425 lines
12 KiB
Go
425 lines
12 KiB
Go
package db
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import (
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"crypto/rand"
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"database/sql"
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"encoding/hex"
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"fmt"
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"io"
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"log"
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"os"
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"sort"
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"strings"
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"time"
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_ "modernc.org/sqlite"
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)
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var DB *sql.DB
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const SchemaVersion = "v2"
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// ================================================================
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// 初始化
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// ================================================================
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func InitDB() error {
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if err := os.MkdirAll("./data", 0755); err != nil {
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return fmt.Errorf("创建数据目录失败: %w", err)
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}
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dbPath := "./data/frpc-console.db"
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var err error
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DB, err = sql.Open("sqlite", dbPath)
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if err != nil {
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return err
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}
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if err := createTables(); err != nil {
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return err
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}
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if err := runMigrations(); err != nil {
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return err
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}
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if err := ensureJwtSecret(); err != nil {
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return err
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}
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log.Println("✅ 数据库初始化完成 (Schema " + SchemaVersion + ")")
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return nil
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}
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func createTables() error {
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_, err := DB.Exec(`
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CREATE TABLE IF NOT EXISTS users (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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username TEXT UNIQUE NOT NULL,
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password_hash TEXT NOT NULL,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
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)
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`)
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if err != nil {
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return err
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}
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_, err = DB.Exec(`
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CREATE TABLE IF NOT EXISTS global_config (
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id INTEGER PRIMARY KEY CHECK (id = 1),
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server_addr TEXT NOT NULL DEFAULT 'frp.example.com',
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server_port INTEGER NOT NULL DEFAULT 7000,
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token TEXT NOT NULL DEFAULT 'CHANGE_ME',
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log_level TEXT NOT NULL DEFAULT 'info',
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log_max_days INTEGER NOT NULL DEFAULT 3,
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tcp_mux INTEGER NOT NULL DEFAULT 1,
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tcp_mux_keepalive INTEGER NOT NULL DEFAULT 30,
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heartbeat_interval INTEGER NOT NULL DEFAULT 15,
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heartbeat_timeout INTEGER NOT NULL DEFAULT 70,
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pool_count INTEGER NOT NULL DEFAULT 8,
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wire_protocol_v2 INTEGER NOT NULL DEFAULT 0,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
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)
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`)
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if err != nil {
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return err
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}
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_, err = DB.Exec(`
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CREATE TABLE IF NOT EXISTS proxies (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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name TEXT UNIQUE NOT NULL,
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type TEXT NOT NULL DEFAULT 'tcp',
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local_ip TEXT NOT NULL,
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local_port INTEGER NOT NULL,
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remote_port INTEGER NOT NULL,
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enabled INTEGER NOT NULL DEFAULT 1,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
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)
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`)
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if err != nil {
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return err
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}
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_, err = DB.Exec(`
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CREATE TABLE IF NOT EXISTS app_config (
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key TEXT PRIMARY KEY,
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value TEXT NOT NULL,
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updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
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)
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`)
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if err != nil {
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return err
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}
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var count int
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DB.QueryRow("SELECT COUNT(*) FROM global_config").Scan(&count)
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if count == 0 {
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_, err = DB.Exec(`
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INSERT INTO global_config (
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id, server_addr, server_port, token, log_level, log_max_days,
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tcp_mux, tcp_mux_keepalive, heartbeat_interval, heartbeat_timeout, pool_count,
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wire_protocol_v2
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) VALUES (1, 'frp.example.com', 7000, 'CHANGE_ME', 'info', 3, 1, 30, 15, 70, 8, 0)
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`)
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if err != nil {
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return err
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}
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log.Println("✅ 全局配置初始化完成")
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}
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return nil
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}
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// ================================================================
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// JWT 密钥管理
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// ================================================================
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func ensureJwtSecret() error {
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var value string
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err := DB.QueryRow("SELECT value FROM app_config WHERE key = 'jwt_secret'").Scan(&value)
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if err == nil && value != "" {
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return nil
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}
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bytes := make([]byte, 32)
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if _, err := rand.Read(bytes); err != nil {
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return err
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}
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secret := hex.EncodeToString(bytes)
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_, err = DB.Exec(`
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INSERT INTO app_config (key, value) VALUES ('jwt_secret', ?)
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`, secret)
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if err != nil {
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return err
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}
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log.Printf("✅ JWT 密钥已生成")
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return nil
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}
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func GetJwtSecret() (string, error) {
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var secret string
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err := DB.QueryRow("SELECT value FROM app_config WHERE key = 'jwt_secret'").Scan(&secret)
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if err != nil {
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return "", err
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}
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return secret, nil
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}
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// ================================================================
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// 迁移引擎
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// ================================================================
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func getCurrentSchemaVersion() string {
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var version string
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err := DB.QueryRow("SELECT value FROM app_config WHERE key = 'schema_version'").Scan(&version)
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if err != nil {
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if err == sql.ErrNoRows {
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var count int
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DB.QueryRow("SELECT COUNT(*) FROM users").Scan(&count)
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if count > 0 {
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return "v1"
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}
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return SchemaVersion
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}
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log.Printf("⚠️ 读取 Schema 版本失败: %v", err)
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return "v1"
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}
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return version
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}
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func setSchemaVersion(version string) error {
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_, err := DB.Exec(`
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INSERT INTO app_config (key, value) VALUES ('schema_version', ?)
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ON CONFLICT(key) DO UPDATE SET value = excluded.value, updated_at = CURRENT_TIMESTAMP
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`, version)
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return err
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}
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func backupDatabase() (string, error) {
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src := "./data/frpc-console.db"
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if _, err := os.Stat(src); os.IsNotExist(err) {
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return "", nil
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}
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timestamp := time.Now().Format("20060102_150405")
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dst := fmt.Sprintf("./data/frpc-console.db.pre-%s.%s", SchemaVersion, timestamp)
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srcFile, err := os.Open(src)
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if err != nil {
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return "", fmt.Errorf("打开源数据库失败: %w", err)
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}
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defer srcFile.Close()
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dstFile, err := os.Create(dst)
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if err != nil {
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return "", fmt.Errorf("创建备份文件失败: %w", err)
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}
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defer dstFile.Close()
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if _, err := io.Copy(dstFile, srcFile); err != nil {
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return "", fmt.Errorf("复制数据库失败: %w", err)
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}
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log.Printf("✅ 数据库备份完成: %s", dst)
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return dst, nil
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}
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func restoreDatabase(backupPath string) error {
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srcFile, err := os.Open(backupPath)
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if err != nil {
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return err
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}
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defer srcFile.Close()
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dstFile, err := os.Create("./data/frpc-console.db")
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if err != nil {
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return err
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}
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defer dstFile.Close()
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if _, err := io.Copy(dstFile, srcFile); err != nil {
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return err
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}
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log.Printf("✅ 数据库已从备份恢复: %s", backupPath)
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return nil
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}
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func runMigrations() error {
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currentVer := getCurrentSchemaVersion()
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targetVer := SchemaVersion
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log.Printf("📌 当前数据库 Schema: %s, 目标版本: %s", currentVer, targetVer)
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if currentVer == targetVer {
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var userCount int
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err := DB.QueryRow("SELECT COUNT(*) FROM users").Scan(&userCount)
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if err != nil || userCount == 0 {
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log.Println(" 数据库为空或无效，无需迁移，直接初始化")
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return nil
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}
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log.Println("✅ Schema 已是最新，数据库有效")
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return nil
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}
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log.Printf("🔄 检测到版本变更 (%s → %s)，开始迁移...", currentVer, targetVer)
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backupPath, err := backupDatabase()
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if err != nil {
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return fmt.Errorf("备份数据库失败: %w", err)
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}
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if backupPath != "" {
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log.Printf("📦 备份文件: %s", backupPath)
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}
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currentSchema := getSchemaDef(currentVer)
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targetSchema := getSchemaDef(targetVer)
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if targetSchema == nil {
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return fmt.Errorf("目标 Schema 版本 %s 未定义", targetVer)
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}
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if currentSchema == nil || schemaVersionsEqual(currentSchema, targetSchema) {
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log.Println(" 迁移类型: 轻量复制（Schema 无变更）")
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var userCount int
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err := DB.QueryRow("SELECT COUNT(*) FROM users").Scan(&userCount)
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if err != nil || userCount == 0 {
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log.Println(" 数据库为空或无效，跳过迁移，直接初始化")
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return nil
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}
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log.Println(" 数据库有效，继续使用")
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} else {
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log.Println(" 迁移类型: 重型迁移（Schema 有变更，新建表 + 搬数据）")
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if err := heavyMigration(currentSchema, targetSchema); err != nil {
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if backupPath != "" {
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log.Printf("❌ 迁移失败，尝试恢复备份: %s", backupPath)
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if restoreErr := restoreDatabase(backupPath); restoreErr != nil {
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log.Printf("⚠️ 恢复备份失败: %v", restoreErr)
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}
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}
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return fmt.Errorf("重型迁移失败: %w", err)
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}
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}
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if err := setSchemaVersion(targetVer); err != nil {
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return fmt.Errorf("更新 Schema 版本失败: %w", err)
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}
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log.Printf("✅ 迁移完成，当前 Schema: %s", targetVer)
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return nil
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}
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func heavyMigration(oldDef, newDef *SchemaVersionDef) error {
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if oldDef == nil {
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return fmt.Errorf("旧 Schema 定义为空，无法执行重型迁移")
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}
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oldTable := oldDef.TableName
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newTable := oldTable + "_new"
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createSQL := buildCreateTableSQL(newTable, newDef)
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log.Printf(" 创建新表: %s", newTable)
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if _, err := DB.Exec(createSQL); err != nil {
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return fmt.Errorf("创建新表失败: %w", err)
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}
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insertSQL, err := buildInsertSQL(oldTable, newTable, oldDef, newDef)
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if err != nil {
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return fmt.Errorf("构建数据迁移 SQL 失败: %w", err)
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}
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log.Printf(" 迁移数据: %s → %s", oldTable, newTable)
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if _, err := DB.Exec(insertSQL); err != nil {
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return fmt.Errorf("数据迁移失败: %w", err)
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}
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var oldCount, newCount int
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DB.QueryRow(fmt.Sprintf("SELECT COUNT(*) FROM %s", oldTable)).Scan(&oldCount)
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DB.QueryRow(fmt.Sprintf("SELECT COUNT(*) FROM %s", newTable)).Scan(&newCount)
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if oldCount != newCount {
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return fmt.Errorf("数据迁移不完整: 旧表 %d 行，新表 %d 行", oldCount, newCount)
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}
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log.Printf(" 数据迁移验证通过: %d 行", newCount)
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tempTable := oldTable + "_old_temp"
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if _, err := DB.Exec(fmt.Sprintf("ALTER TABLE %s RENAME TO %s", oldTable, tempTable)); err != nil {
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return fmt.Errorf("重命名旧表失败: %w", err)
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}
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if _, err := DB.Exec(fmt.Sprintf("ALTER TABLE %s RENAME TO %s", newTable, oldTable)); err != nil {
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DB.Exec(fmt.Sprintf("ALTER TABLE %s RENAME TO %s", tempTable, oldTable))
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return fmt.Errorf("重命名新表失败: %w", err)
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}
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if _, err := DB.Exec(fmt.Sprintf("DROP TABLE %s", tempTable)); err != nil {
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log.Printf("⚠️ 删除临时表失败（不影响使用）: %v", err)
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}
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log.Printf(" 表交换完成: %s (新表已生效)", oldTable)
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return nil
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}
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func buildCreateTableSQL(tableName string, def *SchemaVersionDef) string {
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var cols []string
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var primaryKey string
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for name, col := range def.Columns {
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parts := []string{name, col.Type}
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if col.NotNull {
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parts = append(parts, "NOT NULL")
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}
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if col.Default != "" {
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parts = append(parts, "DEFAULT "+col.Default)
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}
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if col.Primary {
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primaryKey = "PRIMARY KEY (" + name + ")"
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} else {
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cols = append(cols, strings.Join(parts, " "))
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}
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}
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if primaryKey != "" {
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cols = append(cols, primaryKey)
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}
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return fmt.Sprintf("CREATE TABLE %s (\n %s\n)", tableName, strings.Join(cols, ",\n "))
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}
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func buildInsertSQL(oldTable, newTable string, oldDef, newDef *SchemaVersionDef) (string, error) {
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var newCols []string
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for name := range newDef.Columns {
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newCols = append(newCols, name)
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}
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sort.Strings(newCols)
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var selectParts []string
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var colNames []string
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for _, name := range newCols {
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colNames = append(colNames, name)
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if _, ok := oldDef.Columns[name]; ok {
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selectParts = append(selectParts, name)
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} else {
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colDef := newDef.Columns[name]
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if colDef.Default != "" {
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selectParts = append(selectParts, colDef.Default+" AS "+name)
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} else if colDef.Type == "INTEGER" {
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selectParts = append(selectParts, "0 AS "+name)
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} else if colDef.Type == "TEXT" {
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selectParts = append(selectParts, "'' AS "+name)
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} else {
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selectParts = append(selectParts, "NULL AS "+name)
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}
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}
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}
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return fmt.Sprintf(
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"INSERT INTO %s (%s) SELECT %s FROM %s",
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newTable,
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strings.Join(colNames, ", "),
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strings.Join(selectParts, ", "),
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oldTable,
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), nil
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}
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