把 visionA-backend 6 個 in-memory store 接到資料庫持久化,範圍=完整 (PG 全接 + session 接 Redis + 交易韌性)。interface / handler 不動, 只加 DB 實作 + 換 wiring,config 未設 DB 時保留 in-memory fallback。 - 塊 0 基礎建設:pgx/v5 連線池 + DatabaseConfig/RedisConfig + golang-migrate runner(embed)+ cmd/migrate + testcontainers 測試基礎建設 - 塊 1 model → Postgres:array 映射、upsert 保留 CreatedAt、faa_object_key、 三維 filter(owner/chip/source)、soft-delete partial index - 塊 2 device → Postgres:partial unique(已刪 serial 可重註冊)、雙狀態欄位 - 塊 3 token → Postgres:pairing_tokens + session_tokens 分表、token_hash 當 PK - 塊 4 userSession → Redis:idle + absolute 雙 TTL 取代 cleanup goroutine (tunnel session 維持 in-memory,yamux handle 不可序列化) - 塊 5 交易/韌性:WithTx helper + 刪 device cascade 撤銷 token(同 tx 原子) + /healthz ping PG/Redis(fail-fast 503)+ pgx error 統一映射(不洩漏 raw error) 降級策略(fail-fast):PG 掉 → 持久資料 API 回 503;Redis 掉 → session 失敗 不自動 fallback in-memory(避免多機 session 不同步)。 DB:PostgreSQL 14.23(gen_random_uuid 內建、無 citext → email 用 lower() unique index)。每塊經 Reviewer 審查 + 真 PG/Redis testcontainers 全量 dbtest 綠燈, in-memory fallback 未受影響。 docs: 同步更新 database.md(schema/config/migration 清單)+ api-spec.md (409/503 錯誤碼、/healthz 新行為、device unpair cascade)。 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
433 lines
18 KiB
Markdown
433 lines
18 KiB
Markdown
# visionA-backend
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> visionA Cloud 的後端服務。由 **`api-server`**(無狀態 REST/WS API)與 **`remote-proxy`**(有狀態 tunnel server)兩個 binary 組成。
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---
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## ⚠️ Phase 0 雛形警告
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**這是雛形(prototype)版本,不是生產交付物。** 主要限制:
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- 單一 user(永遠回 `demo-user`,無真正認證)
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- 所有狀態 in-memory(重啟即消失,無 DB / Redis)
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- Storage 走 LocalFS(無 S3)
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- WebSocket proxy 尚未實作(所有 `/ws/*` 皆回 501)
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- 單一 instance(無水平擴展)
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完整限制見下方 [雛形範圍與限制](#雛形範圍與限制)。
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---
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## 架構總覽
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```
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┌─────────────────────┐
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│ Browser / curl │
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└──────────┬──────────┘
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│ REST / WS (3721)
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▼
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┌──────────────────────────────┐
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│ api-server │
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│ (cmd/api-server) │
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│ │
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│ - REST + WS handler │
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│ - Auth middleware(static)│
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│ - ProxyClientStore │
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│ (查詢 session) │
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│ - Forwarder │
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│ (轉發 HTTP 到 tunnel) │
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│ - LocalFS storage (/storage)│
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│ 無狀態,可水平擴展 │
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└──────────┬───────────────────┘
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│ internal HTTP (3801)
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▼
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┌──────────────────────────────┐
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│ remote-proxy │
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│ (cmd/remote-proxy) │
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│ │
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│ - Tunnel server (ws://3800) │
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│ - yamux session store │
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│ - /internal/forward/raw │
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│ - /internal/session/:token │
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│ │
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│ ⚠️ 有狀態(單 instance) │
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└──────────┬───────────────────┘
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│ WebSocket + yamux (3800)
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▼
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┌──────────────────────────────┐
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│ Local Agent │
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│ (在客戶端機器上跑) │
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│ │
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│ 目前 demo 用 POC 的 │
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│ edge-ai-server 當 client │
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└──────────────────────────────┘
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```
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詳細設計見:
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- [`.autoflow/04-architecture/design-doc.md`](../.autoflow/04-architecture/design-doc.md)(§7 部署)
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- [`.autoflow/04-architecture/TDD.md`](../.autoflow/04-architecture/TDD.md)
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- [`.autoflow/04-architecture/api/api-spec.md`](../.autoflow/04-architecture/api/api-spec.md)(前端 REST API)
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- [`.autoflow/04-architecture/api/api-internal.md`](../.autoflow/04-architecture/api/api-internal.md)(api-server ↔ remote-proxy)
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---
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## 技術堆疊
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| 層級 | 技術 | 備註 |
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|------|------|------|
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| 語言 | Go 1.26 | `go.mod` 鎖定 |
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| HTTP framework | [Gin](https://github.com/gin-gonic/gin) + `gin-contrib/cors` | B4 導入 |
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| Tunnel 傳輸 | `gorilla/websocket` + `hashicorp/yamux` | 沿用 POC `edge-ai-platform` |
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| Logging | `log/slog`(stdlib) | JSON handler,結構化輸出 |
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| ID 生成 | `google/uuid` | request-id / demo seed |
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| 單元測試 | `stretchr/testify` | B2 導入 |
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| 配置 | 12-Factor App | 全走 env,不寫死 |
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---
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## 快速啟動(10 分鐘起步)
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### 前置
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- Go 1.26+(本機 run)或 Docker 27+(容器 run)
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- macOS / Linux(Windows 未測試)
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### 方式 A:本機 `go run`(最快,適合開發)
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```bash
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cd visionA-backend
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# 1) 一鍵跑 remote-proxy + api-server(任一 Ctrl+C 兩個都會停)
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make dev
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# 另開 terminal 驗證:
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curl http://localhost:3721/healthz
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# {"status":"ok"}
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curl -X POST http://localhost:3721/api/auth/login \
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-H "Content-Type: application/json" \
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-d '{"email":"demo@visionA.local","password":"any"}'
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# {"success":true,"data":{"user":{"id":"demo-user",...},"access_token":"demo-access-token",...}}
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```
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### 方式 B:Docker Compose(接近生產拓撲)
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```bash
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cd visionA-backend
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# 1) 複製環境變數範本
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cp .env.example .env
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# (視情況編輯 .env — 通常預設就能跑)
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# 2) 建 image + 啟動
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make docker-compose-up
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# 3) 驗證
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curl http://localhost:3721/healthz
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curl -X POST http://localhost:3721/api/auth/login \
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-H "Content-Type: application/json" \
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-d '{"email":"demo@visionA.local","password":"any"}'
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# 4) 跟 logs
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make docker-compose-logs
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# 5) 停
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make docker-compose-down
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```
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**Ports:**
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- `3721`:api-server REST + WS(對前端)
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- `3800`:remote-proxy tunnel WS(對 local agent)
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- `3801`:remote-proxy internal HTTP(compose 內部,不對外)
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---
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## 如何用 POC `edge-ai-server` 驗證 tunnel
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雛形不包含 local agent(Q3 決策:local agent 模組 Phase 1 才做)。要驗證 tunnel 整條鏈路,用 POC `edge-ai-platform/edge-ai-server` 當 tunnel client。
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### 步驟
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```bash
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# Terminal 1 — 起 visionA-backend
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cd visionA-backend
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make dev
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# 或 docker compose up
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# Terminal 2 — 申請 pairing token(雛形:POST 就會配發一個)
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curl -X POST http://localhost:3721/api/pairing/token \
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-H "Content-Type: application/json" \
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-d '{"name":"demo"}'
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# { "success": true, "data": { "token": "vAc_...", "expires_at": "..." } }
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# Terminal 3 — POC edge-ai-server 當 tunnel client 接上來
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cd /path/to/edge-ai-platform
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./dist/edge-ai-server \
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--relay-url=ws://localhost:3800/tunnel/connect \
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--relay-token=vAc_<貼上上一步的 token>
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# Terminal 2 — 驗證 tunnel 已連上
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curl -H "Authorization: Bearer demo-access-token" \
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http://localhost:3721/api/pairing/status
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# { "success": true, "data": { "connected": true, ... } }
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# 打到 local agent(會被 forward 過 tunnel)
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curl -H "Authorization: Bearer demo-access-token" \
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http://localhost:3721/api/devices/scan
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```
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### 或:用 B3 的 fake tunnel client 寫小 demo
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若不想起 POC,`cmd/api-server/b5_integration_test.go` 裡的 `startFakeTunnelClient` 是現成的 60 行範例,直接複製到 `cmd/tunnel-demo/main.go` 就能跑。
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---
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## 目錄結構
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```
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visionA-backend/
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├── cmd/
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│ ├── api-server/ # REST/WS API server(無狀態)
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│ │ ├── main.go
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│ │ ├── seed.go # --seed-demo-data 用的示範資料
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│ │ ├── integration_test.go # B4 端到端測試
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│ │ └── b5_integration_test.go # B5 端到端測試(含 tunnel forward + model upload)
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│ ├── migrate/ # 獨立 migration 工具(go run ./cmd/migrate up|down|version)
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│ └── remote-proxy/ # tunnel server(有狀態,持有 session in-memory)
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│ └── main.go
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├── internal/
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│ ├── api/ # API handlers + Gin router + middleware(B4 + B5)
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│ ├── auth/ # AuthService / AuthProvider / PairingStore(雛形 Static + InMemory)
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│ ├── session/ # Store / Handle / Forwarder / ProxyClient
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│ ├── device/ # Device domain + InMemoryRepository
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│ ├── model/ # Model domain + InMemoryRepository
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│ ├── cluster/ # Cluster domain(POC 複製,dispatcher 留 TODO)
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│ ├── relay/ # tunnel server + internal forward API(POC 改造)
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│ ├── wsconn/ # WebSocket ↔ net.Conn adapter(POC 複製)
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│ ├── converter/ # StubClient(Phase 2 才實作)
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│ ├── storage/ # Store interface + LocalFSStore(HMAC presigned URL)
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│ ├── config/ # Config + Load()(12-Factor;含 DatabaseConfig / RedisConfig)
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│ ├── db/ # DB 接入塊 0:pgxpool 連線池 + migration runner(嵌入式)
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│ │ └── testsupport/ # testcontainers 整合測試 helper + fixture factory(-tags=dbtest)
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│ └── logger/ # slog JSON logger wrapper
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├── migrations/ # golang-migrate SQL(NNNN_*.up/down.sql)+ embed.go
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├── docker/
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│ ├── Dockerfile.api-server # multi-stage,non-root,healthcheck
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│ ├── Dockerfile.remote-proxy
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│ └── docker-compose.yml
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├── .env.example # 環境變數範本(commit)
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├── .gitignore # 已排除 .env / bin/ / data/
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├── Makefile # build / dev / test / docker-* 等 targets
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├── go.mod / go.sum
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└── README.md # 本檔
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```
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---
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## API 端點摘要
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完整規格見 [`.autoflow/04-architecture/api/api-spec.md`](../.autoflow/04-architecture/api/api-spec.md)。
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| 群組 | 端點 | 說明 |
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|------|------|------|
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| System | `GET /healthz` | liveness/readiness(無需認證) |
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| System | `GET /api/system/health` | tunnel / agent 連線狀態 |
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| System | `GET /api/system/info` | 版本 + build 資訊 |
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| Auth | `POST /api/auth/login` | 雛形永遠回 `demo-user` |
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| Auth | `POST /api/auth/register` | 雛形 501 |
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| Auth | `GET /api/auth/me` | 當前 user 資訊 |
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| Pairing | `POST /api/pairing/token` | 申請 pairing token(vAc_ + 32 hex) |
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| Pairing | `GET /api/pairing/status` | 目前 user 的 tunnel 狀態 |
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| Pairing | `GET /api/pairing/tokens` | 列出已簽發的 token |
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| Pairing | `DELETE /api/pairing/tokens/:id` | revoke token |
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| Devices | `GET /api/devices` | 列出裝置 |
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| Devices | `POST /api/devices/scan` | 觸發 local agent 掃 USB(透過 tunnel) |
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| Devices | `DELETE /api/devices/:id` | unpair(同時關 tunnel) |
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| Models | `POST /api/models/init` | 兩階段上傳 step 1(拿 presigned PUT URL) |
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| Models | `PUT /storage/:signed` | 實際上傳檔案(HMAC 驗簽) |
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| Models | `POST /api/models/:id/finalize` | 兩階段上傳 step 2(marked ready) |
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| Models | `GET /api/models` | 列出模型 |
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| Clusters | `GET /api/clusters` | 列出 cluster(骨架) |
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| Storage | `GET /storage/:signed` | presigned download |
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| Camera / Inference | `/api/cameras/*`、`/api/inference/*` | proxy 到 local agent |
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| WebSocket | `/ws/*` | **雛形 501**(B7 之後補) |
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### 錯誤格式(統一)
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```json
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{
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"success": false,
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"error": {
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"code": "TUNNEL_DISCONNECTED",
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"message": "local agent 未連線或 tunnel 斷開",
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"request_id": "req_abc123"
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}
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}
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```
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錯誤碼清單見 [`internal/api/errors.go`](internal/api/errors.go)。
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---
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## 環境變數
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詳見 [`.env.example`](.env.example)。常用:
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| 變數 | 預設 | 說明 |
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|------|------|------|
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| `VISIONA_API_PORT` | `3721` | api-server listen port |
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| `VISIONA_TUNNEL_PORT` | `3800` | remote-proxy 對 local agent 的 WS port |
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| `VISIONA_PROXY_INTERNAL_PORT` | `3801` | remote-proxy 對 api-server 的內部 HTTP port |
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| `VISIONA_PROXY_INTERNAL_URL` | `http://localhost:3801` | api-server 連 remote-proxy 用(docker compose 會覆為 `http://remote-proxy:3801`) |
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| `VISIONA_SEED_DEMO_DATA` | `false` | 啟動時塞示範資料(device + model + pairing) |
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| `VISIONA_STORAGE_SIGNING_SECRET` | `dev-signing-secret-...` | presigned URL HMAC secret(**生產必改**) |
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| `VISIONA_STATIC_USER_ID` | `demo-user` | 雛形 static auth 的 user id |
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| `VISIONA_MODEL_MAX_SIZE_MB` | `100` | 模型上傳大小上限 |
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| `VISIONA_CORS_ALLOWED_ORIGINS` | `http://localhost:3000` | CORS 白名單(逗號分隔) |
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| `VISIONA_LOG_LEVEL` | `info` | debug / info / warn / error |
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| `VISIONA_DB_HOST` / `_USER` / `_NAME` | (空) | PostgreSQL 連線;三者全非空才啟用(否則維持 in-memory) |
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| `VISIONA_DB_AUTO_MIGRATE` | `true` | 啟動時自動跑 migrate up |
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---
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## 資料庫(DB 接入塊 0)
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> 對齊 [`docs/autoflow/04-architecture/database.md`](../docs/autoflow/04-architecture/database.md) §5、§5.5。
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塊 0 = **DB 基礎建設**:PostgreSQL 連線池(pgxpool)+ migration runner(golang-migrate,
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嵌入式 SQL)+ testcontainers 整合測試骨架。
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**啟用模式**:`VISIONA_DB_HOST` / `VISIONA_DB_USER` / `VISIONA_DB_NAME` 三者全非空 → 建池 +
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自動 migrate;任一缺 → **不建池,所有 repository 維持 in-memory**(local dev fallback,雛形行為不變)。
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> ⚠️ **塊 0 範圍**:即使 DB 啟用,目前 model / device / token repository **仍是 in-memory**。
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> 建池只為驗證基礎建設可用、並讓 schema 先就位。把 repository 切到 Postgres 是塊 1–3。
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```bash
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# 設好 VISIONA_DB_* 後,手動跑 migration(或交給 api-server 啟動時 auto-migrate)
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make migrate-up
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make migrate-version # 顯示目前 schema 版本
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# DB 整合測試(testcontainers,需本機 / CI 有 Docker daemon)
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make test-db # = go test -tags=dbtest ./internal/db/...
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```
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migration 檔在 [`migrations/`](migrations/)(`NNNN_description.up.sql` / `.down.sql`),
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透過 `migrations/embed.go` 的 `//go:embed` 嵌入 binary,部署不需另複製。
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第一份 `0001_create_users_models` 建 `users` + `models`(對齊 database.md §5.1)。
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---
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## 測試
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```bash
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# 所有單元測試 + integration test + race detector(預設 tags,不需 Docker)
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make test-race
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# DB 整合測試(testcontainers,需 Docker daemon)
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make test-db
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# 僅 go vet / gofmt check
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make lint
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# 詳細輸出
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make test
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```
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覆蓋面:
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- 單元測試:`internal/{auth,session,device,model,config,storage,api,relay,wsconn,logger,converter,db}`
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- `internal/db`:DSN 組裝 / SafeTarget 遮蔽 / Config.Enabled(純函式,預設 tags 即跑)
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- Integration:
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- `cmd/api-server/integration_test.go`(B4:api-server → remote-proxy → fake tunnel)
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- `cmd/api-server/b5_integration_test.go`(B5:完整端到端 — login / scan / model upload / tunnel disconnect)
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- `internal/db/db_integration_test.go`(DB 接入塊 0:pool ping / migrate 冪等 / up-down-up / schema 形狀 / fail-fast;`-tags=dbtest`,需 Docker)
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---
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## 開發者指南
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| 我想做的事 | 看哪裡 |
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|-----------|--------|
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| 新增一個 REST endpoint | `internal/api/` 找類似的 handler 複製;proxy 類用 `newProxyHandler` |
|
||
| 改動 API 規格 | 先改 `.autoflow/04-architecture/api/api-spec.md` 再改 code |
|
||
| 加環境變數 | `internal/config/config.go` + `load.go` + `.env.example` + 本 README |
|
||
| 改 tunnel 協定 | `.autoflow/04-architecture/tunnel.md` + `internal/relay/` + `internal/session/forwarder.go` |
|
||
| 追蹤某個 Review 問題 | `.autoflow/05-implementation/review/` |
|
||
|
||
---
|
||
|
||
## Known Issues
|
||
|
||
### Tunnel client 不在本 repo
|
||
|
||
visionA-backend 只實作 tunnel **server** 端(`internal/relay/` + `internal/wsconn/`);tunnel **client** 由 visionA Agent 實作(從 POC `edge-ai-platform/server/internal/tunnel/client.go` 複製)。本 repo 過去曾保留一份 `internal/tunnel/` 副本,但因從未被 import 且會造成「兩處需要同步修補」的維護負擔,已於 2026-04-21 刪除(決策見 [`.autoflow/04-architecture/adr/adr-008-tunnel-client-reuse.md`](../.autoflow/04-architecture/adr/adr-008-tunnel-client-reuse.md))。
|
||
|
||
POC `client.go` 的 `backoff()` 有單位 mix bug(`attempt >= 1` 時永遠回 30 秒),visionA Agent 建立後需在自己的 repo 修復;本 repo 不再追蹤此 issue。
|
||
|
||
### WebSocket proxy 未實作
|
||
|
||
所有 `/ws/*` endpoint 目前回 `501 Not Implemented`。原因:`Forwarder.ForwardWebSocket` 需要 `http.Hijacker` + 雙向 `io.Copy` 架構,B7 範圍外。
|
||
|
||
前端呼叫 `/ws/*` 時會收到 JSON body `{ "success": false, "error": { "code": "NOT_IMPLEMENTED", ... } }`,瀏覽器 WebSocket 會 fail upgrade。
|
||
|
||
---
|
||
|
||
## 雛形範圍與限制
|
||
|
||
### 是什麼
|
||
|
||
- 雙 binary 架構驗證(api-server 無狀態 + remote-proxy in-memory session)
|
||
- REST + Tunnel 完整鏈路:browser → api-server → internal HTTP → remote-proxy → yamux → local agent
|
||
- 兩階段模型上傳(init → PUT presigned → finalize)
|
||
- Docker image + docker-compose 可跑
|
||
|
||
### 不是什麼
|
||
|
||
| 項目 | 雛形 | Phase 1+ |
|
||
|------|------|---------|
|
||
| Auth | static,一律 `demo-user` | OIDC / Clerk |
|
||
| 資料庫 | 無(全 in-memory) | PostgreSQL |
|
||
| Session 存放 | `remote-proxy` 進程內 | Redis(支援水平擴展) |
|
||
| 檔案儲存 | LocalFS(`./data/storage`) | S3 |
|
||
| 支援多 user | ❌ | ✅ |
|
||
| Rate limiting | ❌ | ✅ |
|
||
| Audit log | ❌ | ✅ |
|
||
| WebSocket proxy | 501 stub | ✅ |
|
||
| TLS | ❌(http only) | ✅(ALB / NLB termination) |
|
||
| 水平擴展 | ❌ | ✅(api-server 可;remote-proxy 需加 shared session store) |
|
||
|
||
### 重啟即消失
|
||
|
||
`make docker-compose-down` 或 restart 後:
|
||
- 所有 pairing token 消失
|
||
- 所有 device / model 紀錄消失(除非 `VISIONA_SEED_DEMO_DATA=true`)
|
||
- Storage 檔案保留(`./data/storage` 被 mount 為 volume)
|
||
|
||
---
|
||
|
||
## Phase 1 路線圖
|
||
|
||
- [ ] 真 auth(OIDC via Clerk / Auth0)
|
||
- [ ] PostgreSQL + Redis(參考 `.autoflow/04-architecture/database.md`)
|
||
- [ ] S3 / R2 storage backend(替換 LocalFSStore)
|
||
- [ ] WebSocket proxy(hijack + 雙向 io.Copy)
|
||
- [ ] 多裝置 / 多 cluster 支援
|
||
- [ ] Rate limiting + audit log
|
||
- [ ] K8s / ECS deployment(參考 `.autoflow/04-architecture/build-deploy.md` §7)
|
||
- [ ] CI/CD pipeline(GitHub Actions)
|
||
- [ ] Local agent 模組(獨立 binary,取代 POC edge-ai-server 當 tunnel client)
|
||
|
||
---
|
||
|
||
## 目前實作進度
|
||
|
||
- [x] **B1** 專案初始化(go.mod、目錄骨架、Makefile、.gitignore)
|
||
- [x] **B2** 共用 `internal/` 模組(core interface + in-memory 實作 + 單元測試)
|
||
- [x] **B3** `cmd/remote-proxy` + relay / tunnel / wsconn / cluster
|
||
- [x] **B4** `cmd/api-server` + `internal/api` 骨架 + Forwarder + ProxyClient
|
||
- [x] **B5** API handlers 雛形(20+ endpoint 實作、兩階段上傳、tunnel forward)
|
||
- [x] **B6** Docker image + docker-compose(multi-stage + non-root + healthcheck)
|
||
- [x] **B7** README + `.env.example` + Makefile 補完
|
||
|
||
完整任務紀錄見 [`.autoflow/progress.md`](../.autoflow/progress.md)。
|