req := mustNewRequest(method, urlStr, contentLength, body, t)
	req.Header.Set("Content-Md5", "invalid-digest")
	cred := globalActiveCred
	if err := signRequestV4(req, cred.AccessKey, cred.SecretKey); err != nil {
		t.Fatalf("Unable to initialized new signed http request %s", err)
	}
	return req
}

func (s *DiscoveryServer) processDeltaRequest(req *discovery.DeltaDiscoveryRequest, con *Connection) error {
	stype := v3.GetShortType(req.TypeUrl)
	deltaLog.Debugf("ADS:%s: REQ %s resources sub:%d unsub:%d nonce:%s", stype,
		con.ID(), len(req.ResourceNamesSubscribe), len(req.ResourceNamesUnsubscribe), req.ResponseNonce)

	if req.TypeUrl == v3.HealthInfoType {

		// variable to mean explicitly zero.
		if req.GetBody != nil && req.ContentLength == 0 {
			req.Body = http.NoBody
			req.GetBody = func() (io.ReadCloser, error) { return http.NoBody, nil }
		}
	}

	if c.newAuthToken != nil {
		req.Header.Set("Authorization", "Bearer "+c.newAuthToken(u.RawQuery))
	}
	req.Header.Set("X-Minio-Time", time.Now().UTC().Format(time.RFC3339))

	for i, tt := range tests {
		res, err := cst.c.Do(tt.req)
		if err != nil {
			t.Errorf("%d. RoundTrip = %v", i, err)
			continue
		}
		res.Body.Close()
		req := <-gotc
		if req.Method != "CONNECT" {
			t.Errorf("method = %q; want CONNECT", req.Method)
		}
		if req.Host != tt.want {
			t.Errorf("Host = %q; want %q", req.Host, tt.want)
		}
		if req.URL.Host != tt.want {

func (s *DiscoveryServer) processRequest(req *discovery.DiscoveryRequest, con *Connection) error {
	stype := v3.GetShortType(req.TypeUrl)
	log.Debugf("ADS:%s: REQ %s resources:%d nonce:%s version:%s ", stype,
		con.ID(), len(req.ResourceNames), req.ResponseNonce, req.VersionInfo)
	if req.TypeUrl == v3.HealthInfoType {
		s.handleWorkloadHealthcheck(con.proxy, req)
		return nil
	}

	if !req.Full {
		req.Push = s.globalPushContext()
		s.dropCacheForRequest(req)
		s.AdsPushAll(req)
		return
	}
	// Reset the status during the push.
	oldPushContext := s.globalPushContext()
	if oldPushContext != nil {
		oldPushContext.OnConfigChange()
		// Push the previous push Envoy metrics.
		envoyfilter.RecordMetrics()
	}

			logKind = ek
		}
	}

	req := GetReqInfo(ctx)
	if req == nil {
		req = &ReqInfo{
			API:       "SYSTEM",
			RequestID: fmt.Sprintf("%X", time.Now().UTC().UnixNano()),
		}
	}
	req.RLock()
	defer req.RUnlock()

	API := "SYSTEM"
	switch {
	case req.API != "":
		API = req.API
	case subsystem != "":
		API += "." + subsystem
	}

	legend := report.ProfileLabels(rpt)
	ui.render(w, req, "plaintext", rpt, errList, legend, webArgs{
		TextBody: out.String(),
	})

}

// source generates a web page containing source code annotated with profile
// data.
func (ui *webInterface) source(w http.ResponseWriter, req *http.Request) {
	args := []string{"weblist", req.URL.Query().Get("f")}
	rpt, errList := ui.makeReport(w, req, args, nil)
	if rpt == nil {

// like healthCheck request
func guessIsHealthCheckReq(req *http.Request) bool {
	if req == nil {
		return false
	}
	aType := getRequestAuthType(req)
	return aType == authTypeAnonymous && (req.Method == http.MethodGet || req.Method == http.MethodHead) &&
		(req.URL.Path == healthCheckPathPrefix+healthCheckLivenessPath ||
			req.URL.Path == healthCheckPathPrefix+healthCheckReadinessPath ||

			for i := 0; i < t.N; i++ {
				req := &http.Request{}
				req.Header = make(http.Header)
				req.Header.Add("Accept", string(FmtText))
				rec := httptest.NewRecorder()
				server.handleStats(rec, req)
			}
		})
		t.Run("stats-fmtopenmetrics-"+v, func(t *testing.B) {
			for i := 0; i < t.N; i++ {
				req := &http.Request{}
				req.Header = make(http.Header)
				req.Header.Add("Accept", string(FmtOpenMetrics_1_0_0))