package api import ( "fmt" "os" "strings" routerService "github.com/v2fly/v2ray-core/v4/app/router/command" "github.com/v2fly/v2ray-core/v4/main/commands/base" ) // TODO: support "-json" flag for json output var cmdBalancerInfo = &base.Command{ CustomFlags: true, UsageLine: "{{.Exec}} api bi [--server=127.0.0.1:8080] [balancer]...", Short: "balancer information", Long: ` Get information of specified balancers, including health, strategy and selecting. If no balancer tag specified, get information of all balancers. > Make sure you have "RoutingService" set in "config.api.services" of server config. Arguments: -json Use json output. -s, -server The API server address. Default 127.0.0.1:8080 -t, -timeout Timeout seconds to call API. Default 3 Example: {{.Exec}} {{.LongName}} --server=127.0.0.1:8080 balancer1 balancer2 `, Run: executeBalancerInfo, } func executeBalancerInfo(cmd *base.Command, args []string) { setSharedFlags(cmd) cmd.Flag.Parse(args) conn, ctx, close := dialAPIServer() defer close() client := routerService.NewRoutingServiceClient(conn) r := &routerService.GetBalancerInfoRequest{Tag: args[0]} resp, err := client.GetBalancerInfo(ctx, r) if err != nil { base.Fatalf("failed to get health information: %s", err) } if apiJSON { showJSONResponse(resp) return } showBalancerInfo(resp.Balancer) } func showBalancerInfo(b *routerService.BalancerMsg) { const tableIndent = 4 sb := new(strings.Builder) // Override if b.Override != nil { sb.WriteString(" - Selecting Override:\n") for i, s := range []string{b.Override.Target} { writeRow(sb, tableIndent, i+1, []string{s}, nil) } } // Selects sb.WriteString(" - Selects:\n") for i, o := range b.PrincipleTarget.Tag { writeRow(sb, tableIndent, i+1, []string{o}, nil) } os.Stdout.WriteString(sb.String()) } func getColumnFormats(titles []string) []string { w := make([]string, len(titles)) for i, t := range titles { w[i] = fmt.Sprintf("%%-%ds ", len(t)) } return w } func writeRow(sb *strings.Builder, indent, index int, values, formats []string) { if index == 0 { // title line sb.WriteString(strings.Repeat(" ", indent+4)) } else { sb.WriteString(fmt.Sprintf("%s%-4d", strings.Repeat(" ", indent), index)) } for i, v := range values { format := "%-14s" if i < len(formats) { format = formats[i] } sb.WriteString(fmt.Sprintf(format, v)) } sb.WriteByte('\n') }