fix error handling in vmess outbound

proxy/vmess/outbound/outbound.go

@@ -109,6 +109,8 @@ func (v *Handler) Process(ctx context.Context, outboundRay ray.OutboundRay, dial
 	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
 
 	requestDone := signal.ExecuteAsync(func() error {
+		defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
+
 		writer := buf.NewBufferedWriter(buf.NewWriter(conn))
 		if err := session.EncodeRequestHeader(request, writer); err != nil {
 			return newError("failed to encode request").Base(err).AtWarning()
@@ -139,23 +141,23 @@ func (v *Handler) Process(ctx context.Context, outboundRay ray.OutboundRay, dial
 				return err
 			}
 		}
-		timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
+
 		return nil
 	})
 
 	responseDone := signal.ExecuteAsync(func() error {
-		defer output.Close()
 		defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
 
 		reader := buf.NewBufferedReader(buf.NewReader(conn))
 		header, err := session.DecodeResponseHeader(reader)
 		if err != nil {
-			return err
+			return newError("failed to read header").Base(err)
 		}
 		v.handleCommand(rec.Destination(), header.Command)
 
 		reader.SetBuffered(false)
 		bodyReader := session.DecodeResponseBody(request, reader)
+
 		return buf.Copy(bodyReader, output, buf.UpdateActivity(timer))
 	})