feat: direct call download api by cgo dart

pkg/api/http.go

@@ -22,7 +22,7 @@ import (
 
 const instanceKey string = "apiInstance"
 
-func ListenHttp(httpCfg *base.DownloaderHttpConfig, ai *Instance) error {
+func ListenHttp(httpCfg *base.DownloaderHttpConfig, ai *Instance) (*model.HttpListenResult, func(), error) {
 	var r = mux.NewRouter()
 	r.Methods(http.MethodGet).Path("/api/v1/info").HandlerFunc(Info)
 	r.Methods(http.MethodPost).Path("/api/v1/resolve").HandlerFunc(Resolve)
@@ -106,12 +106,19 @@ func ListenHttp(httpCfg *base.DownloaderHttpConfig, ai *Instance) error {
 
 	listener, err := net.Listen("tcp", net.JoinHostPort(httpCfg.Host, fmt.Sprintf("%d", httpCfg.Port)))
 	if err != nil {
-		return err
+		return nil, nil, err
 	}
-
 	ai.srv = srv
 	ai.listener = listener
-	return nil
+
+	return &model.HttpListenResult{
+			Host: httpCfg.Host,
+			Port: listener.Addr().(*net.TCPAddr).Port,
+		}, func() {
+			if err := srv.Serve(listener); err != nil && !errors.Is(err, http.ErrServerClosed) {
+				ai.downloader.Logger.Error().Err(err).Msg("http server listen error")
+			}
+		}, nil
 }
 
 func getInstance(r *http.Request) *Instance {