// existing ETag entry.
//
// Due to legacy S3 clients, that make incorrect assumptions
// about HTTP headers, Set should be used instead of
// http.Header.Set(...). Otherwise, some S3 clients will not
// able to extract the ETag.
func Set(etag ETag, h http.Header) {
	// Some (broken) S3 clients expect the ETag header to
	// literally "ETag" - not "Etag". Further, some clients
	// expect an ETag in double quotes. Therefore, we set the

}

type Client struct {
	client kube.Client
	remote bool
}

func getClients(ctx cli.Context) ([]*Client, error) {
	client, err := ctx.CLIClient()
	if err != nil {
		return nil, err
	}
	clients := []*Client{
		{
			client: client,
			remote: false,
		},
	}

	// Add total timeout
	ctx, cancel := context.WithTimeout(ctx, opts.Timeout)
	defer cancel()

	// Tolerance is not set, defaults to half of the locker clients.
	tolerance := len(restClnts) / 2

	// Quorum is effectively = total clients subtracted with tolerance limit
	quorum := len(restClnts) - tolerance
	if !isReadLock {
		// In situations for write locks, as a special case

	// accordingly. Client receives a HTTP error for invalid/unsupported
	// signatures.
	//
	// Validates all incoming requests to have a valid date header.
	setAuthMiddleware,
	// Redirect some pre-defined browser request paths to a static location
	// prefix.
	setBrowserRedirectMiddleware,
	// Adds 'crossdomain.xml' policy middleware to serve legacy flash clients.
	setCrossDomainPolicyMiddleware,

			//    https://blog.cloudflare.com/when-tcp-sockets-refuse-to-die/
			// This is a sensitive configuration, it is better to set it to high values, > 60 secs since it can
			// affect clients reading data with a very slow pace  (disappropriate with socket buffer sizes)
			_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, unix.TCP_USER_TIMEOUT, opts.UserTimeout)

			if opts.Interface != "" {

	biggerBufMax = maxBufferSize

	// If there is a queue, merge up to this many messages.
	maxMergeMessages = 30

	// clientPingInterval will ping the remote handler every 15 seconds.
	// Clients disconnect when we exceed 2 intervals.
	clientPingInterval = 15 * time.Second

	// Deadline for single (non-streaming) requests to complete.
	// Used if no deadline is provided on context.

}

func (i *instance) CLIClientWithRevision(rev string) (kube.CLIClient, error) {
	if i.clients == nil {
		i.clients = make(map[string]kube.CLIClient)
	}
	if i.clients[rev] == nil {
		client, err := newKubeClientWithRevision(*i.kubeconfig, *i.configContext, rev)
		if err != nil {
			return nil, err
		}
		i.clients[rev] = client
	}
	return i.clients[rev], nil
}

func (i *instance) CLIClient() (kube.CLIClient, error) {

// to activate delete only headers set delete as true
func setPutObjHeaders(w http.ResponseWriter, objInfo ObjectInfo, delete bool) {
	// We must not use the http.Header().Set method here because some (broken)
	// clients expect the ETag header key to be literally "ETag" - not "Etag" (case-sensitive).
	// Therefore, we have to set the ETag directly as map entry.
	if objInfo.ETag != "" && !delete {

func run(c *cobra.Command, ctx cli.Context, args []string) error {
	log.Debugf("metrics command invoked for workload(s): %v", args)

	client, err := ctx.CLIClientWithRevision(metricsOpts.Revision)
	if err != nil {
		return fmt.Errorf("failed to create k8s client: %v", err)
	}

	pl, err := client.PodsForSelector(context.TODO(), ctx.IstioNamespace(), "app.kubernetes.io/name=prometheus")
	if err != nil {

		if toLower {
			k = strings.ToLower(k)
		}
		apiStats[k] = v
	}
	return apiStats
}

// HTTPStats holds statistics information about
// HTTP requests made by all clients
type HTTPStats struct {
	s3RequestsInQueue       int32 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
	_                       int32 // For 64 bits alignment
	s3RequestsIncoming      uint64