迁移 PostgreSQL 并新增 Python API 服务

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/backend/Dockerfile

@@ -46,7 +46,6 @@ COPY --from=api --chown=app:app /out/web /app/web
 
 ENV TZ=Asia/Shanghai \
     LISTEN_ADDR=:8080 \
-    FUTURES_DB_PATH=/app/data/futures.db \
     AUTH_DB_PATH=/app/auth/auth.db
 
 EXPOSE 8080

web/backend/go.mod

@@ -5,6 +5,7 @@ go 1.25.8
 require (
 	github.com/go-chi/chi/v5 v5.1.0
 	github.com/golang-jwt/jwt/v5 v5.2.1
+	github.com/lib/pq v1.10.9
 	golang.org/x/crypto v0.27.0
 	modernc.org/sqlite v1.32.0
 )

web/backend/internal/config/config.go

@@ -7,21 +7,24 @@ import (
 )
 
 type Config struct {
-	ListenAddr     string
-	FuturesDBPath  string
-	AuthDBPath     string
-	JWTSecret      []byte
-	AdminUser      string
-	AdminPass      string
+	ListenAddr    string
+	DatabaseURL   string
+	AuthDBPath    string
+	JWTSecret     []byte
+	AdminUser     string
+	AdminPass     string
 }
 
 func Load() (*Config, error) {
 	cfg := &Config{
-		ListenAddr:    getenv("LISTEN_ADDR", ":8080"),
-		FuturesDBPath: getenv("FUTURES_DB_PATH", "/app/data/futures.db"),
-		AuthDBPath:    getenv("AUTH_DB_PATH", "/app/auth/auth.db"),
-		AdminUser:     strings.TrimSpace(os.Getenv("ADMIN_USER")),
-		AdminPass:     os.Getenv("ADMIN_PASS"),
+		ListenAddr:  getenv("LISTEN_ADDR", ":8080"),
+		DatabaseURL: os.Getenv("DATABASE_URL"),
+		AuthDBPath:  getenv("AUTH_DB_PATH", "/app/auth/auth.db"),
+		AdminUser:   strings.TrimSpace(os.Getenv("ADMIN_USER")),
+		AdminPass:   os.Getenv("ADMIN_PASS"),
+	}
+	if cfg.DatabaseURL == "" {
+		return nil, fmt.Errorf("DATABASE_URL 环境变量未设置")
 	}
 	secret := strings.TrimSpace(os.Getenv("JWT_SECRET"))
 	if len(secret) < 16 {

web/backend/internal/store/futures.go

@@ -6,21 +6,22 @@ import (
 	"errors"
 	"fmt"
 	"strings"
+
+	_ "github.com/lib/pq"
 )
 
 var ErrMissingTsCode = errors.New("ts_code 必填")
 
 type FuturesStore struct{ db *sql.DB }
 
-func OpenFutures(path string) (*FuturesStore, error) {
-	dsn := fmt.Sprintf("file:%s?mode=ro&_pragma=query_only(true)", path)
-	db, err := sql.Open("sqlite", dsn)
+func OpenFutures(databaseURL string) (*FuturesStore, error) {
+	db, err := sql.Open("postgres", databaseURL)
 	if err != nil {
-		return nil, fmt.Errorf("open futures.db: %w", err)
+		return nil, fmt.Errorf("open futures db: %w", err)
 	}
-	db.SetMaxOpenConns(4)
+	db.SetMaxOpenConns(8)
 	if err := db.Ping(); err != nil {
-		return nil, fmt.Errorf("ping futures.db: %w", err)
+		return nil, fmt.Errorf("ping futures db: %w", err)
 	}
 	return &FuturesStore{db: db}, nil
 }

web/backend/main.go

@@ -24,7 +24,7 @@ func main() {
 		log.Fatalf("config: %v", err)
 	}
 
-	futures, err := store.OpenFutures(cfg.FuturesDBPath)
+	futures, err := store.OpenFutures(cfg.DatabaseURL)
 	if err != nil {
 		log.Fatalf("open futures: %v", err)
 	}