Feat: validate / cancel task while downloading file in aria2

pkg/aria2/aria2.go

@@ -20,6 +20,8 @@ type Aria2 interface {
 	CreateTask(task *model.Download) error
 	// 返回状态信息
 	Status(task *model.Download) (rpc.StatusInfo, error)
+	// 取消任务
+	Cancel(task *model.Download) error
 }
 
 const (
@@ -48,7 +50,8 @@ const (
 
 var (
 	// ErrNotEnabled 功能未开启错误
-	ErrNotEnabled = serializer.NewError(serializer.CodeNoPermissionErr, "离线下载功能未开启", nil)
+	ErrNotEnabled   = serializer.NewError(serializer.CodeNoPermissionErr, "离线下载功能未开启", nil)
+	ErrUserNotFound = serializer.NewError(serializer.CodeNotFound, "无法找到任务创建者", nil)
 )
 
 // DummyAria2 未开启Aria2功能时使用的默认处理器
@@ -65,6 +68,11 @@ func (instance *DummyAria2) Status(task *model.Download) (rpc.StatusInfo, error)
 	return rpc.StatusInfo{}, ErrNotEnabled
 }
 
+// Cancel 返回未开启错误
+func (instance *DummyAria2) Cancel(task *model.Download) error {
+	return ErrNotEnabled
+}
+
 // Init 初始化
 func Init() {
 	options := model.GetSettingByNames("aria2_rpcurl", "aria2_token", "aria2_options")