thumbOnly = false
|
||
): Promise<string | null> {
|
||
const workerPath = join(__dirname, 'imageSearchWorker.js')
|
||
return await new Promise((resolve) => {
|
||
const worker = new Worker(workerPath, {
|
||
workerData: { root, datName, maxDepth, allowThumbnail, thumbOnly }
|
||
})
|
||
|
||
const cleanup = () => {
|
||
worker.removeAllListeners()
|
||
}
|
||
|
||
worker.on('message', (msg: any) => {
|
||
if (msg && msg.type === 'done') {
|
||
cleanup()
|
||
void worker.terminate()
|
||
resolve(msg.path || null)
|
||
return
|
||
}
|
||
if (msg && msg.type === 'error') {
|
||
cleanup()
|
||
void worker.terminate()
|
||
resolve(null)
|
||
}
|
||
})
|
||
|
||
worker.on('error', () => {
|
||
cleanup()
|
||
void worker.terminate()
|
||
resolve(null)
|
||
})
|
||
})
|
||
}
|
||
|
||
private matchesDatName(fileName: string, datName: string): boolean {
|
||
const lower = fileName.toLowerCase()
|
||
const base = lower.endsWith('.dat') ? lower.slice(0, -4) : lower
|
||
const normalizedBase = this.normalizeDatBase(base)
|
||
const normalizedTarget = this.normalizeDatBase(datName.toLowerCase())
|
||
if (normalizedBase === normalizedTarget) return true
|
||
const pattern = new RegExp(`^${datName}(?:[._][a-z])?\\.dat$`, 'i')
|
||
if (pattern.test(lower)) return true
|
||
return lower.endsWith('.dat') && lower.includes(datName)
|
||
}
|
||
|
||
private scoreDatName(fileName: string): number {
|
||
if (fileName.includes('.t.dat') || fileName.includes('_t.dat')) return 1
|
||
if (fileName.includes('.c.dat') || fileName.includes('_c.dat')) return 1
|
||
return 2
|
||
}
|
||
|
||
private isThumbnailDat(fileName: string): boolean {
|
||
return fileName.includes('.t.dat') || fileName.includes('_t.dat')
|
||
}
|
||
|
||
private hasXVariant(baseLower: string): boolean {
|
||
return /[._][a-z]$/.test(baseLower)
|
||
}
|
||
|
||
private isThumbnailPath(filePath: string): boolean {
|
||
const lower = basename(filePath).toLowerCase()
|
||
if (this.isThumbnailDat(lower)) return true
|
||
const ext = extname(lower)
|
||
const base = ext ? lower.slice(0, -ext.length) : lower
|
||
// 支持新命名 _thumb 和旧命名 _t
|
||
return base.endsWith('_t') || base.endsWith('_thumb')
|
||
}
|
||
|
||
private isHdPath(filePath: string): boolean {
|
||
const lower = basename(filePath).toLowerCase()
|
||
const ext = extname(lower)
|
||
const base = ext ? lower.slice(0, -ext.length) : lower
|
||
return base.endsWith('_hd') || base.endsWith('_h')
|
||
}
|
||
|
||
private hasImageVariantSuffix(baseLower: string): boolean {
|
||
return /[._][a-z]$/.test(baseLower)
|
||
}
|
||
|
||
private isLikelyImageDatBase(baseLower: string): boolean {
|
||
return this.hasImageVariantSuffix(baseLower) || this.looksLikeMd5(baseLower)
|
||
}
|
||
|
||
private normalizeDatBase(name: string): string {
|
||
let base = name.toLowerCase()
|
||
if (base.endsWith('.dat') || base.endsWith('.jpg')) {
|
||
base = base.slice(0, -4)
|
||
}
|
||
while (/[._][a-z]$/.test(base)) {
|
||
base = base.slice(0, -2)
|
||
}
|
||
return base
|
||
}
|
||
|
||
private sanitizeDirName(name: string): string {
|
||
const trimmed = name.trim()
|
||
if (!trimmed) return 'unknown'
|
||
return trimmed.replace(/[<>:"/\\|?*]/g, '_')
|
||
}
|
||
|
||
private resolveTimeDir(datPath: string): string {
|
||
const parts = datPath.split(/[\\/]+/)
|
||
for (const part of parts) {
|
||
if (/^\d{4}-\d{2}$/.test(part)) return part
|
||
}
|
||
try {
|
||
const stat = statSync(datPath)
|
||
const year = stat.mtime.getFullYear()
|
||
const month = String(stat.mtime.getMonth() + 1).padStart(2, '0')
|
||
return `${year}-${month}`
|
||
} catch {
|
||
return 'unknown-time'
|
||
}
|
||
}
|
||
|
||
private findCachedOutput(cacheKey: string, preferHd: boolean = false, sessionId?: string): string | null {
|
||
const root = this.getCacheRoot()
|
||
const normalizedKey = this.normalizeDatBase(cacheKey.toLowerCase())
|
||
const extensions = ['.jpg', '.jpeg', '.png', '.gif', '.webp']
|
||
|
||
if (sessionId) {
|
||
const sessionDir = join(root, this.sanitizeDirName(sessionId))
|
||
if (existsSync(sessionDir)) {
|
||
try {
|
||
const sessionEntries = readdirSync(sessionDir)
|
||
for (const entry of sessionEntries) {
|
||
const timeDir = join(sessionDir, entry)
|
||
if (!this.isDirectory(timeDir)) continue
|
||
const hit = this.findCachedOutputInDir(timeDir, normalizedKey, extensions, preferHd)
|
||
if (hit) return hit
|
||
}
|
||
} catch {
|
||
// ignore
|
||
}
|
||
}
|
||
}
|
||
|
||
// 新目录结构: Images/{normalizedKey}/{normalizedKey}_thumb.jpg 或 _hd.jpg
|
||
const imageDir = join(root, normalizedKey)
|
||
if (existsSync(imageDir)) {
|
||
const hit = this.findCachedOutputInDir(imageDir, normalizedKey, extensions, preferHd)
|
||
if (hit) return hit
|
||
}
|
||
|
||
// 兼容旧的平铺结构
|
||
for (const ext of extensions) {
|
||
const candidate = join(root, `${cacheKey}${ext}`)
|
||
if (existsSync(candidate)) return candidate
|
||
}
|
||
for (const ext of extensions) {
|
||
const candidate = join(root, `${cacheKey}_t${ext}`)
|
||
if (existsSync(candidate)) return candidate
|
||
}
|
||
|
||
return null
|
||
}
|
||
|
||
private findCachedOutputInDir(
|
||
dirPath: string,
|
||
normalizedKey: string,
|
||
extensions: string[],
|
||
preferHd: boolean
|
||
): string | null {
|
||
// 先检查并删除旧的 .hevc 文件（ffmpeg 转换失败时遗留的）
|
||
const hevcThumb = join(dirPath, `${normalizedKey}_thumb.hevc`)
|
||
const hevcHd = join(dirPath, `${normalizedKey}_hd.hevc`)
|
||
try {
|
||
if (existsSync(hevcThumb)) {
|
||
require('fs').unlinkSync(hevcThumb)
|
||
}
|
||
if (existsSync(hevcHd)) {
|
||
require('fs').unlinkSync(hevcHd)
|
||
}
|
||
} catch { }
|
||
|
||
for (const ext of extensions) {
|
||
if (preferHd) {
|
||
const hdPath = join(dirPath, `${normalizedKey}_hd${ext}`)
|
||
if (existsSync(hdPath)) return hdPath
|
||
}
|
||
const thumbPath = join(dirPath, `${normalizedKey}_thumb${ext}`)
|
||
if (existsSync(thumbPath)) return thumbPath
|
||
|
||
// 允许返回 _hd 格式（因为它有 _hd 变体后缀）
|
||
if (!preferHd) {
|
||
const hdPath = join(dirPath, `${normalizedKey}_hd${ext}`)
|
||
if (existsSync(hdPath)) return hdPath
|
||
}
|
||
}
|
||
return null
|
||
}
|
||
|
||
private getCacheOutputPathFromDat(datPath: string, ext: string, sessionId?: string): string {
|
||
const name = basename(datPath)
|
||
const lower = name.toLowerCase()
|
||
const base = lower.endsWith('.dat') ? name.slice(0, -4) : name
|
||
|
||
// 提取基础名称（去掉 _t, _h 等后缀）
|
||
const normalizedBase = this.normalizeDatBase(base)
|
||
|
||
// 判断是缩略图还是高清图
|
||
const isThumb = this.isThumbnailDat(lower)
|
||
const suffix = isThumb ? '_thumb' : '_hd'
|
||
|
||
const contactDir = this.sanitizeDirName(sessionId || 'unknown')
|
||
const timeDir = this.resolveTimeDir(datPath)
|
||
const outputDir = join(this.getCacheRoot(), contactDir, timeDir)
|
||
if (!existsSync(outputDir)) {
|
||
mkdirSync(outputDir, { recursive: true })
|
||
}
|
||
|
||
return join(outputDir, `${normalizedBase}${suffix}${ext}`)
|
||
}
|
||
|
||
private cacheResolvedPaths(cacheKey: string, imageMd5: string | undefined, imageDatName: string | undefined, outputPath: string): void {
|
||
this.resolvedCache.set(cacheKey, outputPath)
|
||
if (imageMd5 && imageMd5 !== cacheKey) {
|
||
this.resolvedCache.set(imageMd5, outputPath)
|
||
}
|
||
if (imageDatName && imageDatName !== cacheKey && imageDatName !== imageMd5) {
|
||
this.resolvedCache.set(imageDatName, outputPath)
|
||
}
|
||
}
|
||
|
||
private getCacheKeys(payload: { imageMd5?: string; imageDatName?: string }): string[] {
|
||
const keys: string[] = []
|
||
const addKey = (value?: string) => {
|
||
if (!value) return
|
||
const lower = value.toLowerCase()
|
||
if (!keys.includes(value)) keys.push(value)
|
||
if (!keys.includes(lower)) keys.push(lower)
|
||
const normalized = this.normalizeDatBase(lower)
|
||
if (normalized && !keys.includes(normalized)) keys.push(normalized)
|
||
}
|
||
addKey(payload.imageMd5)
|
||
if (payload.imageDatName && payload.imageDatName !== payload.imageMd5) {
|
||
addKey(payload.imageDatName)
|
||
}
|
||
return keys
|
||
}
|
||
|
||
private cacheDatPath(accountDir: string, datName: string, datPath: string): void {
|
||
const key = `${accountDir}|${datName}`
|
||
this.resolvedCache.set(key, datPath)
|
||
const normalized = this.normalizeDatBase(datName)
|
||
if (normalized && normalized !== datName.toLowerCase()) {
|
||
this.resolvedCache.set(`${accountDir}|${normalized}`, datPath)
|
||
}
|
||
}
|
||
|
||
private clearUpdateFlags(cacheKey: string, imageMd5?: string, imageDatName?: string): void {
|
||
this.updateFlags.delete(cacheKey)
|
||
if (imageMd5) this.updateFlags.delete(imageMd5)
|
||
if (imageDatName) this.updateFlags.delete(imageDatName)
|
||
}
|
||
|
||
private getCachedDatDir(accountDir: string, imageDatName?: string, imageMd5?: string): string | null {
|
||
const keys = [
|
||
imageDatName ? `${accountDir}|${imageDatName}` : null,
|
||
imageDatName ? `${accountDir}|${this.normalizeDatBase(imageDatName)}` : null,
|
||
imageMd5 ? `${accountDir}|${imageMd5}` : null
|
||
].filter(Boolean) as string[]
|
||
for (const key of keys) {
|
||
const cached = this.resolvedCache.get(key)
|
||
if (cached && existsSync(cached)) return dirname(cached)
|
||
}
|
||
return null
|
||
}
|
||
|
||
private findNonThumbnailVariantInDir(dirPath: string, baseName: string): string | null {
|
||
let entries: string[]
|
||
try {
|
||
entries = readdirSync(dirPath)
|
||
} catch {
|
||
return null
|
||
}
|
||
const target = this.normalizeDatBase(baseName.toLowerCase())
|
||
for (const entry of entries) {
|
||
const lower = entry.toLowerCase()
|
||
if (!lower.endsWith('.dat')) continue
|
||
if (this.isThumbnailDat(lower)) continue
|
||
const baseLower = lower.slice(0, -4)
|
||
// 只排除没有 _x 变体后缀的文件（允许 _hd、_h 等所有带变体的）
|
||
if (!this.hasXVariant(baseLower)) continue
|
||
if (this.normalizeDatBase(baseLower) !== target) continue
|
||
return join(dirPath, entry)
|
||
}
|
||
return null
|
||
}
|
||
|
||
private isNonThumbnailVariantDat(datPath: string): boolean {
|
||
const lower = basename(datPath).toLowerCase()
|
||
if (!lower.endsWith('.dat')) return false
|
||
if (this.isThumbnailDat(lower)) return false
|
||
const baseLower = lower.slice(0, -4)
|
||
// 只检查是否有 _x 变体后缀（允许 _hd、_h 等所有带变体的）
|
||
return this.hasXVariant(baseLower)
|
||
}
|
||
|
||
private emitImageUpdate(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string }, cacheKey: string): void {
|
||
const message = { cacheKey, imageMd5: payload.imageMd5, imageDatName: payload.imageDatName }
|
||
for (const win of BrowserWindow.getAllWindows()) {
|
||
if (!win.isDestroyed()) {
|
||
win.webContents.send('image:updateAvailable', message)
|
||
}
|
||
}
|
||
}
|
||
|
||
private emitCacheResolved(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string }, cacheKey: string, localPath: string): void {
|
||
const message = { cacheKey, imageMd5: payload.imageMd5, imageDatName: payload.imageDatName, localPath }
|
||
for (const win of BrowserWindow.getAllWindows()) {
|
||
if (!win.isDestroyed()) {
|
||
win.webContents.send('image:cacheResolved', message)
|
||
}
|
||
}
|
||
}
|
||
|
||
private async ensureCacheIndexed(): Promise<void> {
|
||
if (this.cacheIndexed) return
|
||
if (this.cacheIndexing) return this.cacheIndexing
|
||
this.cacheIndexing = new Promise((resolve) => {
|
||
const root = this.getCacheRoot()
|
||
try {
|
||
this.indexCacheDir(root, 2, 0)
|
||
} catch {
|
||
this.cacheIndexed = true
|
||
this.cacheIndexing = null
|
||
resolve()
|
||
return
|
||
}
|
||
this.cacheIndexed = true
|
||
this.cacheIndexing = null
|
||
resolve()
|
||
})
|
||
return this.cacheIndexing
|
||
}
|
||
|
||
private indexCacheDir(root: string, maxDepth: number, depth: number): void {
|
||
let entries: string[]
|
||
try {
|
||
entries = readdirSync(root)
|
||
} catch {
|
||
return
|
||
}
|
||
const extensions = ['.jpg', '.jpeg', '.png', '.gif', '.webp']
|
||
for (const entry of entries) {
|
||
const fullPath = join(root, entry)
|
||
let stat: ReturnType<typeof statSync>
|
||
try {
|
||
stat = statSync(fullPath)
|
||
} catch {
|
||
continue
|
||
}
|
||
if (stat.isDirectory()) {
|
||
if (depth < maxDepth) {
|
||
this.indexCacheDir(fullPath, maxDepth, depth + 1)
|
||
}
|
||
continue
|
||
}
|
||
if (!stat.isFile()) continue
|
||
const lower = entry.toLowerCase()
|
||
const ext = extensions.find((item) => lower.endsWith(item))
|
||
if (!ext) continue
|
||
const base = entry.slice(0, -ext.length)
|
||
this.addCacheIndex(base, fullPath)
|
||
const normalized = this.normalizeDatBase(base)
|
||
if (normalized && normalized !== base.toLowerCase()) {
|
||
this.addCacheIndex(normalized, fullPath)
|
||
}
|
||
}
|
||
}
|
||
|
||
private addCacheIndex(key: string, path: string): void {
|
||
const normalizedKey = key.toLowerCase()
|
||
const existing = this.resolvedCache.get(normalizedKey)
|
||
if (existing) {
|
||
const existingIsThumb = this.isThumbnailPath(existing)
|
||
const candidateIsThumb = this.isThumbnailPath(path)
|
||
if (!existingIsThumb && candidateIsThumb) return
|
||
}
|
||
this.resolvedCache.set(normalizedKey, path)
|
||
}
|
||
|
||
private getCacheRoot(): string {
|
||
const configured = this.configService.get('cachePath')
|
||
const root = configured
|
||
? join(configured, 'Images')
|
||
: join(app.getPath('documents'), 'WeFlow', 'Images')
|
||
if (!existsSync(root)) {
|
||
mkdirSync(root, { recursive: true })
|
||
}
|
||
return root
|
||
}
|
||
|
||
private resolveAesKey(aesKeyRaw: string): Buffer | null {
|
||
const trimmed = aesKeyRaw?.trim() ?? ''
|
||
if (!trimmed) return null
|
||
return this.asciiKey16(trimmed)
|
||
}
|
||
|
||
private async decryptDatAuto(datPath: string, xorKey: number, aesKey: Buffer | null): Promise<Buffer> {
|
||
const version = this.getDatVersion(datPath)
|
||
|
||
if (version === 0) {
|
||
return this.decryptDatV3(datPath, xorKey)
|
||
}
|
||
if (version === 1) {
|
||
const key = this.asciiKey16(this.defaultV1AesKey)
|
||
return this.decryptDatV4(datPath, xorKey, key)
|
||
}
|
||
// version === 2
|
||
if (!aesKey || aesKey.length !== 16) {
|
||
throw new Error('请到设置配置图片解密密钥')
|
||
}
|
||
return this.decryptDatV4(datPath, xorKey, aesKey)
|
||
}
|
||
|
||
private getDatVersion(inputPath: string): number {
|
||
if (!existsSync(inputPath)) {
|
||
throw new Error('文件不存在')
|
||
}
|
||
const bytes = readFileSync(inputPath)
|
||
if (bytes.length < 6) {
|
||
return 0
|
||
}
|
||
const signature = bytes.subarray(0, 6)
|
||
if (this.compareBytes(signature, Buffer.from([0x07, 0x08, 0x56, 0x31, 0x08, 0x07]))) {
|
||
return 1
|
||
}
|
||
if (this.compareBytes(signature, Buffer.from([0x07, 0x08, 0x56, 0x32, 0x08, 0x07]))) {
|
||
return 2
|
||
}
|
||
return 0
|
||
}
|
||
|
||
private decryptDatV3(inputPath: string, xorKey: number): Buffer {
|
||
const data = readFileSync(inputPath)
|
||
const out = Buffer.alloc(data.length)
|
||
for (let i = 0; i < data.length; i += 1) {
|
||
out[i] = data[i] ^ xorKey
|
||
}
|
||
return out
|
||
}
|
||
|
||
private decryptDatV4(inputPath: string, xorKey: number, aesKey: Buffer): Buffer {
|
||
const bytes = readFileSync(inputPath)
|
||
if (bytes.length < 0x0f) {
|
||
throw new Error('文件太小，无法解析')
|
||
}
|
||
|
||
const header = bytes.subarray(0, 0x0f)
|
||
const data = bytes.subarray(0x0f)
|
||
const aesSize = this.bytesToInt32(header.subarray(6, 10))
|
||
const xorSize = this.bytesToInt32(header.subarray(10, 14))
|
||
|
||
// AES 数据需要对齐到 16 字节（PKCS7 填充）
|
||
// 当 aesSize % 16 === 0 时，仍需要额外 16 字节的填充
|
||
const remainder = ((aesSize % 16) + 16) % 16
|
||
const alignedAesSize = aesSize + (16 - remainder)
|
||
|
||
if (alignedAesSize > data.length) {
|
||
throw new Error('文件格式异常：AES 数据长度超过文件实际长度')
|
||
}
|
||
|
||
const aesData = data.subarray(0, alignedAesSize)
|
||
let unpadded: Buffer = Buffer.alloc(0)
|
||
if (aesData.length > 0) {
|
||
const decipher = crypto.createDecipheriv('aes-128-ecb', aesKey, null)
|
||
decipher.setAutoPadding(false)
|
||
const decrypted = Buffer.concat([decipher.update(aesData), decipher.final()])
|
||
|
||
// 使用 PKCS7 填充移除
|
||
unpadded = this.strictRemovePadding(decrypted)
|
||
}
|
||
|
||
const remaining = data.subarray(alignedAesSize)
|
||
if (xorSize < 0 || xorSize > remaining.length) {
|
||
throw new Error('文件格式异常：XOR 数据长度不合法')
|
||
}
|
||
|
||
let rawData = Buffer.alloc(0)
|
||
let xoredData = Buffer.alloc(0)
|
||
if (xorSize > 0) {
|
||
const rawLength = remaining.length - xorSize
|
||
if (rawLength < 0) {
|
||
throw new Error('文件格式异常：原始数据长度小于XOR长度')
|
||
}
|
||
rawData = remaining.subarray(0, rawLength)
|
||
const xorData = remaining.subarray(rawLength)
|
||
xoredData = Buffer.alloc(xorData.length)
|
||
for (let i = 0; i < xorData.length; i += 1) {
|
||
xoredData[i] = xorData[i] ^ xorKey
|
||
}
|
||
} else {
|
||
rawData = remaining
|
||
xoredData = Buffer.alloc(0)
|
||
}
|
||
|
||
return Buffer.concat([unpadded, rawData, xoredData])
|
||
}
|
||
|
||
private bytesToInt32(bytes: Buffer): number {
|
||
if (bytes.length !== 4) {
|
||
throw new Error('需要4个字节')
|
||
}
|
||
return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24)
|
||
}
|
||
|
||
asciiKey16(keyString: string): Buffer {
|
||
if (keyString.length < 16) {
|
||
throw new Error('AES密钥至少需要16个字符')
|
||
}
|
||
return Buffer.from(keyString, 'ascii').subarray(0, 16)
|
||
}
|
||
|
||
private strictRemovePadding(data: Buffer): Buffer {
|
||
if (!data.length) {
|
||
throw new Error('解密结果为空，填充非法')
|
||
}
|
||
const paddingLength = data[data.length - 1]
|
||
if (paddingLength === 0 || paddingLength > 16 || paddingLength > data.length) {
|
||
throw new Error('PKCS7 填充长度非法')
|
||
}
|
||
for (let i = data.length - paddingLength; i < data.length; i += 1) {
|
||
if (data[i] !== paddingLength) {
|
||
throw new Error('PKCS7 填充内容非法')
|
||
}
|
||
}
|
||
return data.subarray(0, data.length - paddingLength)
|
||
}
|
||
|
||
private detectImageExtension(buffer: Buffer): string | null {
|
||
if (buffer.length < 12) return null
|
||
if (buffer[0] === 0x47 && buffer[1] === 0x49 && buffer[2] === 0x46) return '.gif'
|
||
if (buffer[0] === 0x89 && buffer[1] === 0x50 && buffer[2] === 0x4e && buffer[3] === 0x47) return '.png'
|
||
if (buffer[0] === 0xff && buffer[1] === 0xd8 && buffer[2] === 0xff) return '.jpg'
|
||
if (buffer[0] === 0x52 && buffer[1] === 0x49 && buffer[2] === 0x46 && buffer[3] === 0x46 &&
|
||
buffer[8] === 0x57 && buffer[9] === 0x45 && buffer[10] === 0x42 && buffer[11] === 0x50) {
|
||
return '.webp'
|
||
}
|
||
return null
|
||
}
|
||
|
||
private bufferToDataUrl(buffer: Buffer, ext: string): string | null {
|
||
const mimeType = this.mimeFromExtension(ext)
|
||
if (!mimeType) return null
|
||
return `data:${mimeType};base64,${buffer.toString('base64')}`
|
||
}
|
||
|
||
private fileToDataUrl(filePath: string): string | null {
|
||
try {
|
||
const ext = extname(filePath).toLowerCase()
|
||
const mimeType = this.mimeFromExtension(ext)
|
||
if (!mimeType) return null
|
||
const data = readFileSync(filePath)
|
||
return `data:${mimeType};base64,${data.toString('base64')}`
|
||
} catch {
|
||
return null
|
||
}
|
||
}
|
||
|
||
private mimeFromExtension(ext: string): string | null {
|
||
switch (ext.toLowerCase()) {
|
||
case '.gif':
|
||
return 'image/gif'
|
||
case '.png':
|
||
return 'image/png'
|
||
case '.jpg':
|
||
case '.jpeg':
|
||
return 'image/jpeg'
|
||
case '.webp':
|
||
return 'image/webp'
|
||
default:
|
||
return null
|
||
}
|
||
}
|
||
|
||
private filePathToUrl(filePath: string): string {
|
||
const url = pathToFileURL(filePath).toString()
|
||
try {
|
||
const mtime = statSync(filePath).mtimeMs
|
||
return `${url}?v=${Math.floor(mtime)}`
|
||
} catch {
|
||
return url
|
||
}
|
||
}
|
||
|
||
private isImageFile(filePath: string): boolean {
|
||
const ext = extname(filePath).toLowerCase()
|
||
return ext === '.gif' || ext === '.png' || ext === '.jpg' || ext === '.jpeg' || ext === '.webp'
|
||
}
|
||
|
||
private compareBytes(a: Buffer, b: Buffer): boolean {
|
||
if (a.length !== b.length) return false
|
||
for (let i = 0; i < a.length; i += 1) {
|
||
if (a[i] !== b[i]) return false
|
||
}
|
||
return true
|
||
}
|
||
|
||
// 保留原有的批量检测 XOR 密钥方法（用于兼容）
|
||
async batchDetectXorKey(dirPath: string, maxFiles: number = 100): Promise<number | null> {
|
||
const keyCount: Map<number, number> = new Map()
|
||
let filesChecked = 0
|
||
|
||
const V1_SIGNATURE = Buffer.from([0x07, 0x08, 0x56, 0x31, 0x08, 0x07])
|
||
const V2_SIGNATURE = Buffer.from([0x07, 0x08, 0x56, 0x32, 0x08, 0x07])
|
||
const IMAGE_SIGNATURES: { [key: string]: Buffer } = {
|
||
jpg: Buffer.from([0xFF, 0xD8, 0xFF]),
|
||
png: Buffer.from([0x89, 0x50, 0x4E, 0x47]),
|
||
gif: Buffer.from([0x47, 0x49, 0x46, 0x38]),
|
||
bmp: Buffer.from([0x42, 0x4D]),
|
||
webp: Buffer.from([0x52, 0x49, 0x46, 0x46])
|
||
}
|
||
|
||
const detectXorKeyFromV3 = (header: Buffer): number | null => {
|
||
for (const [, signature] of Object.entries(IMAGE_SIGNATURES)) {
|
||
const xorKey = header[0] ^ signature[0]
|
||
let valid = true
|
||
for (let i = 0; i < signature.length && i < header.length; i++) {
|
||
if ((header[i] ^ xorKey) !== signature[i]) {
|
||
valid = false
|
||
break
|
||
}
|
||
}
|
||
if (valid) return xorKey
|
||
}
|
||
return null
|
||
}
|
||
|
||
const scanDir = (dir: string) => {
|
||
if (filesChecked >= maxFiles) return
|
||
try {
|
||
const entries = readdirSync(dir, { withFileTypes: true })
|
||
for (const entry of entries) {
|
||
if (filesChecked >= maxFiles) return
|
||
const fullPath = join(dir, entry.name)
|
||
if (entry.isDirectory()) {
|
||
scanDir(fullPath)
|
||
} else if (entry.name.endsWith('.dat')) {
|
||
try {
|
||
const header = Buffer.alloc(16)
|
||
const fd = require('fs').openSync(fullPath, 'r')
|
||
require('fs').readSync(fd, header, 0, 16, 0)
|
||
require('fs').closeSync(fd)
|
||
|
||
if (header.subarray(0, 6).equals(V1_SIGNATURE) || header.subarray(0, 6).equals(V2_SIGNATURE)) {
|
||
continue
|
||
}
|
||
|
||
const key = detectXorKeyFromV3(header)
|
||
if (key !== null) {
|
||
keyCount.set(key, (keyCount.get(key) || 0) + 1)
|
||
filesChecked++
|
||
}
|
||
} catch { }
|
||
}
|
||
}
|
||
} catch { }
|
||
}
|
||
|
||
scanDir(dirPath)
|
||
|
||
if (keyCount.size === 0) return null
|
||
|
||
let maxCount = 0
|
||
let mostCommonKey: number | null = null
|
||
keyCount.forEach((count, key) => {
|
||
if (count > maxCount) {
|
||
maxCount = count
|
||
mostCommonKey = key
|
||
}
|
||
})
|
||
|
||
return mostCommonKey
|
||
}
|
||
|
||
/**
|
||
* 解包 wxgf 格式
|
||
* wxgf 是微信的图片格式，内部使用 HEVC 编码
|
||
*/
|
||
private async unwrapWxgf(buffer: Buffer): Promise<{ data: Buffer; isWxgf: boolean }> {
|
||
// 检查是否是 wxgf 格式 (77 78 67 66 = "wxgf")
|
||
if (buffer.length < 20 ||
|
||
buffer[0] !== 0x77 || buffer[1] !== 0x78 ||
|
||
buffer[2] !== 0x67 || buffer[3] !== 0x66) {
|
||
return { data: buffer, isWxgf: false }
|
||
}
|
||
|
||
// 先尝试搜索内嵌的传统图片签名
|
||
for (let i = 4; i < Math.min(buffer.length - 12, 4096); i++) {
|
||
if (buffer[i] === 0xff && buffer[i + 1] === 0xd8 && buffer[i + 2] === 0xff) {
|
||
return { data: buffer.subarray(i), isWxgf: false }
|
||
}
|
||
if (buffer[i] === 0x89 && buffer[i + 1] === 0x50 &&
|
||
buffer[i + 2] === 0x4e && buffer[i + 3] === 0x47) {
|
||
return { data: buffer.subarray(i), isWxgf: false }
|
||
}
|
||
}
|
||
|
||
// 提取 HEVC NALU 裸流
|
||
const hevcData = this.extractHevcNalu(buffer)
|
||
if (!hevcData || hevcData.length < 100) {
|
||
return { data: buffer, isWxgf: true }
|
||
}
|
||
|
||
// 尝试用 ffmpeg 转换
|
||
try {
|
||
const jpgData = await this.convertHevcToJpg(hevcData)
|
||
if (jpgData && jpgData.length > 0) {
|
||
return { data: jpgData, isWxgf: false }
|
||
}
|
||
} catch {
|
||
// ffmpeg 转换失败
|
||
}
|
||
|
||
return { data: hevcData, isWxgf: true }
|
||
}
|
||
|
||
/**
|
||
* 从 wxgf 数据中提取 HEVC NALU 裸流
|
||
*/
|
||
private extractHevcNalu(buffer: Buffer): Buffer | null {
|
||
const nalUnits: Buffer[] = []
|
||
let i = 4
|
||
|
||
while (i < buffer.length - 4) {
|
||
if (buffer[i] === 0x00 && buffer[i + 1] === 0x00 &&
|
||
buffer[i + 2] === 0x00 && buffer[i + 3] === 0x01) {
|
||
let nalStart = i
|
||
let nalEnd = buffer.length
|
||
|
||
for (let j = i + 4; j < buffer.length - 3; j++) {
|
||
if (buffer[j] === 0x00 && buffer[j + 1] === 0x00) {
|
||
if (buffer[j + 2] === 0x01 ||
|
||
(buffer[j + 2] === 0x00 && j + 3 < buffer.length && buffer[j + 3] === 0x01)) {
|
||
nalEnd = j
|
||
break
|
||
}
|
||
}
|
||
}
|
||
|
||
const nalUnit = buffer.subarray(nalStart, nalEnd)
|
||
if (nalUnit.length > 3) {
|
||
nalUnits.push(nalUnit)
|
||
}
|
||
i = nalEnd
|
||
} else {
|
||
i++
|
||
}
|
||
}
|
||
|
||
if (nalUnits.length === 0) {
|
||
for (let j = 4; j < buffer.length - 4; j++) {
|
||
if (buffer[j] === 0x00 && buffer[j + 1] === 0x00 &&
|
||
buffer[j + 2] === 0x00 && buffer[j + 3] === 0x01) {
|
||
return buffer.subarray(j)
|
||
}
|
||
}
|
||
return null
|
||
}
|
||
|
||
return Buffer.concat(nalUnits)
|
||
}
|
||
|
||
/**
|
||
* 获取 ffmpeg 可执行文件路径
|
||
*/
|
||
private getFfmpegPath(): string {
|
||
const staticPath = getStaticFfmpegPath()
|
||
this.logInfo('ffmpeg 路径检测', { staticPath, exists: staticPath ? existsSync(staticPath) : false })
|
||
|
||
if (staticPath) {
|
||
return staticPath
|
||
}
|
||
|
||
// 回退到系统 ffmpeg
|
||
return 'ffmpeg'
|
||
}
|
||
|
||
/**
|
||
* 使用 ffmpeg 将 HEVC 裸流转换为 JPG
|
||
*/
|
||
private convertHevcToJpg(hevcData: Buffer): Promise<Buffer | null> {
|
||
const ffmpeg = this.getFfmpegPath()
|
||
this.logInfo('ffmpeg 转换开始', { ffmpegPath: ffmpeg, hevcSize: hevcData.length })
|
||
|
||
return new Promise((resolve) => {
|
||
const { spawn } = require('child_process')
|
||
const chunks: Buffer[] = []
|
||
const errChunks: Buffer[] = []
|
||
|
||
const proc = spawn(ffmpeg, [
|
||
'-hide_banner',
|
||
'-loglevel', 'error',
|
||
'-f', 'hevc',
|
||
'-i', 'pipe:0',
|
||
'-vframes', '1',
|
||
'-q:v', '3',
|
||
'-f', 'mjpeg',
|
||
'pipe:1'
|
||
], {
|
||
stdio: ['pipe', 'pipe', 'pipe'],
|
||
windowsHide: true
|
||
})
|
||
|
||
proc.stdout.on('data', (chunk: Buffer) => chunks.push(chunk))
|
||
proc.stderr.on('data', (chunk: Buffer) => errChunks.push(chunk))
|
||
|
||
proc.on('close', (code: number) => {
|
||
if (code === 0 && chunks.length > 0) {
|
||
this.logInfo('ffmpeg 转换成功', { outputSize: Buffer.concat(chunks).length })
|
||
resolve(Buffer.concat(chunks))
|
||
} else {
|
||
const errMsg = Buffer.concat(errChunks).toString()
|
||
this.logInfo('ffmpeg 转换失败', { code, error: errMsg })
|
||
resolve(null)
|
||
}
|
||
})
|
||
|
||
proc.on('error', (err: Error) => {
|
||
this.logInfo('ffmpeg 进程错误', { error: err.message })
|
||
resolve(null)
|
||
})
|
||
|
||
proc.stdin.write(hevcData)
|
||
proc.stdin.end()
|
||
})
|
||
}
|
||
|
||
// 保留原有的解密到文件方法（用于兼容）
|
||
async decryptToFile(inputPath: string, outputPath: string, xorKey: number, aesKey?: Buffer): Promise<void> {
|
||
const version = this.getDatVersion(inputPath)
|
||
let decrypted: Buffer
|
||
|
||
if (version === 0) {
|
||
decrypted = this.decryptDatV3(inputPath, xorKey)
|
||
} else if (version === 1) {
|
||
const key = this.asciiKey16(this.defaultV1AesKey)
|
||
decrypted = this.decryptDatV4(inputPath, xorKey, key)
|
||
} else {
|
||
if (!aesKey || aesKey.length !== 16) {
|
||
throw new Error('V4版本需要16字节AES密钥')
|
||
}
|
||
decrypted = this.decryptDatV4(inputPath, xorKey, aesKey)
|
||
}
|
||
|
||
const outputDir = dirname(outputPath)
|
||
if (!existsSync(outputDir)) {
|
||
mkdirSync(outputDir, { recursive: true })
|
||
}
|
||
|
||
await writeFile(outputPath, decrypted)
|
||
}
|
||
|
||
async clearCache(): Promise<{ success: boolean; error?: string }> {
|
||
this.resolvedCache.clear()
|
||
this.hardlinkCache.clear()
|
||
this.pending.clear()
|
||
this.updateFlags.clear()
|
||
this.cacheIndexed = false
|
||
this.cacheIndexing = null
|
||
|
||
const configured = this.configService.get('cachePath')
|
||
const root = configured
|
||
? join(configured, 'Images')
|
||
: join(app.getPath('documents'), 'WeFlow', 'Images')
|
||
|
||
try {
|
||
if (!existsSync(root)) {
|
||
return { success: true }
|
||
}
|
||
const monthPattern = /^\d{4}-\d{2}$/
|
||
const clearFilesInDir = async (dirPath: string): Promise<void> => {
|
||
let entries: Array<{ name: string; isDirectory: () => boolean }>
|
||
try {
|
||
entries = await readdir(dirPath, { withFileTypes: true })
|
||
} catch {
|
||
return
|
||
}
|
||
for (const entry of entries) {
|
||
const fullPath = join(dirPath, entry.name)
|
||
if (entry.isDirectory()) {
|
||
await clearFilesInDir(fullPath)
|
||
continue
|
||
}
|
||
try {
|
||
await rm(fullPath, { force: true })
|
||
} catch { }
|
||
}
|
||
}
|
||
const traverse = async (dirPath: string): Promise<void> => {
|
||
let entries: Array<{ name: string; isDirectory: () => boolean }>
|
||
try {
|
||
entries = await readdir(dirPath, { withFileTypes: true })
|
||
} catch {
|
||
return
|
||
}
|
||
for (const entry of entries) {
|
||
const fullPath = join(dirPath, entry.name)
|
||
if (entry.isDirectory()) {
|
||
if (monthPattern.test(entry.name)) {
|
||
await clearFilesInDir(fullPath)
|
||
} else {
|
||
await traverse(fullPath)
|
||
}
|
||
continue
|
||
}
|
||
try {
|
||
await rm(fullPath, { force: true })
|
||
} catch { }
|
||
}
|
||
}
|
||
await traverse(root)
|
||
return { success: true }
|
||
} catch (e) {
|
||
return { success: false, error: String(e) }
|
||
}
|
||
}
|
||
}
|
||
|
||
export const imageDecryptService = new ImageDecryptService()
|