下面是一组“在线预览”方向的在线工具生成型 AI 提示词（Prompts）。每条 Prompt 都要求 AI 直接产出可运行的完整项目：包含源码、文件结构、运行命令、部署说明与测试/QA 清单，适合用于企业内网文档预览、权限分享、水印审计与访问日志留存等场景。
多格式文档在线预览网关（PDF/DOCX/PPTX/XLSX/图片/文本）
目标是做一个统一入口的预览网关：上传或给链接，就能在浏览器内预览，并且支持在本地/内网部署。
英文 Prompt:
You are a senior full-stack engineer. Build a production-ready "Document Preview Gateway" web app.
Tech stack requirements:
- Frontend: Next.js (App Router) + Type + Tailwind.
- Backend: Node.js (Express) OR Next.js Route Handlers.
- Conversion/preview pipeline: use LibreOffice headless for office->pdf conversion, and PDF.js for PDF rendering.
- Storage: local disk by default, optional S3-compatible storage behind an interface.
Functional requirements:
- Upload files (PDF, DOCX, PPTX, XLSX, TXT, MD, PNG/JPG/WebP) and preview in browser.
- For office formats, convert to PDF server-side; show conversion status and errors.
- Generate safe preview URLs with short-lived tokens.
- Show file data (size, mime, pages when applicable).
- Strict security: sanitize file names, validate mime/signature, limit file size, rate limit, virus-scan hook (stub).
Deliverables (must output all):
1) Complete source code with a clear file tree.
2) Step-by-step local run commands.
3) Dockerfile + docker-compose.yml (include LibreOffice dependencies).
4) Deployment guide for Linux VPS and for internal network.
5) At least 8 test cases (unit/integration) OR a QA checklist with >= 10 items.
Provide the exact file structure first, then the code for each file.
中文释义:
让 AI 生成一个可部署的“文档预览网关”项目：多格式上传与预览，Office 文件自动转 PDF，带令牌访问、状态提示与安全校验，并且给出 Docker 部署与测试/QA 清单。
预览链接权限分享（一次性口令/过期时间/访问次数）
用于把预览链接安全地发给同事/客户：支持一次性口令、到期自动失效、限制访问次数。
英文 Prompt:
Build an "Expiring Share " module and integrate it into the Document Preview Gateway.
Requirements:
- Share s support: expiresAt, maxViews, optional one-time passcode.
- Server enforces: token signature (HMAC), view counting (atomic), lock when exceeded.
- Admin UI page to create/revoke share s and see current counters.
- Auditable events: share_created, share_viewed, share_revoked, share_expired.
Implementation constraints:
- Use SQLite for local dev (Prisma or better-sqlite3), and provide a migration story.
- Provide API routes + UI pages.
Deliverables:
- Full code changes (file tree and code).
- Migration s.
- Tests: at least 6 cases covering expiry, maxViews, passcode, revocation.
- Security notes: common pitfalls and how you mitigated them.
中文释义:
让 AI 产出一个可落地的“预览分享链接权限系统”：可设过期、限制次数、可选口令，并带事件审计与测试用例。
可验证水印与泄露追踪（动态水印/用户标识/时间戳）
在预览层做动态水印：屏幕截图也能追踪泄露来源；同时避免“水印被轻易去掉”。
英文 Prompt:
Implement "Dynamic Watermark" overlay for document previews.
Requirements:
- Watermark content: userId/email (or share Id), current timestamp, client IP (server-provided), and a short hash.
- Watermark rendered as a repeating diagonal pattern over the preview area.
- Watermark settings per share : enabled/disabled, opacity, density, rotation.
- Must work for PDF.js rendering and image preview.
Deliverables:
- Complete code.
- Explain how you prevent easy removal (e.g., canvas overlay + randomized offsets per session).
- Provide QA checklist (>= 8 items), including screenshot/print attempts.
中文释义:
让 AI 生成“动态水印”功能：在 PDF.js 与图片预览上叠加可追踪的水印，并提供配置与 QA 自检点，适合敏感文档外发。
访问审计与可检索日志（按文件/用户/时间筛选导出）
把预览行为做成可查询的审计日志：谁在什么时候看了哪个文件、看了几页、是否下载过。
英文 Prompt:
Add an "Audit Log" subsystem.
Requirements:
- Log events: preview_open, page_view, download_attempt, share_view, auth_fail.
- Store: user/session identifiers, share Id, fileId, timestamp, userAgent, ip.
- UI: searchable table with filters (date range, fileId, userId/share Id, eventType) + CSV export.
- Privacy: allow masking IP and userAgent in export via config.
Deliverables:
- DB schema + migrations.
- API endpoints + UI page.
- Provide at least 5 integration tests and a load note (how to handle high volume).
中文释义:
让 AI 生成“访问审计系统”：记录预览/翻页/下载尝试等事件，提供筛选与导出，并兼顾隐私脱敏与高并发扩展思路。
大文件与分页预览性能优化（切片、缓存与断点续传）
面向 100MB+ 文档：需要更稳定的上传、缓存与预览体验，避免一次性加载导致卡顿。
英文 Prompt:
Optimize for large files.
Requirements:
- Resumable upload (tus protocol or chunked upload) with server-side assembly.
- Cache converted PDFs and generated page thumbnails (derived from existing pages) with TTL.
- Streaming download for PDF bytes; support Range requests.
- Observability: structured logs + basic metrics endpoint.
Deliverables:
- Complete implementation code.
- Docker-compose remains working.
- QA checklist >= 10 items focusing on large file behavior and Range requests.
中文释义:
让 AI 生成“大文件预览优化”方案：分片上传、缓存、Range 流式传输与可观测性，保证内网部署也能稳。
安全沙箱与文件处理隔离（队列、超时与资源限制）
把转换/解析放到隔离进程里：防止恶意文件拖垮主服务，并可限制 CPU/内存/超时。
英文 Prompt:
Design a "Conversion Worker" isolated service.
Requirements:
- Main app enqueues conversion jobs (office->pdf) into a queue (BullMQ + Redis or a simple SQLite queue).
- Worker runs conversions with timeouts and resource limits; returns artifacts and status.
- UI shows job status and retries.
- Security: run worker with non-root user; document container hardening steps.
Deliverables:
- Architecture diagram (ASCII ok).
- Full code for main app + worker.
- docker-compose with Redis (if used).
- Tests/QA: at least 8 items.
中文释义:
让 AI 输出“转换工作进程”的可运行方案：队列化、超时与资源限制、状态可视化，并给出容器安全建议。
可插拔预览适配器（新格式快速接入）
把预览能力做成适配器：未来要加 CAD、Epub 或更多格式时，只需新增一个适配器模块。
英文 Prompt:
Implement a plugin-style "Preview Adapter" system.
Requirements:
- Define interfaces: canHandle(mime, ext), prepare(file), renderStrategy().
- Built-in adapters: pdf, image, text/markdown (render sanitized HTML), office (convert then pdf).
- Add a developer doc explaining how to add a new adapter.
Deliverables:
- Refactor code to use adapters.
- Provide an example "epub" adapter stub (no need for full epub support, but show structure).
- QA checklist >= 8.
中文释义:
让 AI 把预览系统重构成“适配器插件架构”：内置 PDF/图片/文本/Markdown/Office，给出新增适配器的开发文档与示例。
企业内网部署与反向代理（HTTPS、鉴权、路径前缀）
强调可部署性：支持反向代理、路径前缀、HTTPS 与企业 SSO/基础鉴权接入点。
英文 Prompt:
Write a deployment-focused iteration.
Requirements:
- Provide Nginx reverse proxy config examples (path prefix, static caching, websocket if needed).
- Add optional auth middleware: Basic Auth and an SSO stub (OIDC placeholder).
- Ensure the app works under a Path (e.g., /preview) and behind HTTPS.
Deliverables:
- Updated code + config samples.
- A checklist for production readiness (>= 12 items), including backups, log retention, and monitoring.
中文释义:
让 AI 输出“企业内网可交付”的部署迭代：反代配置、HTTPS、鉴权与 Path 兼容，并给出上线检查清单。
