case bool:
		_, ok = b.value.(bool)
	case string:
		_, ok = b.value.(string)
	case int64:
		_, ok = b.value.(int64)
	case float64:
		_, ok = b.value.(float64)
	case time.Time:
		_, ok = b.value.(time.Time)
	case []byte:
		_, ok = b.value.([]byte)
	case []Value:
		_, ok = b.value.([]Value)
	default:
		ok = reflect.TypeOf(v.value) == reflect.TypeOf(b.value)
	}
	return ok
}

	sys.hMutex.RLock()
	defer sys.hMutex.RUnlock()
	if h, ok := sys.hc[ep.Host]; ok {
		return !h.Online
	}
	go sys.initHC(ep)
	return false
}

// markOffline sets endpoint to offline if network i/o timeout seen.
func (sys *BucketTargetSys) markOffline(ep *url.URL) {
	sys.hMutex.Lock()
	defer sys.hMutex.Unlock()
	if h, ok := sys.hc[ep.Host]; ok {
		h.Online = false
		sys.hc[ep.Host] = h
	}
}

	if objectAPI == nil {
		return
	}

	if GlobalKMS == nil {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrKMSNotConfigured), r.URL)
		return
	}

	if _, ok := GlobalKMS.(kms.KeyManager); !ok {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL)
		return
	}

	metrics, err := GlobalKMS.Metrics(ctx)
	if err != nil {

}

// Verify if request has AWS PreSign Version '4'.
func isRequestPresignedSignatureV4(r *http.Request) bool {
	_, ok := r.Form[xhttp.AmzCredential]
	return ok
}

// Verify request has AWS PreSign Version '2'.
func isRequestPresignedSignatureV2(r *http.Request) bool {
	_, ok := r.Form[xhttp.AmzAccessKeyID]
	return ok
}

// Verify if request has AWS Post policy Signature Version '4'.

			return c, err
		}

		arnKey := p.roleArn
		if p.RolePolicy == "" {
			arnKey = DummyRoleARN
			// Ensure that at most one JWT policy claim based provider may be
			// defined.
			if _, ok := c.arnProviderCfgsMap[DummyRoleARN]; ok {
				return c, errSingleProvider
			}
		}

		c.arnProviderCfgsMap[arnKey] = &p
		c.ProviderCfgs[cfgName] = &p

		if err = c.PopulatePublicKey(arnKey); err != nil {
			return c, err

		return jwtgo.ErrSignatureInvalid
	}

	n, err := base64DecodeBytes(token[i+1:], *bufp)
	if err != nil {
		return err
	}

	var ok bool
	claims.AccessKey, ok = claims.Lookup("accessKey")
	if !ok {
		claims.AccessKey, ok = claims.Lookup("sub")
		if !ok {
			return jwtgo.NewValidationError("accessKey/sub missing",
				jwtgo.ValidationErrorClaimsInvalid)
		}
	}

	gatherers := prometheus.Gatherers{
		prometheus.DefaultGatherer,
		registry,
	}

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			tc.FuncName = "handler.MetricsLegacy"
			tc.ResponseRecorder.LogErrBody = true
		}

		mfs, err := gatherers.Gather()
		if err != nil {
			if len(mfs) == 0 {

		apiErr := InsufficientReadQuorum{}
		if len(params) >= 1 {
			apiErr.Bucket = params[0]
		}
		if len(params) >= 2 {
			apiErr.Object = decodeDirObject(params[1])
		}
		if v, ok := oerr.(InsufficientReadQuorum); ok {
			apiErr.Type = v.Type
		}
		return apiErr
	case errErasureWriteQuorum.Error():
		apiErr := InsufficientWriteQuorum{}
		if len(params) >= 1 {
			apiErr.Bucket = params[0]
		}

		rs, parseRangeErr = parseCopyPartRangeSpec(rangeHeader)
	} else {
		// This check is to see if client specified a header but the value
		// is empty for 'x-amz-copy-source-range'
		_, ok := r.Header[xhttp.AmzCopySourceRange]
		if ok {
			parseRangeErr = errInvalidRange
		}
	}

	checkCopyPartPrecondFn := func(o ObjectInfo) bool {
		if _, err := DecryptObjectInfo(&o, r); err != nil {

// that is not io.EOF.
func diskHealthCheckOK(ctx context.Context, err error) bool {
	// Check if context has a disk health check.
	tracker, ok := ctx.Value(healthDiskCtxKey{}).(*healthDiskCtxValue)
	if !ok {
		// No tracker, return
		return err == nil || errors.Is(err, io.EOF)
	}
	if err == nil || errors.Is(err, io.EOF) {
		tracker.logSuccess()
		return true
	}