发布v2.15.7版本，更新内容请查看：https://github.com/bufanyun/hotgo/tree/v2.0/docs/guide-zh-CN/addon-version-upgrade.md

server/internal/library/storager/upload.go

@@ -196,9 +196,9 @@ func GetFileMeta(file *ghttp.UploadFile) (meta *FileMeta, err error) {
 	}
 
 	// 兼容naiveUI
-	naiveType := "text/plain"
-	if IsImgType(Ext(file.Filename)) {
-		naiveType = ""
+	naiveType := meta.MimeType
+	if len(naiveType) == 0 {
+		naiveType = "text/plain"
 	}
 	meta.NaiveType = naiveType