Feat: get file content via anonymous url

conf/conf.ini

@@ -7,18 +7,18 @@ MaxWidth = 400
 MaxHeight = 300
 FileSuffix = ._thumb
 
-[Database]
-Type = mysql
-User = root
-Password = root
-Host = 127.0.0.1:3306
-Name = v3
-TablePrefix = v3_
+; [Database]
+; Type = mysql
+; User = root
+; Password = root
+; Host = 127.0.0.1:3306
+; Name = v3
+; TablePrefix = v3_
 
-[Redis]
-Server = 127.0.0.1:6379
-Password = 
-DB = 0
+; [Redis]
+; Server = 127.0.0.1:6379
+; Password = 
+; DB = 0
 
 [Captcha]
 Height = 60

models/file.go

@@ -52,10 +52,17 @@ func (folder *Folder) GetChildFiles() ([]File, error) {
 	return files, result.Error
 }
 
-// GetFilesByIDs 根据文件ID批量获取文件
+// GetFilesByIDs 根据文件ID批量获取文件,
+// UID为0表示忽略用户，只根据文件ID检索
+// TODO 测试
 func GetFilesByIDs(ids []uint, uid uint) ([]File, error) {
 	var files []File
-	result := DB.Where("id in (?) AND user_id = ?", ids, uid).Find(&files)
+	var result *gorm.DB
+	if uid == 0 {
+		result = DB.Where("id in (?)", ids).Find(&files)
+	} else {
+		result = DB.Where("id in (?) AND user_id = ?", ids, uid).Find(&files)
+	}
 	return files, result.Error
 }
 

models/migration.go

@@ -189,6 +189,18 @@ func addDefaultGroups() {
 			util.Log().Panic("无法创建初始注册会员用户组, %s", err)
 		}
 	}
+
+	err = nil
+	_, err = GetGroupByID(3)
+	// 未找到初始游客用户组时，则创建
+	if gorm.IsRecordNotFoundError(err) {
+		defaultAdminGroup := Group{
+			Name: "游客",
+		}
+		if err := DB.Create(&defaultAdminGroup).Error; err != nil {
+			util.Log().Panic("无法创建初始游客用户组, %s", err)
+		}
+	}
 }
 
 func addDefaultUser() {

pkg/filesystem/file.go

@@ -82,21 +82,24 @@ func (fs *FileSystem) GetContent(ctx context.Context, path string) (io.ReadSeeke
 	}
 
 	// 找到文件
-	exist, file := fs.IsFileExist(path)
-	if !exist {
-		return nil, ErrObjectNotExist
+	if len(fs.FileTarget) == 0 {
+		exist, file := fs.IsFileExist(path)
+		if !exist {
+			return nil, ErrObjectNotExist
+		}
+		fs.FileTarget = []model.File{*file}
+		ctx = context.WithValue(ctx, fsctx.FileModelCtx, file)
 	}
-	fs.FileTarget = []model.File{*file}
-	ctx = context.WithValue(ctx, fsctx.FileModelCtx, file)
+
 	// 将当前存储策略重设为文件使用的
-	fs.Policy = file.GetPolicy()
+	fs.Policy = fs.FileTarget[0].GetPolicy()
 	err = fs.dispatchHandler()
 	if err != nil {
 		return nil, err
 	}
 
 	// 获取文件流
-	rs, err := fs.Handler.Get(ctx, file.SourceName)
+	rs, err := fs.Handler.Get(ctx, fs.FileTarget[0].SourceName)
 	if err != nil {
 		return nil, ErrIO.WithError(err)
 	}

pkg/filesystem/filesystem.go

@@ -79,6 +79,22 @@ func NewFileSystem(user *model.User) (*FileSystem, error) {
 	return fs, err
 }
 
+// NewAnonymousFileSystem 初始化匿名文件系统
+// TODO 测试
+func NewAnonymousFileSystem() (*FileSystem, error) {
+	fs := &FileSystem{
+		User: &model.User{},
+	}
+
+	anonymousGroup, err := model.GetGroupByID(3)
+	if err != nil {
+		return nil, err
+	}
+
+	fs.User.Group = anonymousGroup
+	return fs, nil
+}
+
 // dispatchHandler 根据存储策略分配文件适配器
 func (fs *FileSystem) dispatchHandler() error {
 	var policyType string
@@ -134,3 +150,13 @@ func (fs *FileSystem) SetTargetDir(dirs *[]model.Folder) {
 	}
 
 }
+
+// SetTargetFileByIDs 根据文件ID设置目标文件，忽略用户ID
+func (fs *FileSystem) SetTargetFileByIDs(ids []uint) error {
+	files, err := model.GetFilesByIDs(ids, 0)
+	if err != nil || len(files) == 0 {
+		return ErrFileExisted.WithError(err)
+	}
+	fs.SetTargetFile(&files)
+	return nil
+}

pkg/serializer/error.go

@@ -64,6 +64,8 @@ const (
 	CodePolicyNotAllowed = 50003
 	// CodeIOFailed IO操作失败
 	CodeIOFailed = 50004
+	// CodeGroupNotAllowed 当前用户组不允许
+	CodeGroupNotAllowed = 50005
 	//CodeParamErr 各种奇奇怪怪的参数错误
 	CodeParamErr = 40001
 	// CodeNotSet 未定错误，后续尝试从error中获取

routers/controllers/file.go

@@ -23,7 +23,7 @@ func AnonymousGetContent(c *gin.Context) {
 	defer cancel()
 
 	var service explorer.FileAnonymousGetService
-	if err := c.ShouldBind(&service); err == nil {
+	if err := c.ShouldBindUri(&service); err == nil {
 		res := service.Download(ctx, c)
 		if res.Code != 0 {
 			c.JSON(200, res)

service/explorer/file.go

@@ -21,6 +21,25 @@ type FileAnonymousGetService struct {
 
 // Download 签名的匿名文件下载
 func (service *FileAnonymousGetService) Download(ctx context.Context, c *gin.Context) serializer.Response {
+	fs, err := filesystem.NewAnonymousFileSystem()
+	if err != nil {
+		return serializer.Err(serializer.CodeGroupNotAllowed, err.Error(), err)
+	}
+
+	// 查找文件
+	err = fs.SetTargetFileByIDs([]uint{service.ID})
+	if err != nil {
+		return serializer.Err(serializer.CodeNotSet, err.Error(), err)
+	}
+
+	// 获取文件流
+	rs, err := fs.GetDownloadContent(ctx, "")
+	if err != nil {
+		return serializer.Err(serializer.CodeNotSet, err.Error(), err)
+	}
+
+	// 发送文件
+	http.ServeContent(c.Writer, c.Request, service.Name, fs.FileTarget[0].UpdatedAt, rs)
 
 	return serializer.Response{
 		Code: 0,