From f6937cf286bb568241e9e71e54c1462d792f1987 Mon Sep 17 00:00:00 2001
From: Runxi Yu <me@runxiyu.org>
Date: Tue, 11 Feb 2025 17:25:01 +0800
Subject: [PATCH] misc: Add sanitize_path

---
 misc/path.go | 27 +++++++++++++++++++++++++++

diff --git a/misc/path.go b/misc/path.go
new file mode 100644
index 0000000000000000000000000000000000000000..c7013d8a6833fbdc33364468ac3eee15b0a4b6ed
--- /dev/null
+++ b/misc/path.go
@@ -0,0 +1,27 @@
+package misc
+
+import (
+	"path/filepath"
+	"strings"
+)
+
+func sanitize_path(path string) (string, bool) {
+	if path == "" {
+		return "", false
+	}
+
+	path = strings.TrimLeft(path, "/")
+
+	for _, part := range strings.Split(path, "/") {
+		if part == "." || part == ".." {
+			path = filepath.Clean(path)
+			break
+		}
+	}
+
+	if path == ".." || strings.HasPrefix(path, "../") {
+		return "", false
+	}
+
+	return path, true
+}

-- 
2.48.1