Feat: handle aria2 download complete

pkg/util/io.go

@@ -1,6 +1,7 @@
 package util
 
 import (
+	"io"
 	"os"
 	"path/filepath"
 )
@@ -28,3 +29,18 @@ func CreatNestedFile(path string) (*os.File, error) {
 
 	return os.Create(path)
 }
+
+// IsEmpty 返回给定目录是否为空目录
+func IsEmpty(name string) (bool, error) {
+	f, err := os.Open(name)
+	if err != nil {
+		return false, err
+	}
+	defer f.Close()
+
+	_, err = f.Readdirnames(1) // Or f.Readdir(1)
+	if err == io.EOF {
+		return true, nil
+	}
+	return false, err // Either not empty or error, suits both cases
+}