优化数据库初始化逻辑，新增配置热更新与自动迁移支持，升级相关依赖

CONFIG.md

@@ -51,6 +51,11 @@ BingPaper 支持通过配置文件（YAML）和环境变量进行配置。
     - MySQL 示例: `user:pass@tcp(127.0.0.1:3306)/dbname?charset=utf8mb4&parseTime=True&loc=Local`
     - Postgres 示例: `host=localhost user=user password=pass dbname=db port=5432 sslmode=disable TimeZone=Asia/Shanghai`
 
+**注意：** BingPaper 支持数据库配置的热更新。如果你在程序运行时修改了 `db.type` 或 `db.dsn`，程序会自动尝试将当前数据库中的所有数据（图片记录、变体信息、Token）迁移到新的数据库中。
+- 在迁移开始前，程序会**清空**目标数据库中的相关表以防止数据冲突。
+- 迁移过程在事务中执行，确保数据一致性。
+- 迁移完成后，程序将无缝切换到新的数据库连接。
+
 #### storage (存储配置)
 - `type`: 存储类型，可选 `local`, `s3`, `webdav`。默认 `local`。
 - **local (本地存储)**:

go.mod

@@ -51,7 +51,8 @@ require (
 	github.com/cloudwego/base64x v0.1.6 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.9 // indirect
+	github.com/gin-contrib/cors v1.7.6 // indirect
 	github.com/gin-contrib/sse v1.1.0 // indirect
 	github.com/glebarez/go-sqlite v1.21.2 // indirect
 	github.com/go-openapi/jsonpointer v0.19.5 // indirect
@@ -63,7 +64,7 @@ require (
 	github.com/go-playground/validator/v10 v10.27.0 // indirect
 	github.com/go-sql-driver/mysql v1.8.1 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
-	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/goccy/go-yaml v1.18.0 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect

go.sum

@@ -66,6 +66,10 @@ github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S
 github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM=
 github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8=
+github.com/gabriel-vasile/mimetype v1.4.9 h1:5k+WDwEsD9eTLL8Tz3L0VnmVh9QxGjRmjBvAG7U/oYY=
+github.com/gabriel-vasile/mimetype v1.4.9/go.mod h1:WnSQhFKJuBlRyLiKohA/2DtIlPFAbguNaG7QCHcyGok=
+github.com/gin-contrib/cors v1.7.6 h1:3gQ8GMzs1Ylpf70y8bMw4fVpycXIeX1ZemuSQIsnQQY=
+github.com/gin-contrib/cors v1.7.6/go.mod h1:Ulcl+xN4jel9t1Ry8vqph23a60FwH9xVLd+3ykmTjOk=
 github.com/gin-contrib/gzip v0.0.6 h1:NjcunTcGAj5CO1gn4N8jHOSIeRFHIbn51z6K+xaN4d4=
 github.com/gin-contrib/gzip v0.0.6/go.mod h1:QOJlmV2xmayAjkNS2Y8NQsMneuRShOU/kjovCXNuzzk=
 github.com/gin-contrib/sse v1.1.0 h1:n0w2GMuUpWDVp7qSpvze6fAu9iRxJY4Hmj6AmBOU05w=
@@ -100,6 +104,8 @@ github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9L
 github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
+github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
 github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
 github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=

internal/bootstrap/bootstrap.go

@@ -65,6 +65,16 @@ func Init(webFS embed.FS, configPath string) *gin.Engine {
 		util.Logger.Fatal("Failed to initialize database")
 	}
 
+	// 注册数据库配置变更回调，支持热迁移
+	config.OnDBConfigChange = func(newCfg *config.Config) {
+		util.Logger.Info("Database configuration change detected, initiating migration...")
+		if err := repo.MigrateDataToNewDB(repo.DB, newCfg); err != nil {
+			util.Logger.Error("Automatic data migration failed", zap.Error(err))
+		} else {
+			util.Logger.Info("Automatic data migration finished")
+		}
+	}
+
 	// 4. 初始化存储
 	var s storage.Storage
 	var err error

internal/config/config.go

@@ -127,6 +127,9 @@ var (
 	GlobalConfig *Config
 	configLock   sync.RWMutex
 	v            *viper.Viper
+
+	// OnDBConfigChange 当数据库配置发生变更时的回调函数
+	OnDBConfigChange func(newCfg *Config)
 )
 
 func Init(configPath string) error {
@@ -206,8 +209,19 @@ func Init(configPath string) error {
 		var newCfg Config
 		if err := v.Unmarshal(&newCfg); err == nil {
 			configLock.Lock()
+			oldDBConfig := GlobalConfig.DB
 			GlobalConfig = &newCfg
+			newDBConfig := newCfg.DB
 			configLock.Unlock()
+
+			// 检查数据库配置是否发生变更
+			if oldDBConfig.Type != newDBConfig.Type || oldDBConfig.DSN != newDBConfig.DSN {
+				// 触发数据库迁移逻辑
+				// 这里由于循环依赖问题，我们可能需要通过回调或者一个统一的 Reload 函数来处理
+				if OnDBConfigChange != nil {
+					OnDBConfigChange(&newCfg)
+				}
+			}
 		}
 	})
 	v.WatchConfig()

internal/http/router.go

@@ -14,6 +14,7 @@ import (
 	"BingPaper/internal/http/handlers"
 	"BingPaper/internal/http/middleware"
 
+	"github.com/gin-contrib/cors"
 	"github.com/gin-gonic/gin"
 	swaggerFiles "github.com/swaggo/files"
 	ginSwagger "github.com/swaggo/gin-swagger"
@@ -22,6 +23,14 @@ import (
 func SetupRouter(webFS embed.FS) *gin.Engine {
 	r := gin.Default()
 
+	// CORS 配置：更宽松的配置以解决 Vue 等前端的预检请求问题
+	corsConfig := cors.DefaultConfig()
+	corsConfig.AllowAllOrigins = true
+	corsConfig.AllowMethods = []string{"GET", "POST", "PUT", "PATCH", "DELETE", "HEAD", "OPTIONS"}
+	corsConfig.AllowHeaders = []string{"Origin", "Content-Length", "Content-Type", "Authorization", "Accept", "X-Requested-With"}
+	corsConfig.AllowCredentials = true
+	r.Use(cors.New(corsConfig))
+
 	// Swagger
 	r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))
 

internal/repo/db.go

@@ -76,21 +76,20 @@ func (l *gormLogger) Trace(ctx context.Context, begin time.Time, fc func() (stri
 	}
 }
 
-func InitDB() error {
-	cfg := config.GetConfig()
-	var dialector gorm.Dialector
-
-	switch cfg.DB.Type {
+func GetDialector(dbType, dsn string) (gorm.Dialector, error) {
+	switch dbType {
 	case "mysql":
-		dialector = mysql.Open(cfg.DB.DSN)
+		return mysql.Open(dsn), nil
 	case "postgres":
-		dialector = postgres.Open(cfg.DB.DSN)
+		return postgres.Open(dsn), nil
 	case "sqlite":
-		dialector = sqlite.Open(cfg.DB.DSN)
+		return sqlite.Open(dsn), nil
 	default:
-		return fmt.Errorf("unsupported db type: %s", cfg.DB.Type)
+		return nil, fmt.Errorf("unsupported db type: %s", dbType)
 	}
+}
 
+func GetGormConfig(cfg *config.Config) *gorm.Config {
 	gormLogLevel := logger.Info
 	switch cfg.Log.DBLogLevel {
 	case "debug":
@@ -105,13 +104,23 @@ func InitDB() error {
 		gormLogLevel = logger.Silent
 	}
 
-	gormConfig := &gorm.Config{
+	return &gorm.Config{
 		Logger: &gormLogger{
 			ZapLogger: util.DBLogger,
 			LogLevel:  gormLogLevel,
 		},
 		DisableForeignKeyConstraintWhenMigrating: true,
 	}
+}
+
+func InitDB() error {
+	cfg := config.GetConfig()
+	dialector, err := GetDialector(cfg.DB.Type, cfg.DB.DSN)
+	if err != nil {
+		return err
+	}
+
+	gormConfig := GetGormConfig(cfg)
 
 	db, err := gorm.Open(dialector, gormConfig)
 	if err != nil {