Add api command

cmd/sing-box/cmd_api_outbounds.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	F "github.com/sagernet/sing/common/format"
+
+	"github.com/spf13/cobra"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+var commandAPIOutbounds = &cobra.Command{
+	Use:   "outbounds",
+	Short: "List outbounds",
+	Args:  cobra.NoArgs,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		return runAPIOutbounds()
+	},
+}
+
+func init() {
+	commandAPIRoot.AddCommand(commandAPIOutbounds)
+}
+
+func runAPIOutbounds() error {
+	clientConn, client, err := createAPIClient()
+	if err != nil {
+		return err
+	}
+	defer clientConn.Close()
+	stream, err := client.SubscribeOutbounds(globalCtx, &emptypb.Empty{})
+	if err != nil {
+		return err
+	}
+	outbounds, err := stream.Recv()
+	if err != nil {
+		return err
+	}
+	table := tableWriter{
+		header:       []string{"TAG", "TYPE", "DELAY"},
+		emptyMessage: "no outbounds",
+	}
+	for _, item := range outbounds.GetOutbounds() {
+		table.addRow(item.GetTag(), item.GetType(), formatDelay(item.GetUrlTestDelay()))
+	}
+	table.flush()
+	return nil
+}
+
+func formatDelay(delay int32) string {
+	if delay <= 0 {
+		return ""
+	}
+	return F.ToString(delay, " ms")
+}