package api
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import (
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"fmt"
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"os"
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"strings"
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routerService "github.com/v2fly/v2ray-core/v5/app/router/command"
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"github.com/v2fly/v2ray-core/v5/main/commands/base"
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)
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// TODO: support "-json" flag for json output
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var cmdBalancerInfo = &base.Command{
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CustomFlags: true,
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UsageLine: "{{.Exec}} api bi [--server=127.0.0.1:8080] [balancer]...",
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Short: "balancer information",
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Long: `
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Get information of specified balancers, including health, strategy
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and selecting. If no balancer tag specified, get information of
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all balancers.
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> Make sure you have "RoutingService" set in "config.api.services"
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of server config.
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Arguments:
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-json
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Use json output.
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-s, -server <server:port>
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The API server address. Default 127.0.0.1:8080
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-t, -timeout <seconds>
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Timeout seconds to call API. Default 3
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Example:
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{{.Exec}} {{.LongName}} --server=127.0.0.1:8080 balancer1 balancer2
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`,
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Run: executeBalancerInfo,
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}
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func executeBalancerInfo(cmd *base.Command, args []string) {
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setSharedFlags(cmd)
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cmd.Flag.Parse(args)
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conn, ctx, close := dialAPIServer()
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defer close()
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client := routerService.NewRoutingServiceClient(conn)
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r := &routerService.GetBalancerInfoRequest{Tag: args[0]}
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resp, err := client.GetBalancerInfo(ctx, r)
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if err != nil {
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base.Fatalf("failed to get health information: %s", err)
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}
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if apiJSON {
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showJSONResponse(resp)
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return
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}
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showBalancerInfo(resp.Balancer)
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}
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func showBalancerInfo(b *routerService.BalancerMsg) {
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const tableIndent = 4
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sb := new(strings.Builder)
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// Override
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if b.Override != nil {
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sb.WriteString(" - Selecting Override:\n")
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for i, s := range []string{b.Override.Target} {
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writeRow(sb, tableIndent, i+1, []string{s}, nil)
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}
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}
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// Selects
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sb.WriteString(" - Selects:\n")
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for i, o := range b.PrincipleTarget.Tag {
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writeRow(sb, tableIndent, i+1, []string{o}, nil)
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}
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os.Stdout.WriteString(sb.String())
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}
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func getColumnFormats(titles []string) []string {
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w := make([]string, len(titles))
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for i, t := range titles {
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w[i] = fmt.Sprintf("%%-%ds ", len(t))
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}
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return w
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}
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func writeRow(sb *strings.Builder, indent, index int, values, formats []string) {
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if index == 0 {
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// title line
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sb.WriteString(strings.Repeat(" ", indent+4))
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} else {
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sb.WriteString(fmt.Sprintf("%s%-4d", strings.Repeat(" ", indent), index))
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}
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for i, v := range values {
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format := "%-14s"
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if i < len(formats) {
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format = formats[i]
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}
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sb.WriteString(fmt.Sprintf(format, v))
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}
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sb.WriteByte('\n')
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}
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