65 lines
2.0 KiB
Go
65 lines
2.0 KiB
Go
package db
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"mail_go/config"
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"gorm.io/driver/mysql"
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"gorm.io/driver/sqlite"
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"gorm.io/gorm"
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"gorm.io/gorm/logger"
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)
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// InitDB initializes the database connection and performs auto-migration.
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// It selects the appropriate driver based on cfg.Driver and resolves
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// the DSN path for SQLite relative to the storage base directory.
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func InitDB(cfg config.DatabaseConfig, storageCfg config.StorageConfig) (*gorm.DB, error) {
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var dialector gorm.Dialector
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switch cfg.Driver {
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case "sqlite":
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dsn := cfg.DSN
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// If the DSN is the default relative path, prepend the storage base directory
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if dsn == config.DefaultDSNWin || dsn == config.DefaultDSNLinux {
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dsn = filepath.Join(storageCfg.BaseDir, "mail.db")
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}
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// Ensure the parent directory exists for SQLite
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dir := filepath.Dir(dsn)
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if err := os.MkdirAll(dir, 0755); err != nil {
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return nil, fmt.Errorf("创建数据库目录失败 %s: %w", dir, err)
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}
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// 多连接并发（SMTP/IMAP/POP3/Web/外发 worker/推送）下：
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// - WAL 模式：读不阻塞写，消除瞬时 SQLITE_BUSY 导致写失败被吞
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// - busy_timeout=5000ms：写竞争时等待而非立刻失败
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// - synchronous=NORMAL：WAL 下安全且写入更快
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sep := "?"
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if strings.Contains(dsn, "?") {
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sep = "&"
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}
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dsn = dsn + sep + "_busy_timeout=5000&_journal_mode=WAL&_synchronous=NORMAL"
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dialector = sqlite.Open(dsn)
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case "mysql":
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dialector = mysql.Open(cfg.DSN)
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default:
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return nil, fmt.Errorf("不支持的数据库驱动: %s", cfg.Driver)
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}
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db, err := gorm.Open(dialector, &gorm.Config{
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Logger: logger.Default.LogMode(logger.Warn),
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})
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if err != nil {
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return nil, fmt.Errorf("连接数据库失败: %w", err)
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}
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// Auto-migrate all models
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if err := db.AutoMigrate(&User{}, &Domain{}, &Message{}, &Attachment{}, &BanEntry{}, &OutboundMessage{}, &ProtocolLog{}, &MailboxState{}); err != nil {
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return nil, fmt.Errorf("数据库迁移失败: %w", err)
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}
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return db, nil
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}
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