misc: Add sanitize_path

1 files changed, 27 insertions, 0 deletions

diff --git a/misc/path.go b/misc/path.go
new file mode 100644
index 0000000..c7013d8
--- /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
+}