From 513aadb9d57a2245a01beb38e5e34da7a380665c Mon Sep 17 00:00:00 2001
From: Daniel <845765@qq.com>
Date: Sun, 20 Jul 2025 10:05:13 +0800
Subject: [PATCH] :art: Improve converting network assets to local assets
 https://github.com/siyuan-note/siyuan/issues/15320

---
 kernel/model/assets.go |  2 +-
 kernel/util/file.go    | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/kernel/model/assets.go b/kernel/model/assets.go
index 6dd1eb21a..91acf052f 100644
--- a/kernel/model/assets.go
+++ b/kernel/model/assets.go
@@ -285,7 +285,7 @@ func NetAssets2LocalAssets(rootID string, onlyImg bool, originalURL string) (err
 				name, _ = url.PathUnescape(name)
 				name = util.FilterUploadFileName(name)
 				ext := util.Ext(name)
-				if "" == ext {
+				if !util.IsCommonExt(ext) {
 					if mtype := mimetype.Detect(data); nil != mtype {
 						ext = mtype.Extension()
 						name += ext
diff --git a/kernel/util/file.go b/kernel/util/file.go
index 832d1e225..169d003e4 100644
--- a/kernel/util/file.go
+++ b/kernel/util/file.go
@@ -148,6 +148,22 @@ func RemoveID(name string) string {
 	return name + ext
 }
 
+var commonSuffixes = []string{
+	".jpg", ".jpeg", ".png", ".gif", ".bmp", ".svg", ".webp", ".tiff",
+	".txt", ".pdf", ".doc", ".docx", ".xls", ".xlsx", ".ppt", ".pptx", ".md", ".rtf",
+	".zip", ".rar", ".7z", ".tar", ".gz", ".bz2",
+	".mp3", ".wav", ".aac", ".flac", ".ogg", ".m4a",
+	".mp4", ".avi", ".mkv", ".mov", ".wmv", ".flv",
+	".exe", ".bat", ".sh", ".app",
+	".js", ".ts", ".html", ".css", ".go", ".py", ".java", ".c", ".cpp", ".json", ".xml", ".yaml", ".toml",
+	".sql", ".db", ".sqlite", ".csv",
+	".iso", ".dmg", ".apk", ".bin",
+}
+
+func IsCommonExt(ext string) bool {
+	return strings.HasPrefix(ext, ".") && gulu.Str.Contains(strings.ToLower(ext), commonSuffixes)
+}
+
 func Ext(name string) (ret string) {
 	ret = path.Ext(name)
 	if "." == ret {