diff --git a/models/file.go b/models/file.go
index a5aa6ce..49a5c77 100644
--- a/models/file.go
+++ b/models/file.go
@@ -81,15 +81,26 @@ func GetFilesByIDs(ids []uint, uid uint) ([]File, error) {
 // GetFilesByKeywords 根据关键字搜索文件,
 // UID为0表示忽略用户，只根据文件ID检索
 // TODO 测试
-func GetFilesByKeywords(keywords string, uid uint) ([]File, error) {
-	var files []File
-	var result *gorm.DB
+func GetFilesByKeywords(uid uint, keywords ...interface{}) ([]File, error) {
+	var (
+		files      []File
+		result     = DB
+		conditions string
+	)
+
+	// 生成查询条件
+	for i := 0; i < len(keywords); i++ {
+		conditions += "LOWER(name) like ?"
+		if i != len(keywords)-1 {
+			conditions += " or "
+		}
+	}
 
-	if uid == 0 {
-		result = DB.Where("name like ?", keywords).Find(&files)
-	} else {
-		result = DB.Where("name like ? AND user_id = ?", keywords, uid).Find(&files)
+	if uid != 0 {
+		result = result.Where("user_id = ?", uid)
 	}
+	result = result.Where("("+conditions+")", keywords...).Find(&files)
+
 	return files, result.Error
 }
 
diff --git a/models/init.go b/models/init.go
index bafc977..c782745 100644
--- a/models/init.go
+++ b/models/init.go
@@ -47,7 +47,7 @@ func Init() {
 
 	// Debug模式下，输出所有 SQL 日志
 	if conf.SystemConfig.Debug {
-		db.LogMode(false)
+		db.LogMode(true)
 	}
 
 	//db.SetLogger(util.Log())
diff --git a/pkg/filesystem/file.go b/pkg/filesystem/file.go
index 4af5560..d6a71c7 100644
--- a/pkg/filesystem/file.go
+++ b/pkg/filesystem/file.go
@@ -127,6 +127,7 @@ func (fs *FileSystem) Preview(ctx context.Context, id uint, isText bool) (*respo
 	return &response.ContentResponse{
 		Redirect: true,
 		URL:      previewURL,
+		MaxAge:   ttl,
 	}, nil
 
 }
@@ -342,8 +343,8 @@ func (fs *FileSystem) resetPolicyToFirstFile(ctx context.Context) error {
 }
 
 // Search 搜索文件
-func (fs *FileSystem) Search(ctx context.Context, keywords string) ([]Object, error) {
-	files, _ := model.GetFilesByKeywords(keywords, fs.User.ID)
+func (fs *FileSystem) Search(ctx context.Context, keywords ...interface{}) ([]Object, error) {
+	files, _ := model.GetFilesByKeywords(fs.User.ID, keywords...)
 	fs.SetTargetFile(&files)
 
 	return fs.listObjects(ctx, "/", files, nil, nil), nil
diff --git a/service/explorer/file.go b/service/explorer/file.go
index 8a7d8f4..1e1c8fc 100644
--- a/service/explorer/file.go
+++ b/service/explorer/file.go
@@ -272,6 +272,7 @@ func (service *FileIDService) PreviewContent(ctx context.Context, c *gin.Context
 
 	// 重定向到文件源
 	if resp.Redirect {
+		c.Header("Cache-Control", fmt.Sprintf("max-age=%d", resp.MaxAge))
 		return serializer.Response{
 			Code: -301,
 			Data: resp.URL,
diff --git a/service/explorer/search.go b/service/explorer/search.go
index fc63930..52ca586 100644
--- a/service/explorer/search.go
+++ b/service/explorer/search.go
@@ -24,20 +24,28 @@ func (service *ItemSearchService) Search(c *gin.Context) serializer.Response {
 
 	switch service.Type {
 	case "keywords":
-		return service.SearchKeywords(c, "%"+service.Keywords+"%", fs)
+		return service.SearchKeywords(c, fs, "%"+service.Keywords+"%")
+	case "image":
+		return service.SearchKeywords(c, fs, "%.bmp", "%.flac", "%.iff", "%.png", "%.gif", "%.jpg", "%.jpge", "%.psd", "%.svg", "%.webp")
+	case "video":
+		return service.SearchKeywords(c, fs, "%.mp4", "%.flv", "%.avi", "%.wmv", "%.mkv", "%.rm", "%.rmvb", "%.mov", "%.ogv")
+	case "audio":
+		return service.SearchKeywords(c, fs, "%.mp3", "%.flac", "%.ape", "%.wav", "%.acc", "%.ogg", "%.midi", "%.mid")
+	case "doc":
+		return service.SearchKeywords(c, fs, "%.txt", "%.md", "%.pdf", "%.doc", "%.docx", "%.ppt", "%.pptx", "%.xls", "%.xlsx", "%.pub")
 	default:
 		return serializer.ParamErr("未知搜索类型", nil)
 	}
 }
 
 // SearchKeywords 根据关键字搜索文件
-func (service *ItemSearchService) SearchKeywords(c *gin.Context, keywords string, fs *filesystem.FileSystem) serializer.Response {
+func (service *ItemSearchService) SearchKeywords(c *gin.Context, fs *filesystem.FileSystem, keywords ...interface{}) serializer.Response {
 	// 上下文
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
 	// 获取子项目
-	objects, err := fs.Search(ctx, keywords)
+	objects, err := fs.Search(ctx, keywords...)
 	if err != nil {
 		return serializer.Err(serializer.CodeNotSet, err.Error(), err)
 	}