notificationEventsSentTotal       = "events_sent_total"
	notificationEventsSkippedTotal    = "events_skipped_total"
)

var (
	notificationCurrentSendInProgressMD = NewCounterMD(notificationCurrentSendInProgress, "Number of concurrent async Send calls active to all targets")
	notificationEventsErrorsTotalMD     = NewCounterMD(notificationEventsErrorsTotal, "Events that were failed to be sent to the targets")

Therefore, using this for large payloads will likely be slower than using a separate connection,
and other connections will be blocked while the large payload is being sent.

## Handlers & Routes

Handlers have a predefined Handler ID. 
In addition, there can be several *static* subroutes used to differentiate between different handlers of the same ID.

func networkMetricsPrometheus(ch chan<- prometheus.Metric) {
	connStats := globalConnStats.toServerConnStats()

	// Network Sent/Received Bytes (internode)
	ch <- prometheus.MustNewConstMetric(
		prometheus.NewDesc(
			prometheus.BuildFQName(interNodeNamespace, "tx", "bytes_total"),
			"Total number of bytes sent to the other peer nodes by current MinIO server instance",
			nil, nil),
		prometheus.CounterValue,

var errLessData = StorageErr("less data available than what was requested")

// errMoreData = returned when more data was sent by the caller than what it was supposed to.
var errMoreData = StorageErr("more data was sent than what was advertised")

// indicates readDirFn to return without further applying the fn()
var errDoneForNow = errors.New("done for now")

	"net"
	"net/http"
	"os"
	"runtime/pprof"
	"sync"
	"sync/atomic"
	"time"

	"github.com/dustin/go-humanize"
)

var (
	// GlobalMinIOVersion - is sent in the header to all http targets
	GlobalMinIOVersion string

	// GlobalDeploymentID - is sent in the header to all http targets
	GlobalDeploymentID string
)

const (
	shutdownPollIntervalMax = 500 * time.Millisecond

		return err
	}

	eventData, eErr := target.store.Get(key.Name)
	if eErr != nil {
		// The last event key in a successful batch will be sent in the channel atmost once by the replayEvents()
		// Such events will not exist and would've been already been sent successfully.
		if os.IsNotExist(eErr) {
			return nil
		}
		return eErr
	}

	if err := target.send(eventData); err != nil {

					Subsystem: notifySubsystem,
					Name:      "events_sent_total",
					Help:      "Total number of events sent to the targets (deprecated, please use 'minio_notify_target_total_events' instead)",
					Type:      counterMetric,
				},
				Value: float64(nstats.TotalEvents),
			})
			for id, st := range nstats.TargetStats {
				metrics = append(metrics, MetricV2{
					Description: MetricDescription{

		}
		if ok {
			extractedSignedHeaders[http.CanonicalHeaderKey(header)] = val
			continue
		}
		switch header {
		case "expect":
			// Golang http server strips off 'Expect' header, if the
			// client sent this as part of signed headers we need to
			// handle otherwise we would see a signature mismatch.
			// `aws-cli` sets this as part of signed headers.
			//
			// According to

```

### Verify auto-encryption

> Note that auto-encryption only affects requests without S3 encryption headers. So, if a S3 client sends
> e.g. SSE-C headers, MinIO will encrypt the object with the key sent by the client and won't reach out to
> the configured KMS.

To verify auto-encryption, use the following `mc` command:

```
mc cp test.file myminio/bucket/

	return nil
}

// Step takes a string provided from a server (or just an empty string for the
// very first conversation step) and attempts to move the authentication
// conversation forward.  It returns a string to be sent to the server or an
// error if the server message is invalid.  Calling Step after a conversation
// completes is also an error.
func (x *XDGSCRAMClient) Step(challenge string) (response string, err error) {