commit c082a30d62271083445c7fd72dada56cbd9b88ba Author: feie9456 Date: Sat Sep 13 13:02:17 2025 +0800 init commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a14702c --- /dev/null +++ b/.gitignore @@ -0,0 +1,34 @@ +# dependencies (bun install) +node_modules + +# output +out +dist +*.tgz + +# code coverage +coverage +*.lcov + +# logs +logs +_.log +report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json + +# dotenv environment variable files +.env +.env.development.local +.env.test.local +.env.production.local +.env.local + +# caches +.eslintcache +.cache +*.tsbuildinfo + +# IntelliJ based IDEs +.idea + +# Finder (MacOS) folder config +.DS_Store diff --git a/README.md b/README.md new file mode 100644 index 0000000..75c816a --- /dev/null +++ b/README.md @@ -0,0 +1,65 @@ +# circuit-virtual-lab-server + +基于 Express + Prisma + PostgreSQL 的“虚拟电路实验室”后端，支持用户系统与“模型广场”。依赖管理使用 Bun。 + +## 主要技术 +- Bun（运行与依赖管理） +- Express（HTTP API） +- Prisma（ORM） + PostgreSQL（数据库） +- Basic Auth（基础认证） + +## 环境 +在项目根目录创建 `.env`（示例已提供）并设置： + +``` +DATABASE_URL="postgresql://user:pass@host:5432/dbname" +PORT=3000 +``` + +## 安装与数据库 + +```bash +bun install +bun run prisma:generate +bun run prisma:migrate -- --name init +bun run db:seed +``` + +## 运行 + +```bash +bun run dev +# 或 +bun run start +``` + +访问 `GET /health` 检查存活。 + +## 认证 +所有需要认证的接口采用 Basic Auth。构造 `Authorization: Basic base64(username:password)`。 +示例种子创建了用户：`admin/admin123`。 + +## API 概览 + +用户 +- POST `/api/users/register`，注册 { username, password } +- GET `/api/users/me`，获取当前用户（需认证） +- PUT `/api/users/me`，更新资料（可含 avatarBase64、avatarMime，需认证） +- GET `/api/users/:id/avatar`，获取头像二进制 + +模型广场 +- POST `/api/models`，创建模型（需认证） +- PUT `/api/models/:id`，更新模型（需认证且需作者） +- DELETE `/api/models/:id`，删除模型（需认证且需作者） +- GET `/api/models/:id`，模型详情 +- GET `/api/models`，列表，支持 query：q、authorId、page、pageSize、sort=new|old +- GET `/api/models/:id/model.json`，下载模型 JSON +- GET `/api/models/:id/preview`，获取预览图 + +字段说明 +- 模型：title、authorId、desc（markdown）、model（JSON）、preview（二进制） +- 用户：username、password（哈希）、avatar（二进制） + +## 注意 +- 不使用本地文件持久化，所有数据保存在 PostgreSQL。 +- 预览图与头像以二进制保存在表中，并带 `*Mime` 字段标注类型。 diff --git a/bun.lock b/bun.lock new file mode 100644 index 0000000..50d9e86 --- /dev/null +++ b/bun.lock @@ -0,0 +1,352 @@ +{ + "lockfileVersion": 1, + "workspaces": { + "": { + "name": "circuit-virtual-lab-server", + "dependencies": { + "@prisma/client": "^6.16.1", + "bcryptjs": "^3.0.2", + "cors": "^2.8.5", + "dotenv": "^17.2.2", + "express": "^5.1.0", + "helmet": "^8.1.0", + "morgan": "^1.10.1", + "pino": "^9.9.5", + "pino-pretty": "^13.1.1", + "prisma": "^6.16.1", + "zod": "^4.1.8", + }, + "devDependencies": { + "@types/bcryptjs": "^3.0.0", + "@types/bun": "latest", + "@types/cors": "^2.8.19", + "@types/express": "^5.0.3", + "@types/morgan": "^1.9.10", + }, + "peerDependencies": { + "typescript": "^5", + }, + }, + }, + "packages": { + "@prisma/client": ["@prisma/client@6.16.1", "", { "peerDependencies": { 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"dependencies": { + "@prisma/client": "^6.16.1", + "bcryptjs": "^3.0.2", + "cors": "^2.8.5", + "dotenv": "^17.2.2", + "express": "^5.1.0", + "helmet": "^8.1.0", + "morgan": "^1.10.1", + "pino": "^9.9.5", + "pino-pretty": "^13.1.1", + "prisma": "^6.16.1", + "zod": "^4.1.8" + }, + "prisma": { + "seed": "bun prisma/seed.ts" + }, + "scripts": { + "dev": "bun --hot index.ts", + "start": "bun index.ts", + "prisma:generate": "prisma generate", + "prisma:migrate": "prisma migrate dev", + "prisma:studio": "prisma studio", + "db:seed": "prisma db seed" + } +} diff --git a/prisma/migrations/20250913033013_init/migration.sql b/prisma/migrations/20250913033013_init/migration.sql new file mode 100644 index 0000000..81cf4ae --- /dev/null +++ b/prisma/migrations/20250913033013_init/migration.sql @@ -0,0 +1,39 @@ +-- CreateTable +CREATE TABLE "public"."User" ( + "id" TEXT NOT NULL, + "username" TEXT NOT NULL, + "password" TEXT NOT NULL, + "avatar" BYTEA, + "avatarMime" TEXT, + "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP, + "updatedAt" TIMESTAMP(3) NOT NULL, + + CONSTRAINT "User_pkey" PRIMARY KEY ("id") +); + +-- CreateTable +CREATE TABLE "public"."CircuitModel" ( + "id" TEXT NOT NULL, + "title" TEXT NOT NULL, + "authorId" TEXT NOT NULL, + "desc" TEXT NOT NULL, + "model" JSONB NOT NULL, + "preview" BYTEA, + "previewMime" TEXT, + "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP, + "updatedAt" TIMESTAMP(3) NOT NULL, + + CONSTRAINT "CircuitModel_pkey" PRIMARY KEY ("id") +); + +-- CreateIndex +CREATE UNIQUE INDEX "User_username_key" ON "public"."User"("username"); + +-- CreateIndex +CREATE INDEX "CircuitModel_authorId_idx" ON "public"."CircuitModel"("authorId"); + +-- CreateIndex +CREATE INDEX "CircuitModel_createdAt_idx" ON "public"."CircuitModel"("createdAt"); + +-- AddForeignKey +ALTER TABLE "public"."CircuitModel" ADD CONSTRAINT "CircuitModel_authorId_fkey" FOREIGN KEY ("authorId") REFERENCES "public"."User"("id") ON DELETE CASCADE ON UPDATE CASCADE; diff --git a/prisma/migrations/migration_lock.toml b/prisma/migrations/migration_lock.toml new file mode 100644 index 0000000..044d57c --- /dev/null +++ b/prisma/migrations/migration_lock.toml @@ -0,0 +1,3 @@ +# Please do not edit this file manually +# It should be added in your version-control system (e.g., Git) +provider = "postgresql" diff --git a/prisma/schema.prisma b/prisma/schema.prisma new file mode 100644 index 0000000..14984f2 --- /dev/null +++ b/prisma/schema.prisma @@ -0,0 +1,38 @@ +// Prisma schema for circuit-virtual-lab-server +// PostgreSQL provider, use DATABASE_URL from .env + +generator client { + provider = "prisma-client-js" +} + +datasource db { + provider = "postgresql" + url = env("DATABASE_URL") +} + +model User { + id String @id @default(cuid()) + username String @unique + password String // bcrypt hash + avatar Bytes? // store binary avatar + avatarMime String? + createdAt DateTime @default(now()) + updatedAt DateTime @updatedAt + models CircuitModel[] +} + +model CircuitModel { + id String @id @default(cuid()) + title String + author User @relation(fields: [authorId], references: [id], onDelete: Cascade) + authorId String + desc String // markdown + model Json // JSON model data + preview Bytes? // binary preview image + previewMime String? + createdAt DateTime @default(now()) + updatedAt DateTime @updatedAt + + @@index([authorId]) + @@index([createdAt]) +} diff --git a/prisma/seed.ts b/prisma/seed.ts new file mode 100644 index 0000000..ab5e332 --- /dev/null +++ b/prisma/seed.ts @@ -0,0 +1,54 @@ +import 'dotenv/config'; +import { prisma } from '../src/lib/prisma'; +import bcrypt from 'bcryptjs'; + +async function main() { + // Ensure an initial user + const username = 'admin'; + const password = 'admin123'; + const hash = await bcrypt.hash(password, 10); + const user = await prisma.user.upsert({ + where: { username }, + create: { username, password: hash }, + update: {}, + }); + + // Insert sample models + const tinyPng = Buffer.from( + 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMBA7P6sGQAAAAASUVORK5CYII=', + 'base64' + ); + + const samples = [ + { + title: '直流电桥测电阻（单臂）', + desc: '使用直流电桥进行未知电阻测量的经典实验。', + model: { type: 'dc_bridge_single_arm', version: 1 }, + }, + { + title: 'RC 充放电实验', + desc: '研究 RC 电路的充放电过程与时间常数。', + model: { type: 'rc_charge_discharge', version: 1 }, + }, + ]; + + for (const s of samples) { + await prisma.circuitModel.create({ + data: { + title: s.title, + desc: s.desc, + model: s.model as any, + preview: tinyPng, + previewMime: 'image/png', + authorId: user.id, + }, + }); + } + + console.log('Seed completed. Admin user:', username, 'password:', password); +} + +main().catch((e) => { + console.error(e); + process.exit(1); +}); diff --git a/src/app.ts b/src/app.ts new file mode 100644 index 0000000..03e8e37 --- /dev/null +++ b/src/app.ts @@ -0,0 +1,21 @@ +import express from 'express'; +import cors from 'cors'; +import helmet from 'helmet'; +import morgan from 'morgan'; +import { router as apiRouter } from './routes'; +import { errorHandler } from './middlewares/errorHandler'; + +export function createApp() { + const app = express(); + app.disable('x-powered-by'); + app.use(helmet()); + app.use(cors()); + app.use(express.json({ limit: '10mb' })); + app.use(express.urlencoded({ extended: true })); + app.use(morgan('dev')); + + app.get('/health', (_req: express.Request, res: express.Response) => res.json({ ok: true })); + app.use('/api', apiRouter); + app.use(errorHandler); + return app; +} diff --git a/src/lib/base64.ts b/src/lib/base64.ts new file mode 100644 index 0000000..71431b9 --- /dev/null +++ b/src/lib/base64.ts @@ -0,0 +1,7 @@ +export function decodeBase64ToBuffer(b64?: string): Buffer | undefined { + if (!b64) return undefined; + // Allow both pure base64 and data URLs + const parts = b64.split(','); + const payload = parts.length > 1 ? parts[1]! : parts[0]!; + return Buffer.from(payload as string, 'base64'); +} diff --git a/src/lib/prisma.ts b/src/lib/prisma.ts new file mode 100644 index 0000000..6edcac9 --- /dev/null +++ b/src/lib/prisma.ts @@ -0,0 +1,10 @@ +import { PrismaClient } from '@prisma/client'; + +// Ensure single instance in dev with Bun hot reload +const globalForPrisma = globalThis as unknown as { prisma?: PrismaClient }; + +export const prisma = globalForPrisma.prisma ?? new PrismaClient(); + +if (process.env.NODE_ENV !== 'production') { + globalForPrisma.prisma = prisma; +} diff --git a/src/lib/validators.ts b/src/lib/validators.ts new file mode 100644 index 0000000..49cc0c5 --- /dev/null +++ b/src/lib/validators.ts @@ -0,0 +1,32 @@ +import { z } from 'zod'; + +const base64Regex = /^(data:[^;]+;base64,)?[A-Za-z0-9+/]+={0,2}$/; + +export const RegisterSchema = z.object({ + username: z.string().min(3).max(32), + password: z.string().min(6).max(128), +}); + +export const UpdateProfileSchema = z.object({ + username: z.string().min(3).max(32).optional(), + avatarBase64: z.string().regex(base64Regex, 'Invalid base64').optional(), + avatarMime: z.string().optional(), +}); + +export const CreateModelSchema = z.object({ + title: z.string().min(1).max(200), + desc: z.string().min(1), + model: z.any(), + previewBase64: z.string().regex(base64Regex, 'Invalid base64').optional(), + previewMime: z.string().optional(), +}); + +export const UpdateModelSchema = CreateModelSchema.partial(); + +export const ListQuerySchema = z.object({ + q: z.string().optional(), + authorId: z.string().optional(), + page: z.coerce.number().int().min(1).default(1), + pageSize: z.coerce.number().int().min(1).max(100).default(20), + sort: z.enum(['new', 'old']).default('new'), +}); diff --git a/src/middlewares/basicAuth.ts b/src/middlewares/basicAuth.ts new file mode 100644 index 0000000..2b131a8 --- /dev/null +++ b/src/middlewares/basicAuth.ts @@ -0,0 +1,32 @@ +import type { Request, Response, NextFunction } from 'express'; +import { prisma } from '../lib/prisma'; +import bcrypt from 'bcryptjs'; + +export async function basicAuth(req: Request, res: Response, next: NextFunction) { + try { + const auth = req.headers['authorization']; + if (!auth || !auth.startsWith('Basic ')) { + res.setHeader('WWW-Authenticate', 'Basic realm="User Visible Realm"'); + return res.status(401).json({ error: 'Unauthorized' }); + } + const b64 = auth.slice('Basic '.length); + let decoded: string; + try { + decoded = Buffer.from(b64, 'base64').toString('utf8'); + } catch (e) { + return res.status(400).json({ error: 'Invalid Authorization header' }); + } + const idx = decoded.indexOf(':'); + if (idx === -1) return res.status(400).json({ error: 'Invalid Authorization payload' }); + const username = decoded.slice(0, idx); + const password = decoded.slice(idx + 1); + const user = await prisma.user.findUnique({ where: { username } }); + if (!user) return res.status(401).json({ error: 'Invalid credentials' }); + const ok = await bcrypt.compare(password, user.password); + if (!ok) return res.status(401).json({ error: 'Invalid credentials' }); + (req as any).user = { id: user.id, username: user.username }; + next(); + } catch (err) { + next(err); + } +} diff --git a/src/middlewares/errorHandler.ts b/src/middlewares/errorHandler.ts new file mode 100644 index 0000000..c6203c8 --- /dev/null +++ b/src/middlewares/errorHandler.ts @@ -0,0 +1,8 @@ +import type { Request, Response, NextFunction } from 'express'; + +export function errorHandler(err: any, _req: Request, res: Response, _next: NextFunction) { + console.error(err); + const status = typeof err?.status === 'number' ? err.status : 500; + const message = err?.message || 'Internal Server Error'; + res.status(status).json({ error: message }); +} diff --git a/src/routes/index.ts b/src/routes/index.ts new file mode 100644 index 0000000..c04a5f3 --- /dev/null +++ b/src/routes/index.ts @@ -0,0 +1,7 @@ +import { Router } from 'express'; +import { router as users } from './users'; +import { router as models } from './models'; + +export const router = Router(); +router.use('/users', users); +router.use('/models', models); diff --git a/src/routes/models.ts b/src/routes/models.ts new file mode 100644 index 0000000..9b541f4 --- /dev/null +++ b/src/routes/models.ts @@ -0,0 +1,122 @@ +import { Router, type Request, type Response } from 'express'; +import { prisma } from '../lib/prisma'; +import { basicAuth } from '../middlewares/basicAuth'; +import { CreateModelSchema, UpdateModelSchema, ListQuerySchema } from '../lib/validators'; +import { decodeBase64ToBuffer } from '../lib/base64'; + +export const router = Router(); + +// Create model +router.post('/', basicAuth, async (req: Request, res: Response) => { + const parsed = CreateModelSchema.safeParse(req.body); + if (!parsed.success) return res.status(400).json({ error: parsed.error.flatten() }); + const { title, desc, model, previewBase64, previewMime } = parsed.data; + const created = await prisma.circuitModel.create({ + data: { + title, + desc, + model, + preview: decodeBase64ToBuffer(previewBase64), + previewMime: previewBase64 ? (previewMime ?? 'image/png') : null, + authorId: (req as any).user.id, + }, + }); + res.status(201).json({ id: created.id }); +}); + +// Update model +router.put('/:id', basicAuth, async (req: Request, res: Response) => { + const id = req.params.id; + const owned = await prisma.circuitModel.findUnique({ where: { id }, select: { authorId: true } }); + if (!owned) return res.status(404).json({ error: 'Not found' }); + if (owned.authorId !== (req as any).user.id) return res.status(403).json({ error: 'Forbidden' }); + const parsed = UpdateModelSchema.safeParse(req.body); + if (!parsed.success) return res.status(400).json({ error: parsed.error.flatten() }); + const { title, desc, model, previewBase64, previewMime } = parsed.data; + const data: any = {}; + if (title !== undefined) data.title = title; + if (desc !== undefined) data.desc = desc; + if (model !== undefined) data.model = model; + if (previewBase64 !== undefined) { + data.preview = decodeBase64ToBuffer(previewBase64); + data.previewMime = previewBase64 ? (previewMime ?? 'image/png') : null; + } + const updated = await prisma.circuitModel.update({ where: { id }, data }); + res.json({ id: updated.id }); +}); + +// Delete model +router.delete('/:id', basicAuth, async (req: Request, res: Response) => { + const id = req.params.id; + const owned = await prisma.circuitModel.findUnique({ where: { id }, select: { authorId: true } }); + if (!owned) return res.status(404).json({ error: 'Not found' }); + if (owned.authorId !== (req as any).user.id) return res.status(403).json({ error: 'Forbidden' }); + await prisma.circuitModel.delete({ where: { id } }); + res.status(204).end(); +}); + +// Get by id +router.get('/:id', async (req: Request, res: Response) => { + const id = req.params.id; + const m = await prisma.circuitModel.findUnique({ + where: { id }, + select: { + id: true, + title: true, + desc: true, + model: true, + authorId: true, + createdAt: true, + updatedAt: true, + }, + }); + if (!m) return res.status(404).json({ error: 'Not found' }); + res.json(m); +}); + +// List models with pagination and simple search +router.get('/', async (req: Request, res: Response) => { + const parsed = ListQuerySchema.safeParse(req.query); + if (!parsed.success) return res.status(400).json({ error: parsed.error.flatten() }); + const { page, pageSize, authorId, sort, q } = parsed.data; + const where: any = {}; + if (authorId) where.authorId = authorId; + if (q) where.OR = [ + { title: { contains: q, mode: 'insensitive' } }, + { desc: { contains: q, mode: 'insensitive' } }, + ]; + const total = await prisma.circuitModel.count({ where }); + const items = await prisma.circuitModel.findMany({ + where, + orderBy: { createdAt: sort === 'new' ? 'desc' : 'asc' }, + skip: (page - 1) * pageSize, + take: pageSize, + select: { + id: true, + title: true, + authorId: true, + createdAt: true, + updatedAt: true, + }, + }); + res.json({ page, pageSize, total, items }); +}); + +// Download model JSON +router.get('/:id/model.json', async (req: Request, res: Response) => { + const id = req.params.id; + const m = await prisma.circuitModel.findUnique({ where: { id }, select: { model: true, title: true } }); + if (!m) return res.status(404).end(); + res.setHeader('Content-Type', 'application/json'); + res.setHeader('Content-Disposition', `attachment; filename="${encodeURIComponent(m.title)}.json"`); + res.end(JSON.stringify(m.model)); +}); + +// Get preview image +router.get('/:id/preview', async (req: Request, res: Response) => { + const id = req.params.id; + const m = await prisma.circuitModel.findUnique({ where: { id }, select: { preview: true, previewMime: true } }); + if (!m || !m.preview) return res.status(404).end(); + res.setHeader('Content-Type', m.previewMime ?? 'image/png'); + res.end(Buffer.from(m.preview)); +}); diff --git a/src/routes/users.ts b/src/routes/users.ts new file mode 100644 index 0000000..a23bfb9 --- /dev/null +++ b/src/routes/users.ts @@ -0,0 +1,50 @@ +import { Router, type Request, type Response } from 'express'; +import { prisma } from '../lib/prisma'; +import { RegisterSchema, UpdateProfileSchema } from '../lib/validators'; +import bcrypt from 'bcryptjs'; +import { basicAuth } from '../middlewares/basicAuth'; +import { decodeBase64ToBuffer } from '../lib/base64'; + +export const router = Router(); + +// Register new user +router.post('/register', async (req: Request, res: Response) => { + const parsed = RegisterSchema.safeParse(req.body); + if (!parsed.success) return res.status(400).json({ error: parsed.error.flatten() }); + const { username, password } = parsed.data; + const exists = await prisma.user.findUnique({ where: { username } }); + if (exists) return res.status(409).json({ error: 'Username already exists' }); + const hash = await bcrypt.hash(password, 10); + const user = await prisma.user.create({ data: { username, password: hash } }); + return res.status(201).json({ id: user.id, username: user.username, createdAt: user.createdAt }); +}); + +// Get current user +router.get('/me', basicAuth, async (req: Request, res: Response) => { + const me = await prisma.user.findUnique({ where: { id: (req as any).user.id } }); + if (!me) return res.status(404).json({ error: 'User not found' }); + res.json({ id: me.id, username: me.username, createdAt: me.createdAt, updatedAt: me.updatedAt }); +}); + +// Update profile (username, avatar) +router.put('/me', basicAuth, async (req: Request, res: Response) => { + const parsed = UpdateProfileSchema.safeParse(req.body); + if (!parsed.success) return res.status(400).json({ error: parsed.error.flatten() }); + const { username, avatarBase64, avatarMime } = parsed.data; + const data: any = {}; + if (username) data.username = username; + if (avatarBase64) { + data.avatar = decodeBase64ToBuffer(avatarBase64); + data.avatarMime = avatarMime ?? 'image/png'; + } + const user = await prisma.user.update({ where: { id: (req as any).user.id }, data }); + res.json({ id: user.id, username: user.username, updatedAt: user.updatedAt }); +}); + +// Get avatar binary +router.get('/:id/avatar', async (req: Request, res: Response) => { + const u = await prisma.user.findUnique({ where: { id: req.params.id }, select: { avatar: true, avatarMime: true } }); + if (!u || !u.avatar) return res.status(404).end(); + res.setHeader('Content-Type', u.avatarMime ?? 'image/png'); + res.end(Buffer.from(u.avatar)); +}); diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..bfa0fea --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,29 @@ +{ + "compilerOptions": { + // Environment setup & latest features + "lib": ["ESNext"], + "target": "ESNext", + "module": "Preserve", + "moduleDetection": "force", + "jsx": "react-jsx", + "allowJs": true, + + // Bundler mode + "moduleResolution": "bundler", + "allowImportingTsExtensions": true, + "verbatimModuleSyntax": true, + "noEmit": true, + + // Best practices + "strict": true, + "skipLibCheck": true, + "noFallthroughCasesInSwitch": true, + "noUncheckedIndexedAccess": true, + "noImplicitOverride": true, + + // Some stricter flags (disabled by default) + "noUnusedLocals": false, + "noUnusedParameters": false, + "noPropertyAccessFromIndexSignature": false + } +}